Sadowsky Onboard Bass Preamp 4-Knob
- prewired onboard bass preamp for J-style basses with metal control plate
- active preamp for passive pickups
- 4-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 bypass
- can be installed either with the included control plate or mounted through a rear control cavity
- frequency response 5 Hz - 50 kHz
- Bass control offers +18 dB boost at 40 Hz
- Treble control offers +18 dB boost at 4 kHz
- total harmonic distortion (THD) 0.18% at 1 kHz
- power supply via one 9V battery
- current draw 9 mA
- up to 870 hours battery life
- input impedance 1 Mohm
- output impedance 1 kohm
