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Dr Ultimate Acoustic Sound Tool Kit. Get a flawless signal for your instruments with the Radial Tonebone PZ-Pre acoustic pre-amp. This is the most powerful acoustic preamp plugged into a pedal. This makes it perfect for guitars to violins, mandolins to cellos and everything in between. And with two channels onboard, you can switch and crossfade your instruments with the push of a button.


  • Switch or mix instruments with two channels on board
  • Quickly eliminate feedback with notch and resonance filters
  • Perfect for PA and monitors with pre and radial post DI outputs
  • Easy to control on stage via power booster and mute functions
  • Add gain for solos with the 8dB boost control
  • Choose your tone thanks to a 3-band semi-parametric EQ
  • Total control of input volume on each channel
  • Eliminate phase problems with the reversing switch
  • Assign your boost switch to boost, effects loop, or both using the footswitch switch
  • Tame unbridled low frequencies with the three-stage Lo-Cut filter
  • Perfect for instruments equipped with piezo actuators thanks to the class A booster PZB-2
  • Inserting effects into the signal path via loop/send-return
  • Remove hum and buzz caused by ground loops with the lift switch
  • Connect the device directly to your tuner via the buffered ¼" output.
  • Robust construction for damage-free transport
  • Compact design can be integrated into almost any pedalboard setup


  • Inputs: 6.3mm jack unbalanced
  • Input impedance: Normal 6.8k Ohm, Piezo 10Meg Ohm
  • PZB buffer: +10dB increase
  • Low pass filter: 75Hz/220Hz
  • Notch filter area: 56Hz - 330Hz
  • Notch Q: -8dB / -15dB
  • Low EQ: Shelf type +/-12dB (75Hz)
  • High EQ: Shelf type +/-12dB (7.5kHz)
  • Medium EQ: Semi-parametric +/-12dB (82Hz - 5.6kHz)
  • Performance increase: Unity gain to +12dB max.
  • Effect loop: 6.3mm jack unbalanced, send 1k ohm / return 15k ohm
  • Switch: FET circuit
  • Output (instrument): 6.3mm jack unbalanced, 1k ohm output impedance
  • Tuner output: 6.3mm jack unbalanced, 6.8k ohm output impedance
  • Pre-EQ output: XLR, balanced, 600 ohm, microphone level
  • Post-EQ output: XLR, balanced, 600 ohm, microphone level
  • XLR pin out: Pin 1 ground Pin 2 hot (+) Pin 3 cold (-)
  • Power supply: 15VDC, 400mA (supplied), center pin positive
  • Dimensions: 203mm (W) x 108mm (D) x 35mm (H)

*Exhibition piece (small scratches on the underside)