Keith McMillen Instruments K-Mix



The Keith McMillen Instruments K-Mix is an 8 in / 10 out audio interface and programmable mixer with 2 ultra-accurate, ihigh-efficiency low-noise µPre preamps, and a precision opto-tactile control surface that was designed from the ground up for an unprecedented level of control.

The µPre preamps provide superb high-efficiency, ultra-accurate gain. K-Mix is a go-anywhere, fully-programmable, audio multi-tool with integrated 8-channel surround sound. Because it has no moving parts, K-Mix can be transported without the fear of breaking off a fader or knob. For home recording enthusiasts and artist on the go, K-Mix fits in your backpack and allows you to fine tune your sound in the studio or on stage.

Keith McMillen Instruments K-Mix Features:

  • Audio Interface – K-Mix is a pro-quality USB audio interface with µPre preamps for superb quality audio recording in the studio or on the stage
  • Programmable Mixer – K-Mix is a fully programmable mixer that features flexible routing, per-channel DSP, and can function without a computer
  • Control Surface – K-Mix features an unbreakable precision opto-tactile control surface designed from the ground up to command any DAW  (Currently Mac compatible ONLY )

Keith McMillen Instruments K-Mix Specifications:

  • Part #: K-737
  • Audio:
    • Input Channels:
      • 8 Balanced Inputs
      • Signals up to +28dBu
    • Output Channels: 10 Outputs (8 balanced)
    • Bit Depth: 24-bit AKM Converters
    • Sample Rate: 44.1kHz, 48kHz, 88.2kHz, 96kHz
  • Connections:
    • Analog Inputs:
      • 2x XLR/TRS combo jacks:
        • XLR Mic/Line Inputs (balanced)
        • Hi-Z Inst/Line 1/4” TRS Inputs (balanced)
      • 6x 1/4″ TRS Connectors (line level, balanced)
    • Analog Outputs: 8x 1/4″ TRS Connectors (balanced)
    • Digital:
      • 1x Micro-USB (Audio I/O, MIDI I/O, Power)
      • 1x Mini-USB (MIDI I/O via KMI Expander, Power)
  • Control:
    • Faders:
      • 8x channel faders (75mm)
      • 12x LED indicators per channel fader
      • 1x master fader with 24 LEDs
      • MIDI position CC output on all faders
    • Rotaries:
      • 4x rotary controls (360°)
      • 16x LEDs per rotary
      • MIDI position CC output on all rotaries
    • Buttons:
      • 9x Channel Select Buttons
      • 4x Bank Select Buttons
      • 17x Function Buttons
      • MIDI note output on all buttons
  • Microphone Preamps:
    • Number: 2 ultra low-noise µPre™ mic pres
    • Phantom Power: +48V phantom power
    • Gain: +60db additional gain
    • THD + Noise:
      • -107.6 dBu @ 0dB gain, 20Hz–20kHz (unweighted)
        -120.5 dBu @ 0dB gain, 20Hz–20kHz (A weighted)
    • EIN: -121.5 dBu, 150ohms @ 20Hz–20kHz, max gain (unweighted)
    • Frequency Response:
      • ± 0.13dB @ 20Hz–20kHz (44.1kHz)
      • ± 0.56dB @ 20Hz–40kHz (96kHz)
  • Processing:
    • Equalization:
      • 3-band semi-parametric EQ
      • ±18dB cut/boost
    • Compressor:
      • Compressor/Limiter on each channel
      • Adjustable threshold, attack, release, and makeup gain
    • Gate:
      • Noise gate on each channel
      • Adjustable threshold, attack, release, and gain reduction
    • Reverb: Master reverb with individual sends per channel
    • Surround:
      • Quadraphonic, 5.1, 7.1, and Octophonic surround output
      • Each channel assignable to one of four surround panners


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