Opus 3

“Moog Opus 3 keyboard circa 1980.

I have had this keyboard for about 30 years for most of that time in an attic.

There are a few sliders missing but these are available.

The D# makes a slightly weird and same note for each octave. I have read this is common problem that can be sorted.

The right hand side panel is loose and needs to be properly fixed together with a small block beside the rightmost key.

It does work and you can get some great sounds out of it.” Click here to visit listing on eBay

“Introducing the Vintage Moog Opus 3 Synthesizer, perfect for any musician looking for a unique sound. This keyboard synthesizer, designed by MOOG, is a timeless classic that has withstood the test of time. Its intricate design and advanced features make it a must-have for any professional musician or music enthusiast.

This item is being sold as “For parts or not working” and is being offered without any reference to its condition. The Moog Opus 3 Synthesizer is part of the Musical Instruments & Gear category, specifically Pro Audio Equipment and Synthesizers. Its aspects include Brand: MOOG, Type: Keyboard Synthesizer, and Model: Moog Opus 3. This unit will not power on” Click here to visit listing on eBay

“Moog Opus 3 Vintage Synthesizer from the 70s/80s.

Rare and unique polyphonic vintage moog analog synth. Analog strings, organ, and brass sounds, with a moog filter.

In partial working condition, with a few issues.

All the synth engines play sound as expected, and sound great.

All sliders, knobs and switches work as expected, but several of the sliders are scratchy, and will need to be cleaned.

A few of the sliders will sometimes cause the tuning to randomly jump, but it quickly returns back to normal.

The right wooden end of the keybed is loose and will need to be glued back on

Also Missing a few of the slider caps, but it doesn’t affect performance at all. ”
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“1975 Micro Moog 2090 serial #1334, turns on and works with sound, will need full cleaning/service but as it is, sound and effects work, keys contact points will need cleaning but for the most part they all function, cosmetically in fair condition for its age. Update the power led indicator has a loose wire so it tends to not work at times but does not effect the keyboard function just a loose wire somewhere.”
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“Moog Opus 3 Vintage Synthesizer from the 70s/80s.

Rare and unique polyphonic vintage moog analog synth. Analog strings, organ, and brass sounds, with a moog filter.

In partial working condition, with a few issues.

All the synth engines play sound as expected, and sound great.

All sliders, knobs and switches work as expected, but several of the sliders are scratchy, and will need to be cleaned.

A few of the sliders will sometimes cause the tuning to randomly jump, but it quickly returns back to normal.

The right wooden end of the keybed is loose and will need to be glued back on ”
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“Serviced Moog Opus 3

Chassis is extremely solid, all knobs are there

Faders cleaned and lubricated, no cutting out

100% functional

Pickup in Chicagoland area” Click here to visit listing on eBay

” Moog Opus 3 Synthesizer Model 339A, in original case, working, small Boo-Boo’s. in good working condion, the main thing is that the last two keys on the right. B and C, the tabs are broken off and they don’t sit level on the keyboard. the keys still work if you push up near the top. Need to correct these tabs, shown missing in the last photo. Other than that it is in good working condition, see video. It is in the original case, the cushions have been replaced. The Forge case is in very good condition, and the Moog will be shipped in this case. There are remnants of the old black cushions, which has turned to powder, and sometimes you still get a little black dust from the original cushions. I have more videos, if you contact me I will try to send you these extra videos. The wood finish on the side has some scraps and stains, see photos” Click here to visit listing on eBay

“Moog Opus 3 Paraphonic Synth

Pro-Serviced (re-capped power supply, cleaned) by Mystery Circuits Inc. in September 2023

(VIDEOS available upon request, eBay doesn’t allow HTML links so MESSAGE me if interested)

See photos for cosmetic condition, has been refurbished. This one has been thoroughly cleaned so no mystery goo problem, which is common with these. Beware of buying a Moog Opus that might have this problem!

There may be an issue with one slider (Envelope Decay) which is documented in the video. Otherwise it is 100% parts complete and 100% functional. The videos demonstrate this.

Ships in a heavy case, which is partially damaged so no guarantees on the condition of the case after shipment.” Click here to visit listing on eBay

“For sale: Used Moog Opus 3 keyboard. Good cosmetic condition and all functions tested and working.

No manuals, but these are available on the web.” Click here to visit listing on eBay

“I’m finally parting with my Moog Opus 3 after many years of being kept in a smoke-free studio and apartment. This instrument is a legend owned and used by the likes of Stereolab, Boards of Canada, Kraftwerk & Ministry!!!

Apearance-wise it has a handful of scuffs, marks, and scratches as anyone born in 1980 would.

It was recently serviced in July by an authorized Moog service tech in NYC.

I can include a manual

Here is a rundown of the work;

PCBs removed.

The Articulator Attack slider was broken and has been replaced. All controls were repaired/replaced as necessary and cleaned.

Bad solder joints reflowed on all boards. Connectors resoldered on the panel and voice PCBs.

Replaced a handful of op-amps on the panel board overall.

A few purple electrolytic capacitors that are liable to leakage were replaced on the panel PCB.

Key contacts and bus bar were cleaned and treated for proper note triggering.

The voices seem to have a fairly even decay, so I’ll leave the envelope capacitors (1 per key) as is for now to keep repair costs down. I think it should be fine for the foreseeable future.

Full calibration and full function check after repairs are complete.” Click here to visit listing on eBay

” Moog Opus 3 Synthesizer with Owners Manual and Technical Service Information.

Nice vintage analog synthesizer. All the controls needed to make truly unique sounds.” Click here to visit listing on eBay

“Moog Prodigy 336A (Serial #7113) with Hard Case

Moog Prodigy model 336A monophonic synthesizer in good working condition. Produced by Moog from 1979 to 1984 and only 11,000 were made.

The synthesize features a dual voltage-controlled oscillator design to deliver classic analog sounds with easy-to-use controls. Oscillator 1 has sawtooth, triangle and pulse waveforms. Oscillator 2 has sawtooth, triangle and square waveforms. The waveforms can be detuned and the oscillators can be synchronized. In sync mode, the pitch wheel alters the tonality of the pitch as opposed to the pitch itself. There are Oscillator Mod, Mixer, Filter, Filter Contour and Loudness Contour control sections, as well as Tune and Slide Wheels. The Prodigy features a genuine Moog four-pole 24dB/octave lowpass filter (the Emphasis knob), A/D/S envelope generator, and LFO with square or triangle waveforms and routing to the VCF, VCO, or both. The synthesizer features both Pitch and Mod wheels.

Includes hard case with removable foam pads. 3-prong U.S. electrical cable also included. And a photocopy of the Moog Prodigy manual. I’ve owned this unit from 2012, purchased on eBay.” Click here to visit listing on eBay

” Please read the whole description. Moog opus 3 synthesizer with custom made padded wooden case. It’s about 43 years old. 4-note polyphony. Powers on fine. Red blinking light to show modulation rate is good. Pitch bend and volume sliders and cutoff etc. slider all good. I checked each slider and each switch but I won’t list them all.

Filter sweeps all nice and pretty juicy. Sounds like the synth brass on “Broad Sword” by Jethro Tull. Strings have sweet Chorus like the Bee Gees. I Tried all three outputs, all good. I hooked the Moog up to the external input on a Hammond to test the volume, the Moog signal is nice and loud.

There are 2 “F” keys that won’t play. They are the 2 highest F naturals. You can dodge around this by using either a pitch bend or using the 16′, 8′, and 4′ stops to dodge the octave.

When set to the “organ” setting there is one incontinent oscillator that note that won’t stop speaking. You can make the note stop by switching to string or brass.

There is no oscillator sync on this model. ” Click here to visit listing on eBay

“Moog Opus 3 Synth C1980. Completely fabulous synthish strings brass and organ machine. Completely unique and in excellent condition” Click here to visit listing on eBay

” HERE I HAVE LISTED

ONE OF MY PRIZE AND FAVOURITE SYNTHS,

Loved this to bits

I used this in the early 80,s. On your. In the USA.

Absolutely fabulous.

And great when recorded with it to

Been checking

Not many of these around. These days

Obviously no body wants to part with them

Since I’m my ownership, decades ago,

I had the moog serviced at Highgate electronics. London. Back all them years.

It’s been sat. Boxed up. In my loft”
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“Have you been searching for a very rare classic/vintage synthesizer? Well; here it is! One of the MOST BEAUTIFUL synthesizers ever built… Any angel you look at it, it is BREATH-TAKING; and screams late 70’s…
What makes this gem extra unique and special, is the condition that is in! It has been well preserved, and is in MINT CONDITION! This wonder is adored by all collectors, and will keep on going up in value…
Needless to say, being in this condition, everything works perfectly as it was, when it rolled off the factory.

My wife inherited this from her grandfather. He was a very neat person, and a collector. So, it has been pampered all its life, barely played with, and mostly tucked away securely in the closet with the rest of the collectables (that we might make available for sale soon! Stay tuned…). I truly enjoy, and adore this magnificent synth, and really wish I could keep it, but the decision is not mine to make…
I am sure that if you are looking at this item, you know enough about it. But you can always Google it, and read all you need.
It is truly hard for us to part with it, and we hope this unique and rare beauty finds a good home, and stays in this condition, so one day, it may end up in a museum…”
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“Collection only/ no postage.
Moog Opus 3 from my personal collection of synths. It is in really nice condition, works perfectly and sounds great – a real collectors item and a very lovely synth to own and play.

A common fault on some of the old Moogs like Opus 3 and Moog Rogue is they get the dreaded black gunk from the old black dust sheet that decays over time and ends up on the sliders and it all has to be removed. This has already been done on this unit, so you won’t have any problems with the dreaded gunk as it has already been sorted out. All leys work fine with no clanky keys. The chorus is also working perfectly and sounds magical.” Click here to visit listing on eBay

“Moog Opus 3 in good physical condition and perfect working order. Great sounding synthesiser with warm analogue sound for strings / organ and brass. Very nice chorus effects and filter. Minor chip to one of the wooden cheeks.The Moog Opus 3 is analogue poly string synthesizer released in 1980. The Opus-3 had 3 distinct sections for strings, brass, and organ alongside of two analog VCF sections, some simple modulation capabilities, an on-board chorus effect and a unique stereo panning effect.” Click here to visit listing on eBay

“Vintage Moog Opus 3 synthesizer. Shows signs of age but is in really good shape for its age. It needs 2 switches replaced, one A key is not working, some pots are scratchy. I’ll be honest I know nothing about these so I have posted a video showing it’s functionality.” Click here to visit listing on eBay

“This Moog Opus 3 is in great shape and has been studio-kept most of its long life. Everything works. There are a few minor cosmetic scratches and signs of use typical for a forty to fifty-year-old instrument. (see pictures) Functionality remains unaffected. Two small knobs are missing but not missed.; One missing knob that sits atop the chorus DEPTH slider. The depth is still adjustable with a paper clip or a toothpick. I never bothered replacing the knob because I have always left the depth on full and only adjust the rate. The chorus sounds amazing, especially on the strings. The missing knob on the Organ/brass VCF Off On switch I replaced with a small screw and it’s easily switchable though I prefer to keep this always on.

This Opus is built like a tank. It’s ALL ANALOG COMPONENTS reside safely inside an ALL METAL CASING with REAL WOOD END PANELS. There’s a small area on the settings control panel that is worn away; below the Master Tune knob and to the left of the PITCH WHEEL. It’s strictly cosmetic and does not affect function or sound. Only the screen-printed top panel is worn, NOT the main metal housing. I smoothed it over with a small piece of black tape. It’s easily removed if you prefer. There is one key (low E) that shows a visible repair of the plastic. The note plays perfectly, is unaffected, and can be easily replaced if desired.

There’s a little noise if I wiggle the output cables because I’m currently out of contact cleaner. One small blast of DEOXIT and she will be quiet as a church mouse again. If my supplies order arrives before this ships I’ll be happy to do the cleaning for you. The unit will be very well packed and fully insured.” Click here to visit listing on eBay

” Seltener Moog Opus 3 / original europäische Version / Model 339BX
Sehr guter Zustand, kleine Gebrauchsspuren
100% technisch einwandfrei ohne Einschränkungen
Frisch von einer Musikelektronik Fachwerkstatt geserviced
Alle Tasten, Schalter, Drehpotis und Slider funktionieren einwandfrei
Bereit für den Betrieb in einem neuen Studio oder zu Hause” Click here to visit listing on eBay

“PHYSICAL CONDITION: Good – Overall in solid condition but there is dust/dirt build up in hard to reach places. Some of the slider caps are missing. The wood panels are worn after all these years. One toggle switch is missing for the “Brass”-section. This unit definitely has some flaws but it is still a very cool instrument! Overall, the physical condition is good! WORKING CONDITION: Good – The 8′ in the strings section is scratchy and intermittent and the strings section has a slight hum when engaged. The Brass and Organ sections are working nicely, some of the sliders are a little scratchy but will clean up with a little exercise. All keys and controls are otherwise in fine working order. Overall working condition is good” Click here to visit listing on eBay

“Vintage Analogue Moog Prodigy in superb condition.” Click here to visit listing on eBay

” Vintage Moog Opus 3 Analog Synthesizer w/ Flight Case

Tested and working great, all keys sound and scale excellent, all sliders and knobs adjust sound with little or no static. Has one broken on/off toggle in the mixer section but you can just use the knob to turn it off if need be.
One of Moog’s most useful synth’s in my opinion, super great for a studio or live.
Ships in a vintage Calzone flight case, the foam is getting old in the case but it will keep it safe on it’s journey. Will be wrapped and packed tight in the case.
These are getting very hard to find these days. Thanks. “ Click here to visit listing on eBay

“Moog Opus 3. Very good condition and fully functioning. Bought this for a project but unfortunately don’t have the space to keep it.” Click here to visit listing on eBay

“Moog Opus 3. Very good condition and fully functioning. Bought this for a project but unfortunately don’t have the space to keep it.” Click here to visit listing on eBay