Opus 3

“Works good except brass section stereo panner only does either left or both channels. Cannot move brass sound to right channel only. Wood sides are worn. The top overlay is worn and has a tear in it by the power switch.

Includes power cord and (like new) Gator GMIX-2030-6-TSA Case with two keys.”
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” The Opus-3 is one great little synth. It was designed by Herbert A. Deutsch from Hofstra University who originally nudged Dr. Robert Moog into building synthesizers and later served as director of sales & marketing for Moog Music. Herb also wrote the owner’s manual. The sounds are broken up into 3 categories: Strings, Brass and Organ. Strings and Brass have their own separate VCF (filter) sections, the Organ section has none. The Opus-3 also has 2 sound outputs for an early stereo effect with panning! It’s a colorful little synth with clearly laid out sliders and is fairly straight forward. It has classic analog Moog sound quality and is a great source of some string and lower octave techno-organ sounds.” Click here to search for synths on eBay

“1980 Moog Opus 3 Vintage Compact Analog String Synthesizer + Gator TSA Hard Case

Works good except brass section stereo panner only does either left or both channels. Cannot move brass sound to right channel only. Wood sides are worn. The top overlay is worn and has a tear in it by the power switch.

Includes power cord and (like new) Gator GMIX-2030-6-TSA Case with two keys.” Click here to search for synths on eBay

“Original Moog Opus from 1980. In good working condition, strings are a little quieter and the pitch shifter is a little scratchy. (I have videos I can send to show what I mean) Some wear on the sides and the chorus selector switch is missing its cap. (Pictured)” Click here to search for synths on eBay

“Working – but the String section is quiet compared to the Brass and Organ sections. It has been serviced professionally by Antech Systems in 2012” Click here to search for synths on eBay

“This synth is in pretty rough shape. It’s missing some parts, and has plenty of damage. The tech that was working on it for me, did have it making sound. He has since passed away, and with him my hopes of restoring this synth are gone.It would be a good parts synth, or and ambitious restoration.”
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”

Moog Opus 3 Model 339 A
Fully Polyphonic synthesizer
4 Octave Keyboard
Strings, Organ and Brass
Presets and variable settings
Mono and Stero Outputs
input for foot pedal
manual ”
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“MOOG OPUS 3 ANALOG SYNTHESIZER. Pristine studio condition. Plays nicely. Includes flight case.”
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“Moog Opus-3 Keyboard Synthesizer in perfect working condition. Keyboard was just serviced by WD machines in Miami and sounds amazing!”
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“This is for a Moog Opus 3 synthesizer keyboard. The unit turns on and works with the following issues:

The on/off button is sticky
The organ function works fine
The chorus function works intermittently
The organ/bass function has sound, but only static
Sections on the keyboard have some white dots from previous owner for marking positions

I purchased this and everything worked, but days later had issues. I’m not a keyboard guy so not going to take the effort to fix so selling at a reduced rate.”
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“Moog opus 3. Condition is Used.

Also comes with the Original Power Chord and Foot Pedal! I bought this item about 30 years ago and it worked fine… used it a couple of times 10 years ago in the studio. I live near Atlanta if interested or it can be shipped.” Click here to search for synths on eBay

“Up for sale is this amazing vintage, rare 1980s Moog Opus 3 analog strings/brass/organ synthesizer. Synth is in overall good condition. All keys play and everything seems to work, the only things I’ve noticed is the “right” output in stereo mode cuts in/out, but could be an easy fix – mono mode works great. A few of the sliders are a bit finicky, but may just need some cleaning. Comes with the power cord.” Click here to search for synths on eBay

“Up for auction is my fully functioning Moog Opus 3 Analog Keyboard Synthesizer with power cable and custom case.” Click here to search for synths on eBay

” I bought this from an old landlord, used it for a few records and loved it! One of the switches on the mixer section is missing but doesn’t affect playability. Some of the faders are a bit scratchy but everything is functional, just could be taken apart and cleaned to be in mint condition. The wood panel on the left side also needs to be reglued. Very playable condition, but could be refurbished to be like new. ”
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“Moog Opus 3 Strings Organ Brass Synthesizer. Removed the black foam that was originally installed between the PCB and the faceplate. This foam deteriorated over time and if not removed it could stick to the board. Mine was removed and all sliders/ switches were cleaned.” Click here to search for synths on eBay

“Overall good condition, all keys work. Played with it for about an hour or so now and seems to be working good. I even took video if anybody is interested in watching me push a couple of keys while hooked up to an amp.”
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“Powers on and works, but not 100%.

All keys work and most controls seem to be doing what they’re supposed to.

Mode 1-2 switch is missing.

At the very least, it will need a thorough cleaning / spraying of pots and faders.

May need more attention.” Click here to search for synths on eBay

“This has been tested and we get audio through our new model headphones on the right side but nothing through the left side and no audio comes through at all without headphones. Some keys are a little tight but still works. Audio could be due to operator error. Sold as is though.” Click here to search for synths on eBay

“The unit has been tested to ensure It Powers up, Produces Sound, All knobs and faders respond. no big scratches this unit is very clean. The unit is missing two knob covers for the sliders. This Unit has been tested to the best of my ability but as with any vintage electronic equipment it may need some fine tuning and repair.” Click here to search for synths on eBay

” There are a couple of missing pieces on the unit. ” Click here to search for synths on eBay

“I DO NOT KNOW THE HISTORY OF THIS KEYBOARD.
ORIGINAL OWNER PASSED AWAY. MY TECH (A FORMER 70’S ERA MOOG TECH), INDICATES THAT
IT IS COMPLETE.
UNIT DOES NOT POWER UP.” Click here to search for synths on eBay

“Rare Original owner MOOG and in working condition. This was a family item from the 70’s, stored at our parents home all these years. MOOG is in working condition, it was used at home only, not professionally.” Click here to search for synths on eBay

“Moog Opus 3 in great working order. Condition is very good.
Varnish on wood around edges coming off here n there.” Click here to search for synths on eBay

“Working Moog Opus 3. I use this keyboard regularly and it works but after a few years I’ve set my eyes on some other vibes. The master gain knob is missing along with a bit of bubbling from the plastic overlaying the control surface and some sticky faders. The wood end cap on the right side needs some repair as well. Over all I’m being honest the keyboard works but its not in perfect condition.” Click here to search for synths on eBay

“Here’s a Moog Opus 3 String Synth. I think they are under-rated when compared to the Arp Omni, Solina and Roland’s.. The Moog features a much more extreme bandpass or hi-pass filter which gives a ton of string options, and the chorus section is outstanding. The brass is quite good too, with pretty detailed controls for tailoring the sound in addition to it’s preset. The opus’ sound shaping controls go much farther than any other string synth I’ve come across, which are typically just attack and sustain like the solina..” Click here to search for synths on eBay

” Here’s a Moog Opus 3 String Synth. I think they are under-rated when compared to the Arp Omni, Solina and Rolands.. The Moog features a much more extreme bandpass or hi-pass filter which gives a ton of string options, and the chorus section is outstanding. The brass is quite good too, with pretty detailed controls for tailoring the sound in addition to it’s preset. The opus’ sound shaping controls go much farther than any other string synth I’ve come across, which are typically just attack and sustain like the solina..

I’ve included a video of me testing out the controls.. I play through each key with a tone, and then use the string section, its bandpass filter and chorus, followed by adding in organ sounds, and finally experimenting with the brass preset and customizing it with filter and envelope changes…

I couldn’t find any issues and everything functioned as normal after it warmed up, for the first minute or so after you turn the unit on, the Brass section filter was sluggish to function, but it corrects itself after 5 minutes. occasionally a slider would give a little bit of noise which I’m assuming is dirt or wear on the pot. Cosmetically it’s in pretty good shape. See the pics for full documentation of end caps and control panel.”
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“Been in my sole possession since new (1982). Never gigged and largely unused in the spare room for the past 20 years.
Everything works and all the keys play. There are a few crackles and pops, but gets slightly better when warmed up.
It has never been serviced, so generally needs a good internal clean. Therefore the black foam has not been removed. All the knobs and sliders are intact albeit slightly yellowed. Power lead is included, UK 220 volt. The manual is also included.”
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“Seller Refurbished, professionally restored to full working order, has signs of wear on the wood panels, not bad, see pictures” Click here to search for synths on eBay