Roland System-100M Module 131:
A mixer and tuning oscillator from a legendary patchable synth!

The Roland System-100M, released in 1975 during the “Golden Era” of Japanese audio equipment, is a renowned yet rare monophonic semi-modular analog synthesizer. The System-100M can be expanded extensively, using the various module options, and a built-up system has nearly unlimited possibilities for crafting analog synth sounds, for which the system is critically acclaimed. The System-100M is patchable and semi-modular, providing a tactile and satisfying experience. This Model 131 was released in 1980 and is a mixer and tuning oscillator unit for the System-100M. The oscillators frequencies are 220, 440, and 880 Hz. It has a headphone amp. The System-100M has been used by countless artists over the years, including The Human League, Vangelis, Hans Zimmer, and much more.

This synth is in excellent condition, though it does show some expected signs of age, including some scuffs (please see photos). It has been tested by our professional technician and is working perfectly.

Additional Information

Technical Specifications
-Serial : 100781
-Country of Manufacture : Japan
-Power Supply :-
*Regulated DC+15V 50 mA MAX
                  DC-15V 20 mA MAX
*Unregulated DC+22V 30 mA MAX


Please check the power requirements for this device and the specifications of your power supply. If you need to use this item in a 220-240 V environment, you'll need a transformer. We sell high quality Japanese compact transformers (Nissyo), which will allow you to use this item safely and with good performance in your country.

Import Tax
・Import duties, taxes, and other charges which are not included in the item price or shipping charges are the buyer’s responsibility.

・Please check with your country’s customs office to determine what these additional costs will be prior to bidding or buying.

・Except in the case of faulty or damaged items, refunds do not include any return shipping or shipping charges. Your return shipping charge will be deducted from your refund if you receive any.

This item is sold As-Described

This item is sold As-Described and cannot be returned unless it arrives in a condition different from how it was described or photographed. Items must be returned in original, as-shipped condition with all original packaging.Learn More.

Listeda year ago
ConditionVery Good (Used)
Very Good items may show a few slight marks or scratches but are fully functional and in overall great shape.learn more
  • Module-131
  • Gray
  • 1975
Made In
  • Japan


Yokohama, Japan
Joined Reverb:2019

Reverb Gives

Your purchases help youth music programs get the gear they need to make music.

Carbon-Offset Shipping

Your purchases also help protect forests, including trees traditionally used to make instruments.

Oops, looks like you forgot something. Please check the fields highlighted in red.