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Sadowsky Bass Guitar Pre-Amps


Nordstrand | East | Tone styler | Creation audio | Delano | 3 Leaf | >Sadowsky

Glockenklang | Aguilar | Bartolini | Darkglass | HazLabs | Markbass


SPB-1 Preamp Pedal    £240 free UK shipping

SPB-2 Preamp Pedal    £169 free UK shipping

4 Knob Onboard preamp    £145 free UK shipping

VTC Retrofit kit   £85 free UK shipping


Both of our pedal preamps are perfect for vintage basses where installation of an onboard preamp would affect the instrument’s original condition and resale value. Also recommended for all passive basses, basses with active pickups, and instruments that have active electronics that can be bypassed. It also works great with all upright bass pickups.

  1. SPB-1 Preamp/DI Pedal: Our fully featured preamp pedal: XLR DI out, preamp bypass footswitch (on/off), a mute footswitch, and a live tuner out. Also includes a ground lift switch for the DI and a low battery indicator LED.

  2. SBP-2 Preamp Pedal: The same famous circuit as the Preamp/DI pedal—but with a slimmed down design and smaller footprint perfect for crammed pedalboards. 


What’s the difference between the SBP-1 and SBP-2?: The SBP-1 is physically bigger and has more features like an XLR DI output to plug directly into a soundboard live or in the studio. It also has a second footswitch to mute your signal completely between songs or during and instrument change and a tuner out jack to keep your tuner out of your signal chain. The SBP-2 has the same preamp circuit but is more like a traditional stomp box with just an in and out jack and a slimmed down enclosure—geared more towards players with smaller pedalboards.




SBP-2 Preamp Pedal

Our famous preamp pedal, in a smaller footprint!

At NAMM 2017, we released a new version of our popular preamp pedal. The new SBP-2 has the same famous circuit that goes in all Sadowsky basses—just like the original Sadowsky Preamp/DI pedal—but with a slimmed down design and smaller footprint that is perfect for crammed pedalboards and vintage basses where onboard preamp installation would affect resale value. It works with all passive basses, active pickups, and upright bass pickups. 


Sadowsky Bass Preamp Specs:

  1. Frequency Response: 5Hz-50 kHz

  2. Power Source: 9V Battery or AC adapter

  3. Battery draw: Around 3mA

  4. Battery Life: 150 Hours

  5. Bass Control: + 18dB Boost @ 40Hz

  6. Treble Control: + 18dB Boost @ 4kHz

  7. Total Harmonic Distortion: 0.18% @ 1kHz

  8. Output Impedance: 1K Ohm

  9. Actual pedal size: 2.4″ x 4.4″ x 1.3″


















SBP-1 Preamp/DI Pedal

The Sadowsky SBP-1 Outboard Bass Preamp/DI Pedal contains the same famous circuit built into every Sadowsky bass.

Housed in a small footpedal box for use on the floor, it measures just 4.5″ x 4.5″ x 2.25″ and weighs 1.5 pounds.  Just plug your bass into the box and then go from the box to your amp, and/or direct to the board.

Controls consist of volume, treble boost, and bass boost.  Footswitches include preamp bypass and a mute switch with a live tuner out.  Other features: ground lift switch for the DI and a low battery indicator LED.

The Preamp/DI Pedal is perfect for vintage basses where installation of an onboard preamp would affect the instrument’s original condition and resale value.  The Preamp/DI pedal is recommended for all passive basses, basses with active pickups, and instruments that have active electronics that can be bypassed.  It also works great with all upright bass pickups.

We offer an AC adaptor for 120V and 220V.

  1. Frequency Response: 5Hz-50 kHz

  2. Power Source: 9V Battery or AC adapter

  3. Battery draw: Around 9mA

  4. Battery Life: 50 Hours

  5. Bass Control: + 18dB Boost @ 40Hz

  6. Treble Control: + 18dB Boost @ 4kHz

  7. Total Harmonic Distortion: 0.18% @ 1kHz

  8. Output Impedance: XLR out: 600 Ohm, Tuner out:1K Ohm, 1/4” out: 12K

  9. Actual pedal size: 4.2″ x 4.2″ x 1.7″

  10. Weight: 1.5 lbs



Sadowsky Onboard Bass Preamp 4-Knob



The Sadowsky 4 knob Onboard Bass Preamp is a completely prewired system offering the same controls and preamp as all Sadowsky Basses.


Volume-Pan-VTC-Treble/Bass


VTC=Vintage Tone Control (pull up for total bypass).


The preamp can be installed with the included control plate or mounted through a rear control cavity in either a 4 in line or diamond pattern.  Pickups attach via solderless connectors at the pan pot.  Direction of the pan pot can be easily reversed by which pickup terminals are used.


Installation requires a side jack and a battery compartment. We recommend shielding the control cavity and pickup cavities at the time of installation.  We recommend installation by a professional guitar technician or builder if routing and drilling for a battery compartment and/or side jack is required.


This system is not compatible with EMG or any other active pickups requiring anything other than a 250K or 500K volume pot.



Sadowsky Onboard Bass Preamp 3-Knob


For the first time, our preamp is available as a prewired drop-in for J style basses WITHOUT a side jack. No soldering required for installation.

It has been designed for minimally invasive installation on most J-bass style instruments.  The only modification required is a battery compartment, which can be hidden under a pickguard or routed in the back of the instrument.

The 3-knob Onboard Bass Preamp can be installed with the included control plate or easily transferred to another control plate or pickguard or installed in a rear control cavity.

Controls are vol/pan/treble-bass. Pulling up on the volume control bypasses the preamp for passive operation.

Pickups attach via solderless connectors at the pan pot.  Direction of the pan pot can be easily reversed by which pickup terminals are used.


We recommend shielding the control cavity and pickup cavities at the time of installation.  We also recommend installation by a professional guitar technician or builder if routing and drilling for a battery compartment is required.


This system is not compatible with EMG or any other active pickups requiring anything other than a 250K or 500K volume pot.  For these applications, please custom order a parts only preamp kit and use your original volume pot.



The Vintage Tone Control (VTC) Retrofit Kit is the the perfect upgrade for older Sadowsky models and new MetroExpress basses that only have separate treble and bass controls.


The VTC Retrofit Kit includes a stacked potentiometer for treble and bass, a push/pull potentiometer for the passive tone control and preamp bypass 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.