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The Bassbone OD from Radial Engineering is a bass preamp with two instrument input channels, each of which is fully equipped with a level control, a passive-interactive EQ, and a low-frequency filter to help eliminate resonance. Channel-A is equipped with a PZB booster switch that increases the sensitivity and load to 10 MOhms to optimize it for use with piezo transducers as commonly used on upright bass. Channel-B is equipped with Drag Control load correction to optimize the tone and feel when using a passive instrument such as a vintage Fender bass. Toggling between channels is done using a footswitch. When using a dual pickup system, both channels may be mixed together by depressing the blend switch. Outputs include a 1/4" instrument level output to feed the artist's on-stage amplifier, plus a balanced low-Z Radial DI box output to feed the PA system. The XLR output can be assigned pre or post effects to suit your preference. A separately buffered tuner output works with the mute footswitch for quiet on-stage tuning.
If you use effects, both input channels can share the same pedals by connecting via the built-in send & receive effects loop. This is augmented with an on-board bass overdrive with control over the drive level and tone. The OD footswitch may be assigned to the loop, overdrive, or both. The Bassbone also features a built-in headphone amp with 3.5mm output.
Toggle between any two basses with ease
Bass overdrive with wet-dry control for extra grit
Drag control load correction for vintage basses
PZB booster and 10 meg piezo input for upright
In the Box
Tonebone Bassbone OD 2-Channel Bass Preamp
Limited 3-Year Transferable Warranty
Table of Contents
Audio Circuit Type
Discrete class-A FET input with low noise ICs
20 Hz - 18 kHz
Total Harmonic Distortion
0.05% @ -15 dBu
0.2% @ -20 dBu
Input A: 220 kOhms / 10 MOhms
Input B: Variable from 22 kOhms to 1.8 MOhms
300 ohms at XLR
Unity gain device
Boost Drive: 0 to 25 dB
PZB Boost: +10 dB on channel A
Output Clip Level
+10 dBu at XLR
Equivalent Input Noise
-92 dBu at XLR
1/4" Output High-Z instrument-level
3.5 mm output Headphone, mono with volume control
XLR output, balanced mic level, AES standard (pin-2 hot)
2 x Gain
2 x Low
2 x Mid
2 x High
1 x Drive
1 x Mix
1 x Tone in OD
1 x Drag
1 x PZB
1 x Blend
1 x FX 180
1 x XLR G/L & 180
1 x LOOP Mode
1 x EFX Mode
2 x HPF
2 x Mid Frequency
Flat, 80 Hz and 150 Hz
Filter Type (Slope)
6 dB / octave
Recessed Blend switch mixes ch-1 & ch-2 together
Pin 1 Ground
Pin 2 +
Pin 3 -
Lifts pin-1 on the XLR
+15 VDC / 400 mA (adapter included)
Humidity: Dry locations
Temperature: 41 to 104°F (5 to 40°C)