Modular Synthesizers

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HPO Headphone Output
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The ALM Busy Circuits ALM019 HPO provides stereo headphone output for Eurorack systems with an unprecedented and much welcome 2hp, skiff-friendly footprint.

Excellent for filling small gaps in skiffs and large systems alike, the HPO is a discreet, clean, and convenient way to keep synthesizer sound quiet and personal.

  • 2hp headphone output module for Eurorack synthesizers
  • Dedicated volume control
  • 1/8" stereo headphone output
  • Left and Right channel inputs
  • Right channel by default normalized to Left input for mono to stereo upmixing

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