4ms-listen-four-quarters

4ms Listen Four Quarters

Four-channel stereo mixer with balanced outputs and daisy-chaining

12 HP Eurorack module

The Listen Four Quarters is a four-channel stereo mixer for Eurorack systems, featuring two mono channels with panning and two stereo channels, designed to blend modular-level signals down to line-level outputs. It offers balanced 1/4-inch TRS outputs, a headphone output, and daisy-chain headers for expanding to 8, 12, or more channels with sub-mix capability, making it an essential utility module for live performance and studio integration.

Features

  • Four input channels: two mono with Pan knobs (channels 1 and 2), two stereo with dual L/R inputs (channels 3 and 4)
  • Fifth stereo channel accessible via INS header on the back
  • Main 1/4-inch TRS balanced outputs with zero-impedance line driver
  • Stereo TRS / Balanced switch for output configuration
  • Separate Main Level knob for main outputs
  • 1/8-inch stereo headphones output with independent Headphones Level knob
  • Signal lights on each channel and main outputs indicating level and stereo content (blue = left, green = right)
  • Pan knobs on channels 1 and 2 with center detent and psychoacoustically designed panning curve
  • Mono input on channels 3 and 4 left jack normalizes to both outputs when right jack is unpatched
  • Anti-pop circuitry that mutes main outputs during power-on to protect speakers
  • INS header on back for receiving daisy-chained mix from another Listen module (47k input impedance)
  • OUTS header on back for sending main mix to another Listen module or WAV Recorder (1k output impedance)

Controls & Jacks (20)

  • Channel 1 Level— Sets the volume level for Channel 1 (mono input with pan). Fully left mutes the channel.
  • Channel 2 Pan— Pans the mono signal from Channel 2 between left and right outputs. Center detent provides tactile centering.
  • Channel 3 Level— Sets the volume level for Channel 3 (stereo input). Fully left mutes the channel.
  • Channel 2 Input— Mono audio input for Channel 2
  • Channel 1 Pan— Pans the mono signal from Channel 1 between left and right outputs. Center detent provides tactile centering.
  • Channel 3 Left Input— Left channel input for stereo Channel 3
  • Channel 4 Left Input— Left channel input for stereo Channel 4
  • Channel 3 Right Input— Right channel input for stereo Channel 3
  • Channel 1 Input— Mono audio input for Channel 1
  • Channel 4 Level— Sets the volume level for Channel 4 (stereo input). Fully left mutes the channel.
  • Main Output Left— Left channel balanced TRS output. Can output balanced stereo pair (L/R) or left channel only depending on switch position.
  • Channel 4 Right Input— Right channel input for stereo Channel 4
  • Headphones Level— Sets the headphones output volume independently from the Main Level knob.
  • Main Output Right— Right channel balanced TRS output (always balanced stereo signal)
  • INS Header— Auxiliary stereo input via 3-pin header (left bottom, right top, ground center) for daisy-chaining or connecting additional stereo sources.
  • Channel 2 Level— Sets the volume level for Channel 2 (mono input with pan). Fully left mutes the channel.
  • Main Level— Controls the volume of the main balanced 1/4" TRS outputs and the OUTS header. Fully left mutes outputs.
  • Stereo TRS/Balanced— Selects output format: Balanced (down) for separate L/R outputs, or Stereo TRS (up) for L/R on single TRS cable in left jack. Always flip to
  • Headphones Output— Stereo 1/8" (3.5mm) headphones output or auxiliary stereo output. Can drive 8-32 ohm headphones.
  • OUTS Header— Main mix output via 3-pin header (left bottom, right top, ground center) for daisy-chaining to other Listen modules or WAV Recorder. Impedan

How-To Guides

  • Basic Four-Channel Stereo Mix
  • Independent Headphone Monitoring
  • Single-Cable Stereo Send to Interface
  • Eight-Channel Mixer via Daisy-Chain
  • Cable-Free Recording via WAV Recorder
  • Dynamic Stereo Panning of Mono Voices
  • Stereo Effects Return on Channels 3 and 4
  • Drum Sub-Mix with Group Level Control
  • External Stereo Source via INS Header
  • Twelve-Channel Mixer with Three Sub-Mixes

Explore the interactive Listen Four Quarters panel on BleepDex — tap any control to learn what it does.

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