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Roland System-500 Series SYS-531 6-Channel Mixer Eurorack Analog Synth Module

Written by

Sam Beattie

Vintage-style modular and Eurorack synths are coming back in a big way. Contemporary music trends have seen more and more musicians turn to the analog-inspired sounds of old, and manufacturers have responded in kind.

Roland are at the forefront of this trend, producing faithful reissues of some of their most popular releases in recent years and satisfying our renewed love for classic-sounding synth technology. 

For 2018, they've decided to keep up the momentum with additions to their System-500 series. These compact modules are inspired by the legendary System-700 and System 100M series, aiming to provide never-ending modular synth fun in a handy, budget-friendly format! 

The System-500 531

Roland System-500 Series SYS-531

Inspired by the SYSTEM-100m’s 131 output module, the SYS-531 brings an updated approach with convenient and modern features. With six high-quality inputs, each with level slider, pan knob, and performance-friendly mute button, the SYS-531 is your central hub for mixing mono or stereo (PRE only) signals. It has high-fidelity sound with low noise, ensuring that your modular rig sounds its best. The six pan knobs are CV controlled so you can create space and dimension, and achieve interesting stereo effects. There’s even a boutique-quality stereo preamp, so you can bring in mic or line level signals –and abusing this preamp’s gain knob gives you pleasing overdriven tones. The headphone section has an easy-to-reach, dedicated volume knob as does the multi-format output section that lets you use both 1/4"and 1/8” cables. There’s even an LED level indicator for visual feedback.



  • MUTE switch (1–6)
  • SIGNAL IN slider (1–6)
  • PAN knob (1–6)
  • VOLUME knob
  • MIC LINE switch
  • GAIN knob
  • PHONES knob


  • SIGNAL IN jack (1–6): Miniature phone type
  • CV IN jack (1–6): Miniature phone type
  • OUT 1 jack (L,R): Miniature phone type
  • OUT 2 jack (L,R): 1/4-inch phone type
  • PRE IN jack: Stereo 1/4-inch phone type
  • PHONES jack: Stereo 1/4-inch phone type
  • Power Supply: Eurorack power
  • Current draw: 195 mA (+12 V), 165 mA (-12 V)
  • Accessories: Owner's Manual, Eurorack installation screws (4 pcs), Eurorack power cable
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