Keith McMillen Instruments K-Mix Audio Interface and Digital Mixer

Up for sale is a brand new, factory-sealed Keith McMillen Instruments K-Mix. The K-Mix is a ultra-durable, highly portable 3-in-1 hybrid audio tool: a programmable standalone digital mixer, a 24-bit/96kHz USB audio interface, and a tactile MIDI DAW control surface.

Designed with no moving parts and an indestructible opto-tactile layout, the K-Mix is built for seamless performance in the studio, on stage, or on the road.

Condition

• Brand New: Factory-sealed in original retail packaging.
• 100% Genuine Keith McMillen Product.

What is Included

• 1 x Keith McMillen Instruments K-Mix Audio Interface / Mixer
• 1 x K-Mix Power Supply & International Adapters
• 1 x USB 2.0 Cable (Micro-B to USB-A)
• 1 x USB Power Cable
• 1 x Quick Start Guide & Documentation

Key Features

• 3-in-1 Audio Multi-Tool: Functions as an 8-in/10-out USB Audio Interface, a Standalone Programmable Mixer, and a MIDI Control Surface.
• Ultra-Low Noise $\mu$Pre Preamps: Two high-efficiency, pristine mic/line preamps with +48V phantom power on XLR/TRS combo inputs.
• Onboard DSP Processing: Per-channel 3-band semi-parametric EQ, compressor/limiter, noise gate, and a master reverb effect.
• No Moving Parts: Constructed with a rugged, rubberized opto-tactile surface that uses LED-backlit touch faders and rotary zones for ultimate durability and precision.
• Standalone Capability: Save up to 12 recallable presets and perform mixing, routing, and effects without connecting to a computer.
• Surround Sound Mixing: Built-in multi-channel spatialization support for Quadraphonic, 5.1, 7.1, and Octophonic surround setups.

Technical Specifications

• Type: Digital Mixer / Audio Interface / MIDI Controller
• Converters: 24-bit / AKM Converters (up to 96 kHz)
• Analog Inputs: 2 x XLR/TRS Combo (Mic/Line/Hi-Z) + 6 x 1/4" TRS Line Inputs
• Analog Outputs: 8 x 1/4" TRS Balanced Line Outputs + 3.5mm Stereo Headphone Output
• Digital Connectivity: Micro-USB (Audio, MIDI, Power) & Mini-USB (Power/MIDI Expander)
• Controls: 8 Touch Channel Faders, 1 Master Fader, 4 Rotary Controls, 30 Tactile Buttons
• Dimensions: ~9.2" x 6.6" x 1.5" (23.5 x 16.8 x 3.8 cm)
• Weight: ~1.6 lbs (0.73 kg)

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Located in Dobbs Ferry, NY, The Muzic Store INC has been family-owned and operated since 1982, proudly serving Westchester County and beyond for over 43 years. We’re more than just a music shop — we’re a community of musicians, gear lovers, and industry experts who live and breathe music every day.

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