Speck X.Sum Line Mixer with Breakout Box

16 stereo input channels and two stereo outs
MFR# X.Sum-03
Speck X.Sum Line Mixer with Breakout Box
Speck X.Sum Line Mixer with Breakout Box Speck X.Sum Line Mixer with Breakout Box Speck X.Sum Line Mixer with Breakout Box


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The Speck Electronics X.Sum is a 32 x 4 line mixer that can be used for external DAW summing or as a line mixer for synths, samplers, and effect returns. Any of the 16 stereo channels can be assigned to either the main stereo Mix output or the stereo Mix-B output.

The X.Sum design takes you beyond the simple “hard-left” or “hard-right” summing box, and gives you 16 stereo input channels with level, pan, mix assign and mono select.

The In's & Out's
All audio inputs and outputs are fully balanced and available on TRS connectors.

Connect the X.Sum to virtually any line level source: balanced, unbalanced, transformer, or transformer-less. The X.Sum has high headroom that will handle balanced signals up to +28dBu.

16 Stereo Line Inputs

  • Stereo level control
  • Pan/balance control
  • Mix assign switch that routes input channel to the main stereo mix or Mix-B stereo mix
  • Mono Switch
  • Left and right balanced TRS inputs

Master Section

  • Master level control
  • Stereo/mono switch
  • Monitor/Phone level provides adjustment to headphone jack and Mix-B output
  • Balanced TRS stereo mix output
  • RJ-45 expander connector

Additional Information

Condition New
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