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Bastl Instruments BUDDY Preamp stereo mixer

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Buddy is a four-channel eurorack stereo mixer optimized for hybrid setups. Channels A and B are optimized for eurorack sources (either mono or stereo) with a slight boost (×2 / +6dB). Channels C and D are line-level pre-amps that can boost the signal up to ×10 / +20dB and feature stereo TRS jack inputs for directly connecting desktop units without further adaptors. All channels feature a clean boost via the high-quality, low-noise NE5532 op-amp (same as on the Dude), which delivers smooth overdrive - that can be used to overdrive clean stereo signals. Several Buddy mixers can be chained via jumper cables on the back to expand the number of channels without losing precious inputs.

Setup examples:

  • Use your eurorack as an effects processor! Buddy will boost your desktop gear to correct levels and be your perfect aux send mixer.
  • Use Buddy as a stereo mixdown module for all your stereo/mono voices.
  • Use external stereo sound processors with eurorack voices. Buddy will boost their levels back to modular levels.
  • Use the Buddy stereo mixdown attenuator to lower the level for line-level devices.


  • Channels A and B:
    — DC coupled
    — 100k input impedance
    — gain ×2 / +6dB,
    — left input normalized to right channel
  • Channels C and D:
    — AC coupled
    — 10k input impedance
    — gain ×10 / +20dB
    — stereo TRS 3.5mm jack input or 2× mono TS 3.5mm
    — solder jumpers to convert to DC coupled
    — solder jumpers to normalize left input to right channel
  • Soft Zenner clipping at 10vpp on mixdown stages
  • NE5532 op-amp for low-noise pre-amp
  • 1k output impedance
  • Chaining back jumpers L/R inputs and L/R outputs:
    — Only when Buddy outputs are not patched, the mixdown
    is sent to the output chain jumpers (patch configurable

Technical details:

  • power consumption: +12V: <27mA, -12V: <27mA
  • 5HP
  • depth 30mm (with the power cable attached)
  • PTC and fuse protected 10pin power connector

      Brand: Bastl Instruments


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