Electronics E-Bass Electronics

The AG2PB/918 is a high impedance preamp for use with piezo or microphonic transducers. It features adjustable gain which allows you to boost the input signal up to 12dB (4X) while maintaining flat frequency response. It is less than half the size of a 9-volt battery making it ideal for instruments with limited cavity space. The AG2PB/918 provides a strong output signal and isolation from external equipment that may otherwise adversely affect pickup tone. It is often used to make a passive instrument active with very little effort. With only 4 wires to connect power, ground, input, and output it is a simple way to ensure your piezo-pickup instrument has all the power and isolation that it needs. The AG2PB/918 provides 2 independent high impedance buffers in the same space as the AGPB/918. This is great for separately boosting 2 pickups from a split piezo saddle, as part of an independent setup for individual string saddles, or to mix a piezo with a microphonic transducer. Individual gain trimmers per channel give you a lot of flexibility. Like all of our preamps, the Piezo buffers are internally shielded to reject electromagnetic noise and include internal filters to block AM and FM radio on the inputs. Bartolini set the standard of fully sealing the sensitive electronics. We use professional double tin plated pure copper wire with durable semi-rigid insulation. This ensures the 4" pre-stripped wires dont flop around in the cavity and the wires dont cut through the insulation over time. Either preamp can be used with either a single 9-volt battery (9-volt operation) or two 9-volt batteries wired in series (18-volt operation) for double the (6dB extra) headroom with no tonal change. Both versions delivery clear and transparent sound with extremely low distortion.dual channel buffer preamp for electric bassclear transparent sound with very low distortionsuitable for passive high-impedance pickups (piezo or microphonic pickups)two independent buffer channels to combine two pickupsinput impedance 3.3 MOhmoutput impedance 3.6 kOhmadjustable gain up to 12 dB for each channelsupports 18V operation for 6 dB extra headroom power supply via 1 x 9V / 2 x 9V (18V) battery (not included)dimensions (L x W x H) 26.7 x 20.1 x 10.9 mm / 1.05" x 0.79" x 0.43"Warranty Information for Electronics: Electronic components such as preamps and circuit boards by Sadowsky, MEC, Seymour Duncan, and Bartolini are covered exclusively by the legal warranty period. These items are classified as electronic wear parts and are therefore excluded from the extended 4-year warranty. Thank you for your understanding. Note: Electronic components are excluded from the right of return if their cables have been cut or soldered, if they show signs of use, if they have already been installed, or if there is other damage that affects the condition of the goods. 

The AGPB/918 is a high impedance preamp for use with piezo or microphonic transducers. It features adjustable gain which allows you to boost the input signal up to 12dB (4X) while maintaining flat frequency response. It is less than half the size of a 9-volt battery making it ideal for instruments with limited cavity space. The AGPB/918 provides a strong output signal and isolation from external equipment that may otherwise adversely affect pickup tone. It is often used to make a passive instrument active with very little effort. With only 4 wires to connect power, ground, input, and output it is a simple way to ensure your piezo-pickup instrument has all the power and isolation that it needs. Like all of our preamps, the Piezo buffers are internally shielded to reject electromagnetic noise and include internal filters to block AM and FM radio on the inputs. Bartolini set the standard of fully sealing the sensitive electronics. We use professional double tin plated pure copper wire with durable semi-rigid insulation. This ensures the 4" pre-stripped wires dont flop around in the cavity and the wires dont cut through the insulation over time. Either preamp can be used with either a single 9-volt battery (9-volt operation) or two 9-volt batteries wired in series (18-volt operation) for double the (6dB extra) headroom with no tonal change. Both versions delivery clear and transparent sound with extremely low distortion.single channel buffer preamp for electric bassclear transparent sound with very low distortionsuitable for passive high-impedance pickups (piezo or microphonic pickups)input impedance 3.3 MOhmoutput impedance 3.6 kOhmadjustable gain up to 12 dB supports 18V operation for 6 dB extra headroom power supply via 1 x 9V / 2 x 9V (18V) battery (not included)dimensions (L x W x H) 26.7 x 20.1 x 10.9 mm / 1.05" x 0.79" x 0.43"Warranty Information for Electronics: Electronic components such as preamps and circuit boards by Sadowsky, MEC, Seymour Duncan, and Bartolini are covered exclusively by the legal warranty period. These items are classified as electronic wear parts and are therefore excluded from the extended 4-year warranty. Thank you for your understanding. Note: Electronic components are excluded from the right of return if their cables have been cut or soldered, if they show signs of use, if they have already been installed, or if there is other damage that affects the condition of the goods. 

The TC series are our original preamps known as "The Chip". They are hand-made with discrete electronic components for very low noise, outstanding distortion characteristics when overdriven, and very long battery life. They are rugged, reliable and easy to install. In most cases do not require modifications to the instrument. The different versions provide different gain levels and area available as single or dual channel. The TC series are vintage designs that can be used in simple or complex ways. They include a boost signal that can be used by professional guitar technicians to further increase the output gain or to shape the frequency response for bass, mid, or treble boost. Because they rely on electrical current feedback for amplification, the tone is very well suited for high-output guitar setups. The TC series delivers very satisfying frequency-phase shift and asymmetric tube-like distortion when overdriven. Like all of our electronics modules, the TC preamps are internally shielded to reject electromagnetic noise and include internal filters to block AM and FM radio on the inputs. Bartolini set the standard of fully sealing the sensitive electronics. We use professional double tin plated pure copper wire with durable semi-rigid insulation. This ensures the 4" pre-stripped wires dont flop around in the cavity and the wires dont cut through the insulation over time. All TC preamps can be used in the un-boosted mode to provide equal amplification of all audio frequencies and very simple installation. The boosted modes allow tonal changes ranging from simple treble boost to a midrange spectrum shaping specifically designed to overdrive amplifiers to their best distortion sounds.dual channel preamp for electric guitarsvery low noisegreat distortion characteristics when overdrivensuitable für high-output guitar setups12 dB (4x) Gaininput impedance 400 kOhmoutput impedance 3.6 kOhmpower supply via 1 x 9V battery (not included)dimensions (L x W x H) 26.7 x 20.1 x 10.9 mm / 1.05" x 0.79" x 0.43"Warranty Information for Electronics: Electronic components such as preamps and circuit boards by Sadowsky, MEC, Seymour Duncan, and Bartolini are covered exclusively by the legal warranty period. These items are classified as electronic wear parts and are therefore excluded from the extended 4-year warranty. Thank you for your understanding. Note: Electronic components are excluded from the right of return if their cables have been cut or soldered, if they show signs of use, if they have already been installed, or if there is other damage that affects the condition of the goods. 

The four separate buffers in the TQB Quad Buffer can reduce electronic noise levels in instruments with passive pickups and some of our on-board preamps. Each buffer in the TQB is a low noise amplifier with a gain of 1, an input impedance of 270 kOhms and an output impedance of less than 10 kOhms. This low output impedance allows the TQB to drive 25 kOhm Volume or Blend controls very easily. This configuration was used in many instruments by Michael Tobias in the mid-late 80's. The tone quality was similar to that of the coils in parallel but with higher definition and lower noise. 4 channel buffer preamp for electric bassdiscontinued NOS equipment (not ROHS-compliant)used in some old Tobias era basses to buffer each individual coil of two humbuckersinput impedance 270 kOhmoutput impedance 10 kOhmgain factor 1supports 9 V and 18V operation power supply via 1 x 9V / 2 x 9V (18V) battery (not included)Warranty Information for Electronics: Electronic components such as preamps and circuit boards by Sadowsky, MEC, Seymour Duncan, and Bartolini are covered exclusively by the legal warranty period. These items are classified as electronic wear parts and are therefore excluded from the extended 4-year warranty. Thank you for your understanding. Note: Electronic components are excluded from the right of return if their cables have been cut or soldered, if they show signs of use, if they have already been installed, or if there is other damage that affects the condition of the goods. 

Note: The right and refund policy does not apply to electronic components if their cables have been cut or soldered, if they show signs of use, if they have already been installed or other damage affecting the condition of the goods is present.Warranty Information for Electronics: Electronic components such as preamps and circuit boards by Sadowsky, MEC, Seymour Duncan, and Bartolini are covered exclusively by the legal warranty period. These items are classified as electronic wear parts and are therefore excluded from the extended 4-year warranty. Thank you for your understanding. 

The Sadowsky Onboard Bass Preamp (4-Knob System) is a completely prewired system offering the same controls and the same legendary active preamp as all Sadowsky basses. This preamp is designed for installation on most basses with a 4-Knob Layout. On newer active electric basses with a 4-knob layout with a side jack and a battery compartment, usually no modification is required. On passive basses, the only required modification is to move the output jack to the side of the instrument and to make room for a battery. The controls are: Volume – Pan (Balance) – VTC (Vintage Tone Control) – Treble / Bass. The treble and bass controls are boost only - flat response is with the controls at their complete counterclockwise position. The VTC control is passive, the maximum setting is a flat EQ. The further you turn the control down, the more the high end in the signal will be attenuated. This system is not compatible with active pickups requiring anything else than a 250K or 500K volume or balance pot.prewired onboard bass preamp for electric basses with 4-knob layout, side jack and battery compartmentactive preamp for passive pickups4 knob layout with controls for Master Volume / Balance / Vintage Tone Control (P/P) / Treble and Bass (stacked)push/pull function at VTC knob for preamp bypassincl. 0.1 µF replacement capacitor for the VTC module for improved treble roll-off when used with Sadowsky Soapbar pickupslonger cables between the potentiometers to facilitate installation in non-Sadowsky bassesscrew terminals on the balance potentiometer for pickup hot & ground wires for solderless installationwithout Control Platefrequency response 5 Hz - 50 kHzBass control offers +18 dB boost at 40 Hz Treble control offers +18 dB boost at 4 kHztotal harmonic distortion (THD) 0.18% at 1 kHzpower supply via one 9V battery (Operating with 18V is not recommended, as this could destroy the circuit)current draw 9 mAup to 870 hours battery lifeinput impedance 1 Mohmoutput impedance 1 kohmNote: Defects or damage caused by improper installation or the use of unsuitable accessories and tools are excluded from the warranty. This includes excessively hot solder joints, incorrect solder and resulting damage to the electronics and solder joints.Note: When installing a Sadowsky Onboard Preamp on a MetroExpress bass without a control plate (Modern, Verdine White and M/J models), the holes in the body for the potentiometers must be enlarged. This is because the factory installed potentiometers on the MetroExpress have a smaller diameter than the potentiometers on the Sadowsky Onboard Preamp.Warranty Information for Electronics: Electronic components such as preamps and circuit boards by Sadowsky, MEC, Seymour Duncan, and Bartolini are covered exclusively by the legal warranty period. These items are classified as electronic wear parts and are therefore excluded from the extended 4-year warranty. Thank you for your understanding. 

The Sadowsky Onboard Bass Preamp (4-Knob System) is a completely prewired system offering the same controls and the same legendary active preamp as all Sadowsky basses. This preamp is designed for installation on most basses with a 4-Knob Layout. On newer active electric basses with a 4-knob layout with a side jack and a battery compartment, usually no modification is required. On passive basses, the only required modification is to move the output jack to the side of the instrument and to make room for a battery. The controls are: Volume – Pan (Balance) – VTC (Vintage Tone Control) – Treble / Bass. The treble and bass controls are boost only - flat response is with the controls at their complete counterclockwise position. The VTC control is passive, the maximum setting is a flat EQ. The further you turn the control down, the more the high end in the signal will be attenuated. This system is not compatible with active pickups requiring anything else than a 250K or 500K volume or balance pot.prewired onboard bass preamp for electric basses with 4-knob layout, side jack and battery compartmentfor left-handed instruments active preamp for passive pickups4 knob layout with controls for Master Volume / Balance / Vintage Tone Control (P/P) / Treble and Bass (stacked)push/pull function at VTC knob for preamp bypassincl. 0.1 µF replacement capacitor for the VTC module for improved treble roll-off when used with Sadowsky Soapbar pickupslonger cables between the potentiometers to facilitate installation in non-Sadowsky bassesscrew terminals on the balance potentiometer for pickup hot & ground wires for solderless installationwithout Control Platefrequency response 5 Hz - 50 kHzBass control offers +18 dB boost at 40 Hz Treble control offers +18 dB boost at 4 kHztotal harmonic distortion (THD) 0.18% at 1 kHzpowered by one 9V battery (Operating with 18V is not recommended, as this could destroy the circuit)current draw 9 mAup to 870 hours battery lifeinput impedance 1 Mohmoutput impedance 1 kohmNote: Defects or damage caused by improper installation or the use of unsuitable accessories and tools are excluded from the warranty. This includes excessively hot solder joints, incorrect solder and resulting damage to the electronics and solder joints.Note: When installing a Sadowsky Onboard Preamp on a MetroExpress bass without a control plate (Modern, Verdine White and M/J models), the holes in the body for the potentiometers must be enlarged. This is because the factory installed potentiometers on the MetroExpress have a smaller diameter than the potentiometers on the Sadowsky Onboard Preamp.Warranty Information for Electronics: Electronic components such as preamps and circuit boards by Sadowsky, MEC, Seymour Duncan, and Bartolini are covered exclusively by the legal warranty period. These items are classified as electronic wear parts and are therefore excluded from the extended 4-year warranty. Thank you for your understanding. 

The Sadowsky Onboard Bass Preamp (4-Knob System) is a completely prewired system offering the same controls and the same legendary active preamp as all Sadowsky basses. This preamp is designed for installation on most J-style basses with a metal control plate. On newer active J-style basses with a side jack and a battery compartment, usually no modification is required. On passive basses, the only required modification is to move the output jack to the side of the instrument and to make room for a battery. The controls are: Volume – Pan (Balance) – VTC (Vintage Tone Control) – Treble / Bass – Mid Boost switch. The treble and bass controls are boost only - flat response is with the controls at their complete counterclockwise position. The preamp also features a 500 Hz mid boost that can be switched on/off with a toggle switch. The VTC control is passive, the maximum setting is a flat EQ. The further you turn the control down, the more the high end in the signal will be attenuated. The preamp can be installed either with the included control plate or mounted through a rear control cavity in either a 4-in-line or diamond pattern. This system is not compatible with active pickups requiring anything else than a 250K or 500K volume or balance pot.prewired onboard bass preamp with Mid Boost for J-style basses with metal control plateactive preamp for passive pickups4 knob layout with controls for Master Volume / Balance / Vintage Tone Control (P/P) / Treble and Bass (stacked) / Mid Boost togglepush/pull function at VTC knob for preamp bypassincl. 0.1 µF replacement capacitor for the VTC module for improved treble roll-off when used with Sadowsky Soapbar pickupscan be installed either with the included control plate or mounted through a rear control cavityfrequency response 5 Hz - 50 kHzBass control offers +18 dB boost at 40 Hz Mid Boost switch offers +10.6 dB boost at 500 HzTreble control offers +18 dB boost at 4 kHztotal harmonic distortion (THD) 0.18% at 1 kHzpowered by one 9V battery (Operating with 18V is not recommended, as this could destroy the circuit)current draw 9 mAup to 870 hours battery lifeinput impedance 1 Mohmoutput impedance 1 kohmNote: Defects or damage resulting from culpable or improper installation as well as the use of unsuitable accessories or tools are excluded from the guarantee. This includes soldering points that are too hot, wrong soldering tin and the resulting damage to the electronics and soldering points.Note: When installing a Sadowsky Onboard Preamp on a MetroExpress bass without a control plate (Modern, Verdine White and M/J models), the holes in the body for the potentiometers must be enlarged. This is because the factory installed potentiometers on the MetroExpress have a smaller diameter than the potentiometers on the Sadowsky Onboard Preamp.Warranty Information for Electronics: Electronic components such as preamps and circuit boards by Sadowsky, MEC, Seymour Duncan, and Bartolini are covered exclusively by the legal warranty period. These items are classified as electronic wear parts and are therefore excluded from the extended 4-year warranty. Thank you for your understanding. 

This Sadowsky MetroExpress pre-wired onboard bass preamp is suitable for Sadowsky MetroExpress Modern and Verdine White Artist Line basses, it features active 2-way electronics (boost only) for passive pickups. The 4-knob layout has controls for master volume / balance / treble and bass (p/p) with a preamp bypass via the bass knob's push/pull function. The frequency range is 5 Hz to 50 kHz. The bass knob offers +18 dB boost at 40 Hz and the treble knob offers +18 dB boost at 4 kHz. Total harmonic distortion (THD) 0.18% at 1 kHz. Powered by a 9V battery that consumes 9 mA, the battery can last up to 870 hours. Input impedance is 1 mOhm, output impedance is 1 kOhm.pre-wired onboard bass preamp for MetroExpresssuitable for Modern and Verdine White Artist Line bassesactive 2-way Electronic (boost only) for passive pickups4-knob layout with controls for master volume / balance / treble and bass (p/p)preamp bypass via push/pull function on bass knobcan be installed either on the control plate or through the electronics compartmentfrequency range: 5 Hz - 50 kHzbass knob offers +18 dB boost at 40 Hztreble knob offers +18 dB boost at 4 kHztotal harmonic distortion (THD) 0.18% at 1 kHzpowered by one 9V battery (Operating with 18V is not recommended, as this could destroy the circuit)power consumption: 9 mAbattery life up to 870 hoursinput impedance: 1 mOhmoutput impedance: 1 kOhmNote: Defects or damage resulting from user error or improper installation resulting from the use of unsuitable accessories or tools are excluded from the guarantee. This includes any damage to the electronics or soldering points caused by the soldering iron being too hot and/or the use of incorrect soldering wire.

This Sadowsky MetroExpress pre-wired onboard bass preamp is suitable for left-hand Sadowsky MetroExpress Modern and Verdine White Artist Line basses, it features active 2-way electronics (boost only) for passive pickups. The 4-knob layout has controls for master volume / balance / treble and bass (p/p) with a preamp bypass via the bass knob's push/pull function. The frequency range is 5 Hz to 50 kHz. The bass knob offers +18 dB boost at 40 Hz and the treble knob offers +18 dB boost at 4 kHz. Total harmonic distortion (THD) 0.18% at 1 kHz. Powered by a 9V battery that consumes 9 mA, the battery can last up to 870 hours. Input impedance is 1 mOhm, output impedance is 1 kOhm.pre-wired onboard bass preamp for MetroExpresssuitable for Modern and Verdine White Artist Line basseslefthand versionactive 2-way Electronic (boost only) for passive pickups4-knob layout with controls for master volume / balance / treble and bass (p/p)preamp bypass via Push/Pull function on bass knobcan be installed either on the control plate or through the electronics compartmentfrequency range: 5 Hz - 50 kHzbass knob offers +18 dB boost at 40 Hztreble knob offers +18 dB boost at 4 kHztotal harmonic distortion (THD) 0.18% at 1 kHzpowered by one 9V battery (Operating with 18V is not recommended, as this could destroy the circuit)power consumption: 9 mABattery life up to 870 hoursinput impedance: 1 mOhmoutput impedance: 1 kOhmNote: Defects or damage resulting from user error or improper installation resulting from the use of unsuitable accessories or tools are excluded from the guarantee. This includes any damage to the electronics or soldering points caused by the soldering iron being too hot and/or the use of incorrect soldering wire.

This Sadowsky MetroExpress pre-wired onboard bass preamp is suitable for left-hand Sadowsky MetroExpress Modern and Verdine White Artist Line basses. The V2 version is equipped with MEC potentiometers. It features active 2-way electronics (boost only) for passive pickups. The 4-knob layout has controls for master volume / balance / treble and bass (p/p) with a preamp bypass via the bass knob's push/pull function. The frequency range is 5 Hz to 50 kHz. The bass knob offers +18 dB boost at 40 Hz and the treble knob offers +18 dB boost at 4 kHz. Total harmonic distortion (THD) 0.18% at 1 kHz. Powered by a 9V battery that consumes 9 mA, the battery can last up to 870 hours. Input impedance is 1 mOhm, output impedance is 1 kOhm.pre-wired onboard bass preamp for Sadowsky MetroExpressV2 version, equipped with MEC potentiometerssuitable for Modern and Verdine White Artist Line basseslefthand versionactive 2-way Electronic (boost only) for passive pickups4-knob layout with controls for master volume / balance / treble and bass (p/p)preamp bypass via Push/Pull function on bass knobcan be installed either on the control plate or through the electronics compartmentfrequency range: 5 Hz - 50 kHzbass knob offers +18 dB boost at 40 Hztreble knob offers +18 dB boost at 4 kHztotal harmonic distortion (THD) 0.18% at 1 kHzpowered by one 9V battery (Operating with 18V is not recommended, as this could destroy the circuit)power consumption: 9 mABattery life up to 870 hoursinput impedance: 1 mOhmoutput impedance: 1 kOhmNote: Defects or damage resulting from user error or improper installation resulting from the use of unsuitable accessories or tools are excluded from the guarantee. This includes any damage to the electronics or soldering points caused by the soldering iron being too hot and/or the use of incorrect soldering wire.

This Sadowsky MetroExpress pre-wired onboard bass preamp is suitable for left-hand Sadowsky MetroExpress Vintage M-style basses. The V2 version is equipped with MEC potentiometers. It features active 2-way electronics (boost only) for passive pickups. The 3-knob layout has controls for master volume, treble and bass (p/p) with a preamp bypass via the bass knob's push/pull function. The frequency range is 5 Hz to 50 kHz. The bass knob offers +18 dB boost at 40 Hz and the treble knob offers +18 dB boost at 4 kHz. Total harmonic distortion (THD) 0.18% at 1 kHz. Powered by a 9V battery that consumes 9 mA, the battery can last up to 870 hours. Input impedance is 1 mOhm, output impedance is 1 kOhm.pre-wired onboard bass preamp for Sadowsky MetroExpressV2 version, equipped with MEC potentiometerssuitable for Vintage M-Style basslefthand versionactive 2-way Electronic (boost only) for passive pickups3 knob layout with controls for master volume / treble and bass (p/p)push/pull function on bass control for preamp bypass3-way mini-switch for pickup configuration (serial / parallel / single coil)frequency range 5 Hz - 50 kHzbass control offers +18 dB boost at 40 Hztreble control offers +18 dB boost at 4 kHztotal harmonic distortion (THD) 0.18% at 1 kHzpowered by one 9V battery (Operating with 18V is not recommended, as this could destroy the circuit)current draw 9 mAup to 870 hours battery lifeinput impedance 1 MOhmoutput impedance 1 kOhm-Note: Defects or damage resulting from culpable or improper installation as well as the use of unsuitable accessories or tools are excluded from the guarantee. This includes soldering points that are too hot, wrong soldering tin and the resulting damage to the electronics and soldering points.

This Sadowsky MetroExpress pre-wired onboard bass preamp is suitable for Sadowsky MetroExpress Ultra-Vintage P basses. It features active 2-way electronics (boost only) for passive pickups. The 3-knob layout has controls for master volume, treble and bass (p/p) with a preamp bypass via the bass knob's push/pull function. The frequency range is 5 Hz to 50 kHz. The bass knob offers +18 dB boost at 40 Hz and the treble knob offers +18 dB boost at 4 kHz. Total harmonic distortion (THD) 0.18% at 1 kHz. Powered by a 9V battery that consumes 9 mA, the battery can last up to 870 hours. Input impedance is 1 mOhm, output impedance is 1 kOhm.pre-wired onboard bass preamp for MetroExpresssuitable for Ultra Vintage P bassactive 2-way Electronic (boost only) for passive pickups3-knob layout with controls for master volume / treble and bass (p/p)preamp bypass via push/pull function on bass knobfrequency range: 5 Hz - 50 kHzbass knob offers +18 dB boost at 40 Hztreble knob offers +18 dB boost at 4 kHztotal harmonic distortion (THD) 0.18% at 1 kHzpowered by one 9V battery (Operating with 18V is not recommended, as this could destroy the circuit)power consumption: 9 mAbattery life up to 870 hoursinput impedance: 1 mOhmoutput impedance: 1 kOhmNote: Defects or damage resulting from user error or improper installation resulting from the use of unsuitable accessories or tools are excluded from the guarantee. This includes any damage to the electronics or soldering points caused by the soldering iron being too hot and/or the use of incorrect soldering wire.

This Sadowsky MetroExpress pre-wired onboard bass preamp is suitable for left-hand Sadowsky MetroExpress Ultra-Vintage P basses. It features active 2-way electronics (boost only) for passive pickups. The 3-knob layout has controls for master volume, treble and bass (p/p) with a preamp bypass via the bass knob's push/pull function. The frequency range is 5 Hz to 50 kHz. The bass knob offers +18 dB boost at 40 Hz and the treble knob offers +18 dB boost at 4 kHz. Total harmonic distortion (THD) 0.18% at 1 kHz. Powered by a 9V battery that consumes 9 mA, the battery can last up to 870 hours. Input impedance is 1 mOhm, output impedance is 1 kOhm.pre-wired onboard bass preamp for MetroExpresssuitable for Ultra Vintage P basslefthand versionactive 2-way Electronic (boost only) for passive pickups3-knob layout with controls for master volume / treble and bass (p/p)preamp bypass via push/pull function on bass knobfrequency range: 5 Hz - 50 kHzbass knob offers +18 dB boost at 40 Hztreble knob offers +18 dB boost at 4 kHztotal harmonic distortion (THD) 0.18% at 1 kHzpowered by one 9V battery (Operating with 18V is not recommended, as this could destroy the circuit)power consumption: 9 mAbattery life up to 870 hoursinput impedance: 1 mOhmoutput impedance: 1 kOhmNote: Defects or damage resulting from user error or improper installation resulting from the use of unsuitable accessories or tools are excluded from the guarantee. This includes any damage to the electronics or soldering points caused by the soldering iron being too hot and/or the use of incorrect soldering wire.

This Sadowsky pre-wired onboard bass preamp is suitable for Sadowsky MetroLine and MasterBuilt Vintage M-Style basses. It features active 2-way electronics (boost only) with RFIP (Radio Frequency Interference Protection) for passive pickups. The 4-knob layout has controls for master volume, Vintage Tone Control (VTC), treble and bass with a push/pull function for preamp bypass on the VTC knob and one 3-way mini-switch for pickup configuration (serial / parallel / single coil). The frequency range is 5 Hz to 50 kHz. The bass knob offers +18 dB boost at 40 Hz and the treble knob offers +18 dB boost at 4 kHz. Total harmonic distortion (THD) 0.18% at 1 kHz. Powered by a 9V battery that consumes 9 mA, the battery can last up to 870 hours. Input impedance is 1 mOhm, output impedance is 1 kOhm.pre-wired onboard bass preamp for MetroLine & MasterBuiltsuitable for Vintage M-Style bassactive 2-way Electronic (boost only) with RFIP (Radio Frequency Interference Protection) for passive pickups4-knob layout with controls for master Volume / VTC tone control (p/p) / treble and bassMEC potentiometerpassive tone control on the Vintage Tone Control knob (VTC)push/pull function on the VTC control for preamp bypass3-way mini-switch for pickup configuration (serial / parallel / single coil)frequency range 5 Hz - 50 kHzbass control offers +18 dB boost at 40 Hztreble control offers +18 dB boost at 4 kHztotal harmonic distortion (THD) 0.18% at 1 kHzpowered by one 9V battery (Operating with 18V is not recommended, as this could destroy the circuit)current draw 9 mAup to 870 hours battery lifeinput impedance 1 MOhmoutput impedance 1 kOhmNote: Defects or damage resulting from culpable or improper installation as well as the use of unsuitable accessories or tools are excluded from the guarantee. This includes soldering points that are too hot, wrong soldering tin and the resulting damage to the electronics and soldering points.

This Sadowsky pre-wired onboard bass preamp is suitable for Sadowsky MetroLine and MasterBuilt Ultra-Vintage P basses. It features active 2-way electronics (boost only) with RFIP (Radio Frequency Interference Protection) for passive pickups. The 3-knob layout has controls for master volume, Vintage Tone Control (VTC), treble and bass (stacked) with a push/pull function for preamp bypass on the VTC knob. The frequency range is 5 Hz to 50 kHz. The bass knob offers +18 dB boost at 40 Hz and the treble knob offers +18 dB boost at 4 kHz. Total harmonic distortion (THD) 0.18% at 1 kHz. Powered by a 9V battery that consumes 9 mA, the battery can last up to 870 hours. Input impedance is 1 mOhm, output impedance is 1 kOhm.pre-wired onboard bass preamp for MetroLine & MasterBuiltsuitable for Ultra Vintage P bassactive 2-way Electronic (boost only) with RFIP (Radio Frequency Interference Protection) for passive pickups3-knob layout with controls for master volume / VTC tone control (p/p) / treble and bass (stacked)MEC potentiometerpassive tone control on the Vintage Tone Control knob (VTC)preamp bypass via push/pull function on VTC knobfrequency range: 5 Hz - 50 kHzbass knob offers +18 dB boost at 40 Hztreble knob offers +18 dB boost at 4 kHztotal harmonic distortion (THD) 0.18% at 1 kHzpowered by one 9V battery (Operating with 18V is not recommended, as this could destroy the circuit)power consumption: 9 mAbattery life up to 870 hoursinput impedance: 1 mOhmoutput impedance: 1 kOhmNote: Defects or damage resulting from user error or improper installation resulting from the use of unsuitable accessories or tools are excluded from the guarantee. This includes any damage to the electronics or soldering points caused by the soldering iron being too hot and/or the use of incorrect soldering wire.

This Sadowsky pre-wired onboard bass preamp is suitable for left-hand Sadowsky MetroLine and MasterBuilt Ultra-Vintage P basses. It features active 2-way electronics (boost only) with RFIP (Radio Frequency Interference Protection) for passive pickups. The 3-knob layout has controls for master volume, Vintage Tone Control (VTC), treble and bass (stacked) with a push/pull function for preamp bypass on the VTC knob. The frequency range is 5 Hz to 50 kHz. The bass knob offers +18 dB boost at 40 Hz and the treble knob offers +18 dB boost at 4 kHz. Total harmonic distortion (THD) 0.18% at 1 kHz. Powered by a 9V battery that consumes 9 mA, the battery can last up to 870 hours. Input impedance is 1 mOhm, output impedance is 1 kOhm.pre-wired onboard bass preamp for MetroLine & MasterBuiltsuitable for Ultra Vintage P basslefthand versionactive 2-way Electronic (boost only) with RFIP (Radio Frequency Interference Protection) for passive pickups3-knob layout with controls for master volume / VTC tone control (p/p) / treble and bass (stacked)MEC potentiometerpassive tone control on the Vintage Tone Control knob (VTC)preamp bypass via push/pull function on VTC knobfrequency range: 5 Hz - 50 kHzbass knob offers +18 dB boost at 40 Hztreble knob offers +18 dB boost at 4 kHztotal harmonic distortion (THD) 0.18% at 1 kHzpowered by one 9V battery (Operating with 18V is not recommended, as this could destroy the circuit)power consumption: 9 mAbattery life up to 870 hoursinput impedance: 1 mOhmoutput impedance: 1 kOhmNote: Defects or damage resulting from user error or improper installation resulting from the use of unsuitable accessories or tools are excluded from the guarantee. This includes any damage to the electronics or soldering points caused by the soldering iron being too hot and/or the use of incorrect soldering wire.

This Sadowsky pre-wired onboard bass preamp is suitable for Sadowsky MetroLine and MasterBuilt Standard J/J, Hybrid P/J and Verdine White Artist Line basses. It features active 2-way electronics (boost only) with RFIP (Radio Frequency Interference Protection) for passive pickups. The 4-knob layout has controls for master volume, balance, Vintage Tone Control (VTC), treble and bass (stacked) with a push/pull function for preamp bypass on the VTC knob. The frequency range is 5 Hz to 50 kHz. The bass knob offers +18 dB boost at 40 Hz and the treble knob offers +18 dB boost at 4 kHz. Total harmonic distortion (THD) 0.18% at 1 kHz. Powered by a 9 V battery that consumes 9 mA, the battery can last up to 870 hours. Input impedance is 1 mOhm, output impedance is 1 kOhm.pre-wired onboard bass preamp for MetroLine & MasterBuiltsuitable for Standard J/J, Hybrid P/J and Verdine White Artist Line bassesactive 2-way Electronic (boost only) with RFIP (Radio Frequency Interference Protection) for passive pickups4-knob layout with controls for master volume / balance / VTC tone control (p/p) / treble and bass (stacked)MEC potentiometerpassive tone control on the Vintage Tone Control knob (VTC)push/pull function on the VTC knob for preamp bypasscan be installed either on the control plate or through the electronics compartmentfrequency range: 5 Hz - 50 kHzbass knob offers +18 dB boost at 40 Hztreble knob offers +18 dB boost at 4 kHztotal harmonic distortion (THD) 0.18% at 1 kHzpowered by one 9V battery (Operating with 18V is not recommended, as this could destroy the circuit)power consumption: 9 mAbattery life up to 870 hoursinput impedance: 1 mOhmoutput impedance: 1 kOhmNote: Defects or damage resulting from user error or improper installation resulting from the use of unsuitable accessories or tools are excluded from the guarantee. This includes any damage to the electronics or soldering points caused by the soldering iron being too hot and/or the use of incorrect soldering wire.

This Sadowsky pre-wired onboard bass preamp is suitable for Sadowsky MetroLine and MasterBuilt Vintage J/J and Vintage P/J basses. It features active 2-way electronics (boost only) with RFIP (Radio Frequency Interference Protection) for passive pickups. The 4-knob layout has controls for master volume, balance, Vintage Tone Control (VTC), treble and bass (stacked) with a push/pull function for preamp bypass on the VTC knob. The frequency range is 5 Hz to 50 kHz. The bass knob offers +18 dB boost at 40 Hz and the treble knob offers +18 dB boost at 4 kHz. Total harmonic distortion (THD) 0.18% at 1 kHz. Powered by a 9V battery that consumes 9 mA, the battery can last up to 870 hours. Input impedance is 1 mOhm, output impedance is 1 kOhm.pre-wired onboard bass preamp for MetroLine & MasterBuiltsuitable for Vintage J/J and Vintage P/J bassesassembled on control plateactive 2-way Electronic (boost only) with RFIP (Radio Frequency Interference Protection) for passive pickups4-knob layout with controls for master volume / balance / VTC tone control (p/p) / treble and bass (stacked)MEC potentiometerpassive tone control on the Vintage Tone Control knob (VTC)push/pull function on the VTC knob for preamp bypasscan be installed either on the control plate or through the electronics compartmentfrequency range: 5 Hz - 50 kHzbass knob offers +18 dB boost at 40 Hztreble knob offers +18 dB boost at 4 kHztotal harmonic distortion (THD) 0.18% at 1 kHzpowered by one 9V battery (Operating with 18V is not recommended, as this could destroy the circuit)power consumption: 9 mAbattery life up to 870 hoursinput impedance: 1 mOhmoutput impedance: 1 kOhmNote: Defects or damage resulting from user error or improper installation resulting from the use of unsuitable accessories or tools are excluded from the guarantee. This includes any damage to the electronics or soldering points caused by the soldering iron being too hot and/or the use of incorrect soldering wire.

This Sadowsky pre-wired onboard bass preamp is suitable for Sadowsky MetroLine and MasterBuilt Modern Basses with Soapbar pickups. It features active 2-way electronics (boost only) with RFIP (Radio Frequency Interference Protection) for passive pickups. The 4-knob layout has controls for master volume, balance, Vintage Tone Control (VTC), treble and bass (stacked) with a push/pull function for preamp bypass on the VTC knob. The frequency range is 5 Hz to 50 kHz. The bass knob offers +18 dB boost at 40 Hz and the treble knob offers +18 dB boost at 4 kHz. Total harmonic distortion (THD) 0.18% at 1 kHz. Powered by a 9 V battery that consumes 9 mA, the battery can last up to 870 hours. Input impedance is 1 mOhm, output impedance is 1 kOhm.pre-wired onboard bass preamp for MetroLine & MasterBuiltsuitable for 24-fret Modern Bass models with Soapbar pickupsactive 2-way Electronic (boost only) with RFIP (Radio Frequency Interference Protection) for passive pickups4-knob layout with controls for master volume / balance / VTC tone control (p/p) / treble and bass (stacked)MEC potentiometerpassive tone control on the Vintage Tone Control knob (VTC), modified with 0.1 µF capacitor for better treble roll-off with Soapbar pickupspush/pull function on the VTC knob for preamp bypasscan be installed either on the control plate or through the electronics compartmentfrequency range: 5 Hz - 50 kHzbass knob offers +18 dB boost at 40 Hztreble knob offers +18 dB boost at 4 kHztotal harmonic distortion (THD) 0.18% at 1 kHzpowered by one 9V battery (Operating with 18V is not recommended, as this could destroy the circuit)power consumption: 9 mAbattery life up to 870 hoursinput impedance: 1 mOhmoutput impedance: 1 kOhmNote: Defects or damage resulting from user error or improper installation resulting from the use of unsuitable accessories or tools are excluded from the guarantee. This includes any damage to the electronics or soldering points caused by the soldering iron being too hot and/or the use of incorrect soldering wire.

This Sadowsky pre-wired onboard bass preamp is suitable for left-hand Sadowsky MetroLine and MasterBuilt Single Cut basses with Soapbar pickups. It features active 2-way electronics (boost only) with RFIP (Radio Frequency Interference Protection) for passive pickups. The 4-knob layout has controls for master volume, balance, Vintage Tone Control (VTC), treble and bass (stacked) with a push/pull function for preamp bypass on the VTC knob and a mini switch for mid-boost activation. The circuit board offers 4 mids adjustments: 500Hz Narrow, 500Hz Wide, 800Hz Narrow and 800Hz Wide, plus midrange boost volume adjustment via 2 trimpots located on the circuit board. The frequency range is 5 Hz to 50 kHz. The bass knob offers +18 dB boost at 40 Hz and the treble knob offers +18 dB boost at 4 kHz. Total harmonic distortion (THD) 0.18% at 1 kHz. Powered by a 9 V battery that consumes 9 mA, the battery can last up to 870 hours. Input impedance is 1 mOhm, output impedance is 1 kOhm. This item is only available as a direct replacement part for your Sadowsky MasterBuilt or MetroLine Single Cut bass models. Proof of ownership is required. Please contact us for more information. As an alternative, we offer the following Sadowsky onboard electronics. These are similar to the original electronics in terms of both function and equipment, and can be ordered without restrictions: • SAC ELE OBOARD MB4K: Sadowsky Onboard Bass Preamp mit 500 Hz Mid-Boost (4-Knopf-System, montiert auf Kontrollplatte) • SAC ELE OBOARD MB4KL: Sadowsky Onboard Bass Preamp mit 500 Hz Mid-Boost (4-Knopf-System, montiert auf Kontrollplatte, Lefthand) • SAC ELE OBOARD MB4F: Sadowsky Onboard Bass Preamp mit 500 Hz Mid-Boost (4-Knopf-System, ohne Kontrollplatte) • SAC ELE OBOARD MB4FL: Sadowsky Onboard Bass Preamp mit 500 Hz Mid-Boost (4-Knopf-System, ohne Kontrollplatte, Lefthand)pre-wired onboard bass preamp for MetroLine & MasterBuiltsuitable for 24-Fret Single Cut Bass models with Soapbar pickupsactive 2-way Electronic (boost only) with mid-range boost and RFIP (Radio Frequency Interference Protection) for passive pickupslefthand version4-knob layout with controls for master volume / balance / VTC tone control (p/p) / treble and bass (stacked)MEC potentiometermid-boost activation via mini switch locatedpassive tone control on the Vintage Tone Control knob (VTC), modified with 0.1 µF capacitor for better treble roll-off with Soapbar pickupspush/pull function on the VTC knob for preamp bypassfrequency range: 5 Hz - 50 kHzbass knob offers +18 dB boost at 40 Hztreble knob offers +18 dB boost at 4 kHztotal harmonic distortion (THD) 0.18% at 1 kHz4 possible mids adjustments on the circuit board:500Hz - Narrow500Hz - Wide (recommended default setting)800Hz - Narrow800Hz - Widemidrange boost volume adjustment via 2 trimpots located on the circuit boardpowered by one 9V battery (Operating with 18V is not recommended, as this could destroy the circuit)power consumption: 9 mAbattery life up to 870 hoursinput impedance: 1 mOhmoutput impedance: 1 kOhmNote: Defects or damage resulting from user error or improper installation resulting from the use of unsuitable accessories or tools are excluded from the guarantee. This includes any damage to the electronics or soldering points caused by the soldering iron being too hot and/or the use of incorrect soldering wire.

This Sadowsky pre-wired onboard bass preamp is suitable for Sadowsky MetroLine and MasterBuilt Standard Will Lee Artist Line basses. It features active 2-way electronics (boost only) with RFIP (Radio Frequency Interference Protection) for passive pickups. The 4-knob layout has controls for master volume, balance, Vintage Tone Control (VTC), treble and bass (stacked) with a push/pull function for preamp bypass on the VTC knob and a mini switch for mid-boost activation. The circuit board offers 4 mids adjustments: 500Hz Narrow, 500Hz Wide, 800Hz Narrow and 800Hz Wide, plus midrange boost volume adjustment via 2 trimpots located on the circuit board. The frequency range is 5 Hz to 50 kHz. The bass knob offers +18 dB boost at 40 Hz and the treble knob offers +18 dB boost at 4 kHz. Total harmonic distortion (THD) 0.18% at 1 kHz. Powered by a 9 V battery that consumes 9 mA, the battery can last up to 870 hours. Input impedance is 1 mOhm, output impedance is 1 kOhm. This item is only available as a direct replacement part for your Sadowsky MasterBuilt or MetroLine Will Lee Artist Line or Single Cut bass models. Proof of ownership is required. Please contact us for more information.As an alternative, we offer the following Sadowsky onboard electronics. These are similar to the original Will Lee electronics in terms of both function and equipment, and can be ordered without restrictions: • SAC ELE OBOARD MB4K: Sadowsky Onboard Bass Preamp mit 500 Hz Mid-Boost (4-Knopf-System, montiert auf Kontrollplatte) • SAC ELE OBOARD MB4KL: Sadowsky Onboard Bass Preamp mit 500 Hz Mid-Boost (4-Knopf-System, montiert auf Kontrollplatte, Lefthand) • SAC ELE OBOARD MB4F: Sadowsky Onboard Bass Preamp mit 500 Hz Mid-Boost (4-Knopf-System, ohne Kontrollplatte) • SAC ELE OBOARD MB4FL: Sadowsky Onboard Bass Preamp mit 500 Hz Mid-Boost (4-Knopf-System, ohne Kontrollplatte, Lefthand)pre-wired onboard bass preamp for MetroLine & MasterBuiltsuitable for Standard Will Lee Artist Line bassesactive 2-way Electronic (boost only) with mid-range boost and RFIP (Radio Frequency Interference Protection) for passive pickups4-knob layout with controls for master volume / balance / VTC tone control (p/p) / treble and bass (stacked)MEC potentiometermid-boost activation via mini switch locatedpassive tone control on the Vintage Tone Control knob (VTC)push/pull function on the VTC knob for preamp bypassfrequency range: 5 Hz - 50 kHzbass knob offers +18 dB boost at 40 Hztreble knob offers +18 dB boost at 4 kHztotal harmonic distortion (THD) 0.18% at 1 kHz4 possible mids adjustments on the circuit board:500Hz - Narrow500Hz - Wide (recommended default setting)800Hz - Narrow800Hz - Widemidrange boost volume adjustment via 2 trimpots located on the circuit boardpowered by one 9V battery (Operating with 18V is not recommended, as this could destroy the circuit)power consumption: 9 mAbattery life up to 870 hoursinput impedance: 1 mOhmoutput impedance: 1 kOhmNote: Defects or damage resulting from user error or improper installation resulting from the use of unsuitable accessories or tools are excluded from the guarantee. This includes any damage to the electronics or soldering points caused by the soldering iron being too hot and/or the use of incorrect soldering wire.

This Sadowsky pre-wired onboard bass preamp is suitable for left-hand Sadowsky MetroLine and MasterBuilt Standard Will Lee Artist Line basses. It features active 2-way electronics (boost only) with RFIP (Radio Frequency Interference Protection) for passive pickups. The 4-knob layout has controls for master volume, balance, Vintage Tone Control (VTC), treble and bass (stacked) with a push/pull function for preamp bypass on the VTC knob and a mini switch for mid-boost activation. The circuit board offers 4 mids adjustments: 500Hz Narrow, 500Hz Wide, 800Hz Narrow and 800Hz Wide, plus midrange boost volume adjustment via 2 trimpots located on the circuit board. The frequency range is 5 Hz to 50 kHz. The bass knob offers +18 dB boost at 40 Hz and the treble knob offers +18 dB boost at 4 kHz. Total harmonic distortion (THD) 0.18% at 1 kHz. Powered by a 9 V battery that consumes 9 mA, the battery can last up to 870 hours. Input impedance is 1 mOhm, output impedance is 1 kOhm. This item is only available as a direct replacement part for your Sadowsky MasterBuilt or MetroLine Will Lee Artist Line or Single Cut bass models. Proof of ownership is required. Please contact us for more information. • SAC ELE OBOARD MB4K: Sadowsky Onboard Bass Preamp mit 500 Hz Mid-Boost (4-Knopf-System, montiert auf Kontrollplatte) • SAC ELE OBOARD MB4KL: Sadowsky Onboard Bass Preamp mit 500 Hz Mid-Boost (4-Knopf-System, montiert auf Kontrollplatte, Lefthand) • SAC ELE OBOARD MB4F: Sadowsky Onboard Bass Preamp mit 500 Hz Mid-Boost (4-Knopf-System, ohne Kontrollplatte) • SAC ELE OBOARD MB4FL: Sadowsky Onboard Bass Preamp mit 500 Hz Mid-Boost (4-Knopf-System, ohne Kontrollplatte, Lefthand)pre-wired onboard bass preamp for MetroLine & MasterBuiltsuitable for Standard Will Lee Artist Line basseslefthand versionactive 2-way Electronic (boost only) with mid-range boost and RFIP (Radio Frequency Interference Protection) for passive pickups4-knob layout with controls for master volume / balance / VTC tone control (p/p) / stacked treble and bassMEC potentiometermid-boost activation via mini switch locatedpassive tone control on the Vintage Tone Control knob (VTC)push/pull function on the VTC knob for preamp bypassfrequency range: 5 Hz - 50 kHzbass knob offers +18 dB boost at 40 Hztreble knob offers +18 dB boost at 4 kHztotal harmonic distortion (THD) 0.18% at 1 kHz4 possible mids adjustments on the circuit board: 500Hz - Narrow 500Hz - Wide (recommended default setting) 800Hz - Narrow 800Hz - Widemidrange boost volume adjustment via 2 trimpots located on the circuit boardpowered by one 9V battery (Operating with 18V is not recommended, as this could destroy the circuit)power consumption: 9 mAbattery life up to 870 hoursinput impedance: 1 mOhmoutput impedance: 1 kOhmNote: Defects or damage resulting from user error or improper installation resulting from the use of unsuitable accessories or tools are excluded from the guarantee. This includes any damage to the electronics or soldering points caused by the soldering iron being too hot and/or the use of incorrect soldering wire.

This Sadowsky pre-wired onboard bass preamp is suitable for Sadowsky MetroLine and MasterBuilt Will Lee Artist Line and Vintage Single Cut basses. It features active 2-way electronics (boost only) with RFIP (Radio Frequency Interference Protection) for passive pickups. The 4-knob layout has controls for master volume, balance, Vintage Tone Control (VTC), treble and bass (stacked) with a push/pull function for preamp bypass on the VTC knob and a mini switch for mid-boost activation. The circuit board offers 4 mids adjustments: 500Hz Narrow, 500Hz Wide, 800Hz Narrow and 800Hz Wide, plus midrange boost volume adjustment via 2 trimpots located on the circuit board. The frequency range is 5 Hz to 50 kHz. The bass knob offers +18 dB boost at 40 Hz and the treble knob offers +18 dB boost at 4 kHz. Total harmonic distortion (THD) 0.18% at 1 kHz. Powered by a 9 V battery that consumes 9 mA, the battery can last up to 870 hours. Input impedance is 1 mOhm, output impedance is 1 kOhm. This item is only available as a direct replacement part for your Sadowsky MasterBuilt or MetroLine Will Lee Artist Line or Single Cut bass models. Proof of ownership is required. Please contact us for more information. • SAC ELE OBOARD MB4K: Sadowsky Onboard Bass Preamp mit 500 Hz Mid-Boost (4-Knopf-System, montiert auf Kontrollplatte) • SAC ELE OBOARD MB4KL: Sadowsky Onboard Bass Preamp mit 500 Hz Mid-Boost (4-Knopf-System, montiert auf Kontrollplatte, Lefthand) • SAC ELE OBOARD MB4F: Sadowsky Onboard Bass Preamp mit 500 Hz Mid-Boost (4-Knopf-System, ohne Kontrollplatte) • SAC ELE OBOARD MB4FL: Sadowsky Onboard Bass Preamp mit 500 Hz Mid-Boost (4-Knopf-System, ohne Kontrollplatte, Lefthand)pre-wired onboard bass preamp for MetroLine & MasterBuiltsuitable for Will Lee Artist Line and Vintage Single Cut bassesassembled on control plateactive 2-way Electronic (boost only) with mid-range boost and RFIP (Radio Frequency Interference Protection) for passive pickups4-knob layout with controls for master volume / balance / VTC tone control (p/p) / treble and bass (stacked)mid-boost activation via mini switch located on control plateMEC potentiometercan be installed either on the control plate or through the electronics compartmentpassive tone control on the Vintage Tone Control knob (VTC)push/pull function on the VTC knob for preamp bypassfrequency range: 5 Hz - 50 kHzbass knob offers +18 dB boost at 40 Hztreble knob offers +18 dB boost at 4 kHztotal harmonic distortion (THD) 0.18% at 1 kHz4 possible mids adjustments on the circuit board: 500Hz - Narrow 500Hz - Wide (recommended default setting) 800Hz - Narrow 800Hz - Widemidrange boost volume adjustment via 2 trimpots located on the circuit boardpowered by one 9V battery (Operating with 18V is not recommended, as this could destroy the circuit)power consumption: 9 mAbattery life up to 870 hoursinput impedance: 1 mOhmoutput impedance: 1 kOhmNote: Defects or damage resulting from user error or improper installation resulting from the use of unsuitableaccessories or tools are excluded from the guarantee. This includes any damage to the electronics or soldering points caused by the soldering iron being too hot and/or the use of incorrect soldering wire.