Speck Electronics XTRAMIX SSM

Had this mixer setup to amplify and sum my keyboards for a number of years and worked wonderfully. I recently updated my interface I/O and it is no longer needed. This unit is in great condition despite a few minor scratches (see photos), and unfortunately when I bought originally the plug for the power supply was missing the ground pin.

Speck Electronics XTRAMIX — Ultra-Compact SSM Line Mixer w/ PS-3 Power Supply

The XTRAMIX is one of Speck’s most respected ultra-compact mixers, designed specifically for professional line-level sources in studio, synth, and rack environments. Built around Speck’s SSM (Studio Sound Module) architecture, this unit delivers exceptionally clean headroom, low noise, and musical summing in a compact footprint that fits easily into dense studio or live rigs.

Ideal for synthesizers, drum machines, effects returns, and submixing duties, the XTRAMIX provides multiple high-quality line inputs with precise level control and transparent summing that preserves the integrity of your signal chain. It’s a favorite among keyboardists, electronic musicians, and engineers who need reliable, great-sounding line mixing without the bulk of a full console.

This unit includes the original PS-3 external power supply, ensuring proper operation and headroom as designed by Speck.

Features

• Ultra-compact professional line mixer
• Designed for synths, drum machines, and rack gear
• High headroom, low-noise SSM circuitry
• Transparent, musical summing
• Individual-level control per channel
• Rugged, studio-grade construction
• Includes Speck PS-3 power supply