MATRIXSYNTH

Oberheim OB-X 8-voice & multimode VCF mod

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"Even more of a classic than the OB-Xa, this beauty from around 1981 has been fully serviced in August 2024. It has a very unusual and useful mod where the cassette level switch is re-purposed as a noise switch and the filter can be multi-mode. ***More info: OB-X filter mod based on SEM. The mod uses the repurposed Noise buttons to choose LP/ Band/ HP Filters. Therefore patches can be saved with filter type setting. The noise modes are now accessible via the Cassette Monitor Switch. The new switch for cassette monitor is now mounted inside the synth. Considering the Memory Protect switch is already inside the synth and needs to be switched when loading patches from cassette (or these days a WAV), this new location is not an inconvenience. Most importantly the mods are all non-destructive and can be removed if desired. Also utilises the Magnetic RAM card so no battery is needed http://www.electrongate.com/dmxfiles/mram.html *** Very similar serial number (804109) to the Radiophonic Workshop OB-X, which was 804204. Unusual, really, to have the full eight voices from the factory, because the 6-voice seemed more affordable at the time and still beat the Prophet-5. The price in today's money would have been 16500GBP. Packing 30GBP to include a UK or Euro mains lead."

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Oberheim OB-Xa eight-voice 120 prog classic

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"Classic Oberheim from about 1982, serial number 314015. Original eight-voice, 120 programs, fully serviced in August 2024, with a nice keyboard feel thanks to re-bushing. Switchable voltage so useable worldwide. Packing 24GBP to include a UK or Euro mains lead."

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Dave Smith Instruments Pro-2 Paraphonic Hybrid Synthesizer

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Dave Smith Instruments Prophet 12 Hybrid Keyboard Synthesizer SN 00440

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Roland Juno-6 Analog Keyboard Synthesizer SN 171471

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PPG Wave 2.3

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"Newly overhauled PPG Wave 2.3 produced in the period 1984-87. All the 5 boards, incl. the motherboard, have been thoroughly serviced by a PPG specialist in Vienna. Everything now works perfectly. A full service report can be delivered. The synth has also had the latest OS 8.3 chip installed, which means that you can send sound banks as Sysex files via MIDI."

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Oberheim DMX 8-Voice Drum Machine Signed by Tom Oberheim SN B44706

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Pics of the inside below.

"This DMX was upgraded by Paul White of Electrongate. He used to work at Oberheim back when DMX’s were being made, and he installed the MIDI in and out, which is based on the original design, and he changed the memory from the battery-backup to a longer lasting flash memory. A couple of buttons double trigger, and this can be addressed by just cleaning the contacts using Paul’s method, which could be found on his website. Aside from that, there’s a small mark on a wood corner and the front left edge has a small area where the paint is missing. Other than that, it is in fine shape. I have tried my best to show any imperfections in the photos. If you need more details, let me know. Even the original screen works perfectly.

Tom personally signed the DMX for my brother a few years ago, and it has been so important to them to keep it. There is also no known record of any other DMX having been signed by Tom himself. Like I said, my brother just got all they could out of it, and it would be best for it to go to someone who can keep it in good shape and enjoy it.

Since my brother produced a lot of work for clients with it, all patterns, songs, and sequences will be deleted, except for a couple that they’re leaving on to allow the next owner to understand how it works and to practice. The rest of the memories are blank and available for your own work, of course."

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Yamaha MR-10 Vintage Analog Drum Machine w/ Original Box & Manual SN 25536

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Elka Solist 505 Mono Synthesizer w/ Hard Case SN 2819

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"Elka Solist 505 Mono Synthesizer w/ Hard Case in good cosmetic and functional condition. Amazing preset synthesizer that is quite rare and from what I read online has a Moog style filter inside. To note, while everything functions without issue, the volume, cutoff filter, and wow sliders could use a cleaning as there is some noise while adjusting them. In addition, the case holding the top part of the synth to the bottom section of the synth is not fully secured on the right hand side of the synth and will need to be serviced to reattach it fully. Also of note, the synth is 220V and will need a step down transformer to function in the US. Includes hard case pictured."

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