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Sequential Circuits Six-Trak

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“CONDITION: SOLD AS IS! I am not an expert when it comes to this item & have no idea how to properly test it. The unit appears to turn on and respond to pretty much all the inputs I selected, please watch the provided video for the test I did. This is the extent of the testing that was done which is why it’s sold for PARTS/REPAIR. Expect this unit to not fully function or need some work, but if it ends up being fine then you lucked out!
Shows some normal signs of cosmetic wear & age. Some marks and signs of aging throughout, the wood has some minor flaws. Overall its in pretty nice shape for the age. The cord is intact with no issues. We are open to offers or local pickup in NJ to save on shipping” Click here to visit listing on eBay

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ARP 2600 with ARP 3604 Keyboard

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“Here’s your chance to own one of the first ARP 2600’s ever made–the coveted “Grey Meanie”. Before the “Tonus Logo” ARP 2600’s housed in a tolex case, ARP made 34 of these Grey Meanie synthesizers in 1971, housed in a unique trapezoidal case. This includes the matching 3604 keyboard controller and power cord. And, unlike a unit that just sold for more, this one includes the original ARP filter module, not a modern reproduction.

Both the synthesizer and keyboard controller were serviced by Synthchaser (completed in January 2025). Work done included:

All tantalum capacitors replaced (except some in submodules)
Sliders cleaned and new shafts and knobs installed (one slider replaced)
Full calibration under oscilloscope
Power supply recapped
3604 Keyboard refurbished: New key bushings, Keycaps ultrasonically cleaned, Bellcrank caps cleaned and relubricated, New keyboard cables

This synthesizer contains the following modules (all genuine ARP modules unlike in some more expensive Grey Meanie you may have seen which has modern reproduction modules)

3x 4027-1 VCO
4012 VCF
4010 VCA
4014 Ring Modulator
4015 Sample And Hold
4020 ADSR
4022 Noise

The synthesizer is in decent condition, with some dents and scratches to the case, and three holes on the main unit and five on the keyboard controller that have been plugged from old mods that have been removed. There’s also a Moog style ribbon controller mounted on the keyboard controller that has been disconnected and is not functional. Please see photos. Includes an original style oval power cord. The cables that connect the keyboard controller to the synthesizer are not original. One slider was replaced with a reproduction slider, the rest are originals.

Friendly reminder that the ARP 2600 uses Tini-D jacks, which are a slightly larger diameter than standard 3.5mm patch cords. The synthesizer was tested with Tini-D patch cords (not included). While 3.5mm patch cords will often work, their connection will be less reliable than Tini-D patch cords. These cables can be purchased from Buchla.” Click here to visit listing on eBay

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Oberheim Voltage Controlled Filter

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“This unit was MODIFIED to accept an external control voltage through the extra input jack and extra footswitch added to the unit. I have not tested the external Voltage Control function but have verified the voltage controlled filter/envelope follower works. I don’t have the electronics knowledge to troubleshoot or completely test this unit. This is being sold “as-is”.

This is the same circuit as the MAESTRO FSH-1 FILTER PEDAL. Oberheim licensed Maestro to build their similar unit. ” Click here to visit listing on eBay

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E-mu Drumulator Project Machine

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“For sale is a rare vintage Emu Systems Drumulator Model 700 drum machine. It includes the original manual (and this unit likely came from original owner as well). It’s tested but has a few issues:
– The data slider is not functioning and feels off at the top of its travel. The tempo does not change, the accent switch doesn’t respond well, and the level doesn’t change or display either.
– The unit seems to freeze up in certain situations
– Overall inconsistent and many switches are not working or working well.
– “C” pad has multi-triggering issues
– Passes signal (makes some sounds).” Click here to visit listing on eBay

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Oberheim Strummer

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“In great condition no issues everything works as you should. Can we use with any synthesizer with MIDI but I used it a lot with my vintage synthesizer such as Casio CZ 3000 and roland jx8p. Very fun to use. Giving them abilities not present originally.” Click here to visit listing on eBay

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Moog Memorymoog

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“I have owned this Moog for 30 years. I am not a musician and don’t know how all the functions work. I am an Electronics Technician.
At power on, it will not produce sound until the “Programmable Volume” control is rotated. This could be normal, I’m not sure.
After that it is functioning ok. Rotating all the controls will get results on the numeric display along with changes in sound.
I have set it up every 10 years or so to play with. I am always amazed at the sounds it makes while trying different settings.
I can get sounds that take me back to my ELP, Synergy and Switched on Bach album days in the 70’s.

Overall its in great cosmetic condition. I just replaced the foam in the case because the old foam was bad.
I also just replaced the memory backup battery, the old battery was dead.
The keys work good, one key has a small crack but is stable, 6th white key from the left.
The following has not been tested, MIDI, foot peddles, Memory functions.
When “Auto Tune” is pushed most lights go out and come back on after 10 seconds, display shows same indication as before.
All controls function on the 3 main oscillators. Some push buttons require pushing harder to get light to come on.
I am selling local pickup only (Colorado Springs) but may consider shipping at a later date. I am open to suggested shipping choices.
If you would like to try it out, I can set it up at my repair shop (Norbern Electronics Inc) Mon – Sat ” Click here to visit listing on eBay

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Moog Micromoog Project Machine

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“MOOG MICROMOOG SYNTHESIZER WITH HARDCASE PARTS ONLY, UNTESTED

Returns accepted, but return shipping paid by buyer.
Refund depends on returned condition.

Parts Only, Untested. Please see pictures.

Thank you for looking.” Click here to visit listing on eBay

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Roland JV-1080

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“You are bidding on a Roland JV-1080 synthesizer rack. Works great. Light wear as pictured. Comes with power cord. Ships FedEx Ground.” Click here to visit listing on eBay

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Roland D-10

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“This listing is for a vintage 1988 Roland D-10 Multi Timbral Linear Synthesizer Keyboard in good physical and working condition.” Click here to visit listing on eBay

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Roland TB-303

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“No Reserve. A true Ebay auction with free, insured shipping anywhere in US!

Mint condition! ” Click here to visit listing on eBay

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Roland Juno-106

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“Like new condition kept in a smoke-free studio.

It works and sounds amazing.

Rarely used.

Free Shipping.

Serious buyers only. ” Click here to visit listing on eBay

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Roland JP-8080

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“For sale is a Roland JP-8080, a synth that needs no introduction for electronic music producers. Revered as a cornerstone of house, trance, and techno, the JP-8080 is the rack-mounted evolution of the legendary JP-8000, known for its lush pads, cutting leads, and earth-shaking bass. Favored by artists like Calvin Harris, Crystal Castles, and Lorenzo Senni, This powerhouse delivers the iconic Super Saw wave that shaped an entire generation of dance music and remains just as relevant today. Additionally, the JP-8080 offers deep programming options with dual oscillators, ring modulation, and sync capabilities that allow you to sculpt sounds ranging from hypnotic trance arpeggios to thick analog-emulation bass tones and silky evolving pads.

This particular unit is in excellent working condition, as seen in the photos provided. The faceplate, knobs, sliders, and input/output jacks are clean and fully functional, with only light cosmetic wear. All MIDI ports, audio outs, and controls are fully operational, ensuring seamless integration with modern studio setups. The hands-on interface makes sound design intuitive, giving you extensive filter and envelope controls, a robust arpeggiator, and real-time tweakability that brings the synth to life.” Click here to visit listing on eBay

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Roland JD-800

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“This JD800 does NOT have the dreaded keyboard glue issue (it was fixed many years ago before it became a problem) – however please read for known issues and restoration work.

Hate to part with this as its been a labor of love for several years.

I picked it up from a church in Manila, The Philippines (if you can believe it!) while travelling. Plastic end caps look pretty beat but the metalic face is in good shape. End caps could be replaced to make it look as beautiful as it should be.

Most buttons and sliders did not work so I ordered and replaced w/ new old stock roland parts….soldered them all in one at a time and cleaned the insides. Sliders and buttons are now smooth and easy like new. Modified the PSU for 110V.

Keyboard was 100% functional until a drop a few years ago cracked the right plastic end cap and unseated the ribbon that connects the keyboard (notoriously a PITA to seat correctly). I was able to get it to reseat but lost functionality of the top right 5 keys (see pic). Keyboard occaisonally “freaks out” and starts triggering randomly once every few weeks and requires a power cycle. The above are annoying but not worth taking it apart and trying to re-seat the ribbon IMHO, so I’ve dealt with it.

So we have a JD800 with no glue issues and 90% new sliders and buttons that sounds absolutely fantastic…but has some livable issues. If you are technical and can source parts you could replace the end caps and re-seat the ribbon, or you could take the guts out of this unit and place into a cosmetic perfect unit that had the glue issue and you’d be set.” Click here to visit listing on eBay

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Korg 01/W FD

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“One key need to be repaired

LED backlight not working ” Click here to visit listing on eBay

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Korg DSM-1

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“The Korg DSM-1 is a rack mount synthesizer that is a rack version of the DSS-1 sampler synthesizer. It features synth keys and was manufactured in Japan by Korg. The DSM-1 offers a compact and convenient way to access the powerful capabilities of the DSS-1 in a rack-mounted format, making it ideal for studio use. As a versatile and high-quality synth, the DSM-1 is a sought-after piece of pro audio equipment for musicians and producers looking to incorporate unique and vintage sounds into their music productions.

Korg DSM-1 1987-8 3 rack space and mountable version of the DSS-1 Sampler Synthesizer that was popular in the late 80s.

This truly is a monster made in Japan, and I am guessing you all remember this as I am sure you all know what this is.

The operating disk that I have looks to have loaded properly. I did power it up as seen in the pictures and it was working fine.

The-mix volume knob is a little stiffer than the rest, but still turns fine.

All of the front mounted buttons, knobs, LED lights, & adjustable green display all work well with no issues.

All of the 1/4″ jacks, Midi ins and Outs, AC mains 2 prong plug to the fuse holder are all very clean and all in working order.” Click here to visit listing on eBay

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Korg PolySix

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“Up for sale, a 1980s Korg PolySix programmable polyphonic vintage synthesizer in exceptional condition, fully serviced and complete with the original case.” Click here to visit listing on eBay

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Korg MS2000R

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“Clean lightly used Korg MS2000R (Rack). Beautiful metal flake paint you can see better in the closeups. Power knob has been replaced with a low profile one. There is a light scratch on the lower right and some black pixels in the LCD corners but overall very little wear and tear. Not beat up like some auctions out there. 100% working, from a smoke-free home studio.” Click here to visit listing on eBay

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Yamaha FB-01

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“Yamaha FB-01

Half Rack FM Synth

See Detailed Photos ” Click here to visit listing on eBay

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Yamaha FB-01

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“Yamaha FB-01 Frequency Modulation Sound Generator *Fresh Battery* – Classic FM Synthesis” Click here to visit listing on eBay

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Yamaha DX7 Project Machine

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“Condition: For Parts Only: Bad keys, Non-functional, sold as-is, no returns. Ideal for repairs or spare parts.” Click here to visit listing on eBay

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Sequential Circuits Drumtraks

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“Looking for a professional-grade synthesizer? Check out the Sequential Circuits 400 Drumtraks! This powerful machine is perfect for creating intricate drum patterns and sounds, making it a must-have for any music producer. With its sleek design and top-of-the-line features, the Sequential Circuits 400 Drumtraks is sure to impress even the most discerning synthesizer enthusiast. So why wait? Order yours today and start creating amazing music like a pro!

It’s turning on and it plays but 2 Circuits not playing” Click here to visit listing on eBay

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ARP Axxe

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“Up for auction is a Used Vintage Arp Axxe Analog Synthesizer 2313 For Collector.

This synth was part of my recording studio for 40 years and was still working well 3 years ago.The broken piece of wood was like that when it was bought. It turns on but makes no sound. I cannot play anymore, so it’s time to say goodbye.
Will ship with insurance and signature requirement.” Click here to visit listing on eBay

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Teenage Engineering OP-1 Project Machine

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“PLEASE READ BEFORE BIDDING/OFFERING!!!
1. NO INTERNATIONAL BUYERS.
2. DEVICE NO LONGER CAN PERFORM FIRMWARE UPDATES.
3. THE BATTERY BARELY WORKS SO IT’S BETTER IF IT STAYS CONNECTED TO POWER.
4. ON OCCASION THE COLORED KNOBS WON’T WORK BUT USUALLY WORK IF YOU REBOOT IT.
5. ON OCCASION IT TAKES MORE THAN ONE TRY TO TURN IT ON, BUT THAT MAY BE BECAUSE OF PROBLEM 3.

I bought this around 2011 after seeing it featured on Swedish House Mafia’s “One (Your Name).” Used it quite a bit back then, put it away for several years and picked it back up recently when I started learning to use an online DAW and wanted to do more electronic sounds using a keyboard or drum machine. I have since recorded some tracks on it successfully and transferred those files to DAW so this item definitely works. And the versatility in drum and synth sounds continue to blow me away. But when I went to consider buying a new OP-1, I went for another device option entirely due to a lower cost for the same capabilities. But I am a bit sad to part with this device because the visuals, the portability, and the capabilities are so great. PLEASE ask any and all questions you may have before buying and I will do my best to answer. ” Click here to visit listing on eBay

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Oberheim OB-12

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“Oh my, where to begin. This thing is a crystal blue sea of knobs, sliders, buttons, and even a ribbon. This is one of my favorite pieces of all time, and I’m sad to see it go. If you’re a hands-on sound-crafter like me, this is an essential. It has two cracked teeth (pictured above), but functions perfectly.” Click here to visit listing on eBay

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Teenage Engineering OP-1

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“Teenage Engineering OP-1 Synthesizer – Perfect Condition – Hardly Used

This OP-1 is in immaculate condition, used only a handful of times. It comes with its original packaging, including the USB cable. Fully functional and well-cared for. ”
Click here to visit listing on eBay

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Ensoniq EPS Project Machine

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“Unfortunately this unit was left in a damp garage for a long time. I have not powered it up because it looks like it wouldn’t work. Didn’t want to cause more harm. It is covered in mold. Roadie case has rust on the metal parts. Doesn’t come with any extras.”
Click here to visit listing on eBay

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Malekko Oscillator II

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“Malekko Richter Oscillator ii
Used with slight rack rash but in working condition.
One of the cleanest sines in the biz
and phase modulated outputs!

No longer in production” Click here to visit listing on eBay

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Siel DK70

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“siel dk70. Condition is Used. Shipped with USPS Ground Advantage. ” Click here to visit listing on eBay

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Moog Prodigy

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“You are bidding on a Moog Prodigy synthesizer. Missing one key as pictured. Not the best cosmetic shape as pictured. Every key works (except for broken one) and all knobs/switches/wheels seem to function perfectly. Sold as is due to age. Ships FedEx Ground.”
Click here to visit listing on eBay

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Moog Opus 3 Project Machine

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“This Moog Opus 3 powers up and some functions make sounds. A lot of functions do not make sounds or work properly. This Moog is in need of repairs and is being SOLD AS IS. This would be a great project for someone with the know-how to get it fully functioning. Item is in decent cosmetic condition; see photos for details. Serial # is 4100. Does not come with power cord. NO RESERVE!” Click here to visit listing on eBay

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Roland CR-78

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“This item is used and tested working. There are nicks on the edges of item. Power cord was modified. Power cord is included. No other accessories/cables included. Only item pictured will be included. There is wear and tear due to previous use and handling.” Click here to visit listing on eBay

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Roland CR-8000

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“The CR-8000 is the apex of programmable, sync-able, vintage analog drum machines. It has the best analog drum sounds, and it sports ports for three (3) foot pedals (start/stop, re-start and fills), for studio or live performance, plus a sync switch (in/out) to work with sequencers or other modules. The CR-8000 also features an amazing “swing” control with which you can produce a sweet, natural groove every time.” Click here to visit listing on eBay

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Roland JV-2080

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“Roland JV-2080 64 Voice Rack Synth Module synthesizer Excellent Condition. Condition is Used. Shipped with USPS Ground Advantage. ” Click here to visit listing on eBay

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Roland D-110 Project Machine

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“Unit is dirty and has rust and corrosion so there is a good chance it don’t work. Selling for parts or repair only. Powers on and says check internal battery. I don’t have any way to do further testing. The volume knob is loose. Please view the pictures to see the condition of this item. ” Click here to visit listing on eBay

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Roland Juno-106

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“This Roland Juno-106 Six-Voice Polyphonic Keyboard Synthesizer is a great addition to any musician’s gear. With 61 keys and an analog signal path, this synthesizer produces high-quality sound that can be manipulated in real-time using the modulation wheel. Additionally, the built-in effects and USB compatibility make it a versatile tool for any studio setup. This keyboard synthesizer comes with a hard case for easy transportation and storage.” Click here to visit listing on eBay