via this listing
Additional Perfect Circuit listings
Sunday, January 04, 2026
Roland JP-8000 Virtual Analog Keyboard Synthesizer
Note: links to listings are affiliate links for which the site may be compensated.
via this listing
Additional Perfect Circuit listings
via this listing
Additional Perfect Circuit listings
Roland Juno-60 Polyphonic Analog Keyboard Synthesizer SN 303622
Note: links to listings are affiliate links for which the site may be compensated.
via this listing
Additional Perfect Circuit listings
via this listing
Additional Perfect Circuit listings
Roland MKS-70 Super JX Vintage Synthesizer Sound Module
Note: links to listings are affiliate links for which the site may be compensated.
via this listing
Additional Perfect Circuit listings
via this listing
Additional Perfect Circuit listings
Marion Systems Tom Oberheim SEM PRO MIDI&CV SN 0946 w/ Original Box
Note: links to listings are affiliate links for which the site may be compensated.
via this Reverb listing
Note Marion Systems on the box.
"This is a Marion System SEM PRO, reissued by Tom Oberheim and purchased in 2016.
It is a one-owner item with no major scratches or damage.
Only the SEM PRO features Tom Oberheim's handwritten signature.
The original box is included, but the internal custom foam padding is missing.
The base of the adapter looked fragile, so it was reinforced with tape. Since it's a 24V adapter, the Marion System logo was laser-engraved to prevent mix-ups.
This adapter itself is made by Akizuki Tsusho. If you prefer a pristine unit, please purchase it directly from them."
via this Reverb listing
Note Marion Systems on the box.
"This is a Marion System SEM PRO, reissued by Tom Oberheim and purchased in 2016.
It is a one-owner item with no major scratches or damage.
Only the SEM PRO features Tom Oberheim's handwritten signature.
The original box is included, but the internal custom foam padding is missing.
The base of the adapter looked fragile, so it was reinforced with tape. Since it's a 24V adapter, the Marion System logo was laser-engraved to prevent mix-ups.
This adapter itself is made by Akizuki Tsusho. If you prefer a pristine unit, please purchase it directly from them."
Modal (Modulus) Electronics 002 (RARE): w/Digital I/O card, boxed, serviced
Note: links to listings are affiliate links for which the site may be compensated.
via this Reverb listing
via this Reverb listing
JoMox Moonwind Filter Tracker
Note: links to listings are affiliate links for which the site may be compensated.
via this Reverb listing
You can find demos in previous posts here. Note the listing is for the MkI model. There is also an MKII as you can see in previous posts.
via this Reverb listing
You can find demos in previous posts here. Note the listing is for the MkI model. There is also an MKII as you can see in previous posts.
Yamaha CS-30 Monophonic Synthesizer SN 1513
Note: links to listings are affiliate links for which the site may be compensated.
video upload by CS Games
Note the video above is from 2015. It's featured in the listing below, and has not been featured on the site before now.
via this Reverb listing
"Huge number of knobs, fantastic sequencer, and many clever routing possibilities
Simply the best of monophonic CS serie !"
video upload by CS Games
Note the video above is from 2015. It's featured in the listing below, and has not been featured on the site before now.
via this Reverb listing
"Huge number of knobs, fantastic sequencer, and many clever routing possibilities
Simply the best of monophonic CS serie !"
Moog Pocket Protector
Note: links to listings are affiliate links for which the site may be compensated.
via this eBay listing
"Original Moog Music branded pocket protector, featuring the classic Moog logo associated with analog synthesizers and electronic music.
Likely produced as a promotional or staff item, intended for use by technicians, engineers, or employees. A clean, minimalist design strongly tied to Moog’s legacy in electronic music and synthesizer history."
It was a promotional giveaway back in 2011.
via this eBay listing
"Original Moog Music branded pocket protector, featuring the classic Moog logo associated with analog synthesizers and electronic music.
Likely produced as a promotional or staff item, intended for use by technicians, engineers, or employees. A clean, minimalist design strongly tied to Moog’s legacy in electronic music and synthesizer history."
It was a promotional giveaway back in 2011.
Korg Polysix with Kiwi Technics Kiwisix
Note: links to listings are affiliate links for which the site may be compensated.
video upload by ohm_studi_ohm
"Demo of some patches I programmed on the Korg Polysix. This unit has the KiwiSix CPU board installed that adds many features (like MIDI, sequencing, 512 presets etc) without changing the sound of the synth.
The polysix is a true 6 voice VCO VCF VCA analog synth and it sounds great. By design however the enveloppe is slow and the sound a bit dark due to an added post FX VCF (LM13600). A simple mod allows to bypass this and let the synth shines. With this mod you get a very snappy and funky synth whose SSM2044 filters gets very well along the built-in chorus/phaser/ensemble FX. This unit has this mod done.
From funky keys, to lush string pads, the P6 has a very large scope despite its very limited features.
Only bad point of the P6 is that it has a fairly high noise level. Some improvement can be made like in this unit by adding more ground wires, applying copper foil on the bottom case and adding ferite around wires."
via this Reverb listing, also on eBay
"INSTRUMENT IS FOR SALE AT REDUCED PRICE ON EBAY DURING JANUARY ONLY"
Pics of the inside below.
"Serviced and fully working classic 6 voices analog poly synth.- brand new KiwiTechnics Kiwisix CPU board that adds lot of features (MIDI IN & OUT, CC, sequencer, 512 presets etc)
- all electrolytic capacitors were replaced (the P6 has many of infamous Panasonic CE capacitors that leak after decades of use)
- post FX VCF mod: this simple mod gives the P6 faster enveloppe and fuller sound. A must do on all P6, check demo.- improvement of the ground design by adding more and thicker ground wires, copper tape on the bottom case and ferrite around the data wires
- full calibration
Unit is fully working and sounds great. As expected with these Polysix there still is some light background digital noise due to design, but nothing major, check demo to hear how it sounds.
Cosmetic is good with some scuffs here and there, especially on the case as it often is the case on P6. One switch cap ("hold") is not original."
video upload by ohm_studi_ohm
"Demo of some patches I programmed on the Korg Polysix. This unit has the KiwiSix CPU board installed that adds many features (like MIDI, sequencing, 512 presets etc) without changing the sound of the synth.
The polysix is a true 6 voice VCO VCF VCA analog synth and it sounds great. By design however the enveloppe is slow and the sound a bit dark due to an added post FX VCF (LM13600). A simple mod allows to bypass this and let the synth shines. With this mod you get a very snappy and funky synth whose SSM2044 filters gets very well along the built-in chorus/phaser/ensemble FX. This unit has this mod done.
From funky keys, to lush string pads, the P6 has a very large scope despite its very limited features.
Only bad point of the P6 is that it has a fairly high noise level. Some improvement can be made like in this unit by adding more ground wires, applying copper foil on the bottom case and adding ferite around wires."
via this Reverb listing, also on eBay
"INSTRUMENT IS FOR SALE AT REDUCED PRICE ON EBAY DURING JANUARY ONLY"
Pics of the inside below.
"Serviced and fully working classic 6 voices analog poly synth.- brand new KiwiTechnics Kiwisix CPU board that adds lot of features (MIDI IN & OUT, CC, sequencer, 512 presets etc)- all electrolytic capacitors were replaced (the P6 has many of infamous Panasonic CE capacitors that leak after decades of use)
- post FX VCF mod: this simple mod gives the P6 faster enveloppe and fuller sound. A must do on all P6, check demo.- improvement of the ground design by adding more and thicker ground wires, copper tape on the bottom case and ferrite around the data wires
- full calibration
Unit is fully working and sounds great. As expected with these Polysix there still is some light background digital noise due to design, but nothing major, check demo to hear how it sounds.
Cosmetic is good with some scuffs here and there, especially on the case as it often is the case on P6. One switch cap ("hold") is not original."
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MATRIXSYNTH - EVERYTHING SYNTH
© Matrixsynth - All posts are presented here for informative, historical and educative purposes as applicable within fair use.
MATRIXSYNTH is supported by affiliate links that use cookies to track clickthroughs and sales. See the privacy policy for details.
MATRIXSYNTH - EVERYTHING SYNTH
