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Sequential Circuits Pro One

“I am reluctantly selling my Pro One. Between a friend and I we have had this classic for over 30 years.
Serial No 100- 4403
It has been in storage for several years and after plugging in to test, it has developed a couple of faults,

I want to be honest so I will list what the obvious defects as well as the good points to give everyone a good basis for decision

Cosmetically it is still In great condition for a big old monosynth from 1981
It will power up . the on/off switch on the back is stuck in “on”
The synth will work in drone mode , the keyboard does not appear to work.
The knobs and pots all seem to work ok, a few are a bit noisy , in drone mode you can hear the filters change, LFO etc
Both the pitch bend and modulation wheels work ok.
The keyboard has a few slightly wonky keys, but the last time it worked, all the keys worked fine.
There are scratch marks to the bottom of the casing from being on stands etc over time
The front panel is in very good condition with very few visible blemishes
The wooden end cases are also in good condition.
I have replaced the fuse holder and replaced the fuse, and I have downloaded a manual with the original 20 preset patches

I have taken the Pro One to a private keyboard repair centre, the guy seems to think it’s a voltage problem, but 35 year old mono synths were not his strongest point, but he said it would definitely be salvageable with the right knoweldge. ” Click here to search for synths on eBay

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ARP Quartet

“In good working order. A few scratches here and there due to age. Easy and intuitive to programme – fun to play.” Click here to search for synths on eBay

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ARP Odyssey

“RAREST of the RARE: ARP Odyssey Mk I (Late Model 2800-1974-5). This is a two-oscillator analog synthesizer, and one of the first with duophonic capabilities (the ability to play two notes at the same time). This allows you to get that wonderful “guitar-like” distortion when used with Distortion/Flange effects.that bands like Ultravox used to good measure as a lead synth.
I used this in my home studio back in the day before it went into temp-controlled storage. NEVER USED ON THE ROAD/GIGGING. Smoke-Free environment always. Hence the museum quality condition. Please look at the pictures-Even the slider caps are all original!

I just had a full, cost-no-object service completed by one of the top analog synth techs in the USA (see some of the sample parts replaced in last pic): Trim Pot, Filter Caps, Sliders, etc. – Including a full set of Key Guides – so plays AS-NEW! NOTE: This is not a Mark II, even though it is Black, not White. Late models were done like this, hence there is no CV/Gate on back panel. Like I said, Super Rare. ” Click here to search for synths on eBay

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ARP Odyssey

“Original legendary duophonic ARP Odyssey MKIII in great working condition. The last of the original series including the four pole resonant 24dB lowpass “moog” filter!” Click here to search for synths on eBay

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ARP Axxe Project Machine

“Up for sale is this ARP Axxe.

I bought this secondhand so I’m unsure of what happening on the inside. Modifications have been done as far as I can tell by the back panel.

It powers up and sound comes out. Most functions work as they should but some sliders are a bit scratchy and the effect can jump about.

Things I know aren’t working are:

-The keyboard isn’t gating properly. When key is released a note is still in playing.

-CV jack on the back not working.

-Sample and hold switch not working

-Portamento” Click here to search for synths on eBay

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Oberheim TVS-1

“I have Owned this for 15 years.. its loveley condition

I will miss it I know but I am no longer using it so it need a good home..”
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Kawai K1m

” hi, the unit is working 100% fine. I recorded many songs with it’s help, the sounds are amazing, see youtube videos with demos. It has some lofi and oldschool sounds similar to Boards of Canada or other left field bands. You will have fun with it : ) happy bidding!”
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Oberheim Matrix 1000

“Used, just serviced & fully functional Oberheim Matrix 1000 6 voice analog synth. Unit does have rack rash and some marks on top/bottom.

Service list: replaced battery (and installed CR2032 holder), replaced power supply capacitors, replaced volume pot, upgraded OS to Tauntek’s 1.20 version.

Comes with:

– Oberheim Matrix 1000

– Power cable

– Nearly brand new Stereoping Synth Controller “1016r” edition with manual and power cord – just used for testing and a quick jam” Click here to search for synths on eBay

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Emu SP-12 Turbo 2.6

“Emu SP12 Turbo 2.6, Brought back to like new condition by Bruce Forat in LA in January 2016, used sparingly in my smoke free home studio triggered by another machine. 8 new audio outputs added, sample pot replaced and pcb traces repaired, all new numeric pad buttons replaced, pads replaced/reconditioned as needed, new battery, Noritake fluorescent display added, vinyl repro faceplate with small printing error (no start lettering under start button).

Case shows wear but machine works flawlessly, a pleasure to use and gives you that 12 bit crunch and ring on pitched down samples that only this machine and the SP1200 can do.” Click here to search for synths on eBay

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Casio SK-5

“Limited testing was conducted on this item. Appears to be functional. All keys played. The keyboard exterior has some wear, and scratches.” Click here to search for synths on eBay

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Teenage Engineering OP-1

“This OP-1 is in excellent condition, and in the original box with all accessories.

No signs of use whatsoever; It was received as a gift but was a duplicate of one that I already own.

There is a small crack on the Styrofoam box (See pictures)” Click here to search for synths on eBay

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Casio SK-1 Ciruit Bent

“Very versatile well built and bent vintage Casio
. Great for experimental or electronic music. You can get a lot of different patterns & glitches from the patch bay ..If you have never used one ..no fear! the simple explanation is use a banana cable and patch. Go for it no wrong way . I’ll throw in a couple cables to get you going.

To use this synth you will need banana cables ,and a Boss style 9v power supply.The builder pulled the speaker and added a 20 point banana plug patchbay. 1/4″ output jack And 9v input .

As you patch the points together it glitches out Sending the SK-1 OFF COURSE .Without patching it will work as a stock SK-1. Not so pretty but it really is a unique monster ! The reset button does not work so well so I just shut it off if reset is needed. ” Click here to search for synths on eBay

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Oberheim DX

“The real deal. Ships with original bought softcase that came with it, and I’m pretty positive the warranty still gets transferred. *(1983 Oberheim DX)” Click here to search for synths on eBay

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Marion Systems MSR-2

“That’s a video of the Marion ProSynth that I found on YouTube. The ProSynth is the non-expandable single voice board version of the MSR-2. It sounds about the same but the MSR-2 has some more options, such as filter inputs.

Comes with a printed manual, but the manual can also be found online.” Click here to search for synths on eBay

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Oberheim Matrix 1000

“For auction:

Oberheim Matrix-1000 sound module.

This is a hybrid subtractive-synthesis synthesizer: the oscillators are digital, the filter, amplifier, LFOs and envelopes are analog.

It is running firmware 1.11, you can update it to 1.16 (a third-party has developed it) by purchasing it online, a quick Google search will take you to the vendor.

Includes:

Oberheim Matrix-1000
Power cable
original manual
original packing
original box

Cosmetically the synth is 9/10. No scratches or dropouts on the audio output. ” Click here to search for synths on eBay

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Grendel Drone Commander

“Bought this awesome and unique synth for a recording project, but now I need to part with a few incredible pieces I can’t afford to keep.

The sound this puts out is dreamy and heavy. The filter is a beast.

These are getting to be VERY rare and hard to find. It’s the only one on eBay and it’s been a while since I’ve seen another listed. Buy it now!

What you see is what you get, and since I’m not an expert on this thing it’s being sold as-is, but it definitely sounds fantastic on the album we just made.” Click here to search for synths on eBay

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Grp Synthesizer A4

“Italian made GRP A-4 Analog Synthesizer.
3 full-feature oscillators, plus 2 discrete LFO’s. S&H, Noise, Mixers, 2 ADSR, 16-Step sequencer, A-440 generator. 12dB State variable filter and 24dB Low pass filters, Glide, Auto-pan, accepts external signals, Stereo Headphone TRS jack. CV/gates in and out. MIDI and USB in rear. Complex routing features: provides virtually the same flexibility of a modular without the need for patching. The A-4 is single-voice, and does not store patches.
Audiophile timbral quality. Truly holds its own with ANY other synth. One of the most beautiful synths ever made.
I had a Voyager XL, and for similarly priced units, the A-4 blew it away, so I sold my Moog. The GRP has much more power and flexibility and the fidelity is superior to the Voyager, IMO. If you are looking for a Model-D sound, then buy a Model D, cause even Moog’s re-issue doesn’t sound like a D to me. The GRP is not a Moog clone.

This is one HELL-of-a synthesizer, semi-rare. Will retain its value; so buy it, use it, then sell it for what you paid for it.

You will notice one small blemish in the last photo. This is NOT a scratch, merely a narrow SMUDGE (about 1/2 inch) that can easily be covered with the matching stain from a Minwax Wood Finish Stain marker pen. The cabinet appears to be a walnut veneer. Other than that, the unit looks brand-new. I am second owner, neither of us were smokers, home studio only, never live gigged, super low hours, only we touched it.” Click here to search for synths on eBay

Categories GRP

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Akai VX90

“For your consideration I have a ultra rare AKAI VX-90 rack. It sounds amazing and is 100% functional. It comes from a clean smoke free home. It comes with the original rack ears and hardware. This is a VCO synth with a lot of cool features. All of the waves have pulse width. You can stack half or all of the voices in unison and then detune them for a super fat sound. Its really easy to edit from the front panel. It also has an input to process external audio form AKAI samplers. The only thing worth mentioning it that the power cord has been shortened to fit in a rack, it does not affect the synth whatsoever.” Click here to search for synths on eBay 

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Kawai K4r

“Up for auction is a Kawai K4r Synthesizer Rack Mount w/ Power Cord. Works great, has cosmetic wear which is shown in pictures. ” Click here to search for synths on eBay 

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Future Retro Orb

“Like new Future Retro Orb sequencer. Comes with power supply and manual.
Works perfectly.” Click here to search for synths on eBay 

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Octave Cat SRM II

“This one is brand new in the original box with the manual + brochures. It is working 100%! Prior to the listing, it had been calibrated as it’s been sitting wrapped in it’s box for over 37 years. I have several available! This model is last of the series, the SRM-II. It uses CEM 3340 (oscillators) and a SSM 2044 (filter). ” Click here to search for synths on eBay 

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Oberheim Xpander

“Hey there friends! This Oberheim Xpander Analog Synthesizer is in excellent condition, (except for a small scuff on the front left), as you can see from the pics! All functions are perfect! Has the most amazing sounds and comes with some extra bonus midi cables that allow you to download a whole bunch more amazing patches online! The sweetest synth that some believe could be the best one ever made! Used on a few tracks in DJ Q-bert’s Thud Rumble studio! I’m also including a BONUS Anvil Case to keep the Synth safe!” Click here to search for synths on eBay 

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Moog Taurus

“Looks to be in excellent shape, but I have no way of trying it. So even though I assume it to be fully operational I caint verify it and need you to be aware when bidding” Click here to search for synths on eBay 

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Moog Taurus II

“I have no idea if it works or not so I’m listing for parts or repair” Click here to search for synths on eBay 

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Moog Prodigy

“I just noticed that I didn’t put all the white switches back on after cleaning them. They WILL be included with the synth!

There is the Moog Prodigy and then there is THE Moog Prodigy with External Controls. This is the more desirable one that has:

– S-Trig In/Out
– Kybd In/Out
– OSC In
– VCF In
– Sync In

These controls allow you to achieve deep bass notes as well as being able to connect the synth to a sequencer.

I am not the original owner. I purchased this synth for a studio project where we needed those nice thick, dimensional analog tones that cannot be achieved through soft-synths or from the newer digital synths. If you want the real deal, here it is!

Cosmetically I would say it is in good condition for a ~30 year old vintage synth. It is definitely aged, but that is part of the beauty of a vintage analogue synth. If you want mint, this isn’t your synth.

Please Note:
As mentioned, I am not the original owner and so I do not know much about the history of this particular unit (where its been, maintenance, etc.), but what I can tell you is that it works as designed. Every key, every pot, every switch works. It plays in tune. During the recording process we had it connected to an Analogue Solutions Oberkorn3 analogue sequencer, and the Prodigy worked perfectly.” Click here to search for synths on eBay

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Moog Prodigy Xpander Prototype

“This is one of the rarest Moog synthesizers ever produced!

This is the prototype of the Moog Prodigy, called the Moog Prodigy Xpander. This is the ONLY one I’ve ever seen, and I visited the Moog factory so many times, that when the employees saw me performing with my band, they assumed I was an employee too!

This tabletop module was going to compete with the Oberheim SEM, but Moog Music in the late 70’s decided to go with the keyboard version of the Prodigy, and many of them are still in service today.
It works perfectly, sounds incredibly fat, and it’s oscillator sync sounds so much better than other analog synths.

I was a rep/dealer/consultant in the 70’s and 80’s to many golden age synth companies including Moog Music, (Williamvsille, and Buffalo factories,) Polyfusion, Sequential Circuits, Oberheim, Pearce Amps, and was a consultant to Les Paul.

Owning this for synthesists, is analogous to being a guitarist and owning Fender Stratocaster 001.

Most Moog experts weren’t aware of this prototype, but being a rep, and living just 10 miles from the Moog factory, gave me an advantage to obtain rare pieces like this. Tony Marchese was the head engineer on this rare piece.

I met Bob Moog at the age of 19 in 1973, and he became my mentor, helping me in those early days to learn all I could about electronic music.
You’ll need a MIDI to CV convertor to use this.

Obviously, this is for true Moog fans, and collectors.
There are no refunds or returns for this item, so please be aware of exactly what you’re buying” Click here to search for synths on eBay

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Roland TB-303

“Roland TB 303 in great shape for age.
Clean, fully refurbished – new capacitors, tasters
Installed Quicksilver CPU (original CPU comes with unit in a separate box)

rare chance to get one in this condition since most of TB303 units are over used and don’t look good.” Click here to search for synths on eBay 

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Roland Alpha Juno 1

” Vintage Roland JUNO 1 Keyboard, Synthesizer in Original Box, Vintage Roland JUNO 1 Keyboard, Synthesizer in Original Box. Unit is in very nice clean condition. Looks like it was used very little. Unit has been tested & works great. Comes with power cord, manual, music stand only. NO pedal is included. Case has 2 minor cracks at the end screws as pictured. ” Click here to search for synths on eBay 

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Roland Alpha Juno 2

“Roland Alpha Juno 2 Analog Synthesizer In EXCELLENT condition.

Probably one the best used Alpha Junos out there, this is in great shape with original box and manual.

Sounds and works perfectly. Needs internal battery replacement.” Click here to search for synths on eBay 

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Roland TB-303

“Used Roland TB 303 with Kenton CV Gate.

It also comes with the original bag. And includes BLUE LED’s and filter extension modifications.” Click here to search for synths on eBay 

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Roland D-20

“Vintage Roland D 20 Synth 61 Key Keyboard used but working condition.
All buttons working no problem at all.
2DD floppy disk for D20 Preset” Click here to search for synths on eBay