MATRIXSYNTH: Moog Polymoog 203a 1976 Polyphonic Vintage String Synthesizer w/ Model 285A Polypedal Controller


Tuesday, October 07, 2025

Moog Polymoog 203a 1976 Polyphonic Vintage String Synthesizer w/ Model 285A Polypedal Controller

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via this Reverb listing

Pics of the inside below.

"Make/Model: Moog Polymoog 203a
Serial #: 3009
Location of Manufacture: USA
Number of Keys: 70
Case: Does not include case, but will be professionally packed and shipped

Features: Includes Power Cable, Model 285A Polypedal Foot Controller, Schematics printouts from Norlin Music, Original owners manual, a binder full of blank preset pages, and original date of purchase from Keyboard Exchange in Denver dated 10-19-1979; Does NOT include Legs

Pedal is in great condition! The rubber panels on both footswitches show some lifting on both ends, but are overall still glued securely. There are some blemishes on the large knobs from use, but nothing that would hinder functionality. The bottom side shows light scrapes and some blemishes to the rubber feet from handling, but there isn't any sign of abuse on this controller, just signs of normal use.

Condition: This is a fantastic string synth that has a ton of beautiful sounds! The keys all feel great and not sticky; there is some clunky-ness to them indicative of the era where they were gluing weights into each key. There are some light signs of use here and there on the keybed, but no broken keys or any blemish I'd consider egregious. The control panel looks fantastic with no major blemishes, and all sliders are moving as expected. The sliders are not the smoothest you'll ever find, but for an instrument pushing 50 years old they still feel great! The only exception to this is the filter type selector which is not perfectly mounted to the board; it still moves and functions just fine, but there is some looseness to this slider that you don't feel on any other. The enclosure looks great overall; there are some signs of use like light scrapes and blemishes here and there, but these are mainly grouped to the corners and bottom edges, including the left side, below the keys on the front side, and some more along the bottom side. The faux wood trim show some bubbling, mainly the strip on the right side, but overall this trim still looks great! The back features a sticker from Denver Keyboard Exchange, but as this is a wonderful piece of Colorado history we felt it right to keep. This is a wonderful vintage keyboard, but because it is a preowned instrument there may be a blemish I failed to notice, so please inspect photos carefully before purchase! All outputs function as does the pitch ribbon strip! The "Pre" button stays pressed under the waveform rank mix, but it functions correctly as when you select the "var" button the led switches. The LEDs under the combination wavforms doesn't light up, but it does turn off the LEDs for the individual waveforms so it is still easy to know where you stand. All controls have been tested and are in working condition; these vintage synthesizers are always a bit temperamental, but I was not finding any function that did not work as expected in my testing. Everything which is included is pictured and is ready to be professionally packed and shipped."

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