Prophet 600

“This Prophet 600 looks amazing for its age. All the knobs function and all LEDs light up in response to the touch pads. I re-loaded the 100 factory preset programs back into it to give it a fresh start and they play,sound and match their descriptions OK. I’ve never had this keyboard worked on and after ten years of home studio use followed by 23 years of storage in my closet here’s what went wrong:

1.) On a few programs, some keys are dead or weak, while in the rest of the programs all the keys sound out as they should. It exhibits this behavior since I pulled it out of storage. I probably should replace the battery but I don’t want to put any work/money into it unless I could verify it would fix the problems.

2.) Tunes itself OK but, it seems like an oscillator gets a little wavy at times. (De-tuning noticed during chords). The oscillators have never been tuned, gets a little better as it warms up

3.) That being said overall this synthesizer sounds great and I believe a little technical service will revive this rare and (truly vintage classic) analog synthesizer. NOTE: While taking photos I noticed it appears to have been factory signed. Pretty faded though” Click here to search for synths on eBay

“THIS SALE IS FOR Vintage Sequential Circuits Prophet 600 Synthesizer PROJECT

INCLUDE: NO POWER CORD. UNTESTED

HISTORY: ITEM CAME FROM STATE SURPLUS AND IT IS “AS IS” NO RETURN “ Click here to search for synths on eBay

“Great sounding piece I’ve rarely used over the years. Needs a new home. I got it in the mid 90’s exactly as is shown. Signed.

Keyboard works fine bit has a cig burn and cracked key. The entire replacement of the keyboard is about 100$ but I never had a problem with it, I’m more concerned with how it sounds (awesome) then the cosmetic issues.” Click here to search for synths on eBay

“Great working condition”
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“Classic analog synth with amazing fat leads, lush brass, atmospheric pads and filter sweeps from early-mid 1980s, with MIDI, comes with hard case.

The high A key was repaired professionally and is fully functional, just shows some slight discoloration. See pics for wear/scratches on wood and rest of body.

Membrane keypad and LED display are new (exact replacement part), and were professionally installed.

I played this keyboard for years in a gigging/recording band and loved the amazing analog sounds you could coax out of this thing. It has a unique and undeniable character. Has real heart as an instrument and I hate to see it go.

Hard Case is made of thick plywood covered in felt with metal corners and hardware. Inside is foam. Very heavy-duty build and is valued at ~$125 on its own–included with your purchase at no extra charge.” Click here to search for synths on eBay

“NOT WORKING! Will not turn on. I have owned this synth since it was new for my home studio. See pics for superb cosmetic condition. Never gigged, never left it’s climate-controlled, smoke free environment. I do not know what the issue is, but before it went into storage I tested it and found several keys did not play. This was always played thru MIDI from my DX7, so I didn’t notice this before that. Hopefully someone familiar with these can bring it back to life-these instruments have a wonderfully rich sound and deserve to be played.

It will ship with the original Owner’s Manual and a HYBRID flight case that I had made for it when new.

The Prophet-600 is a 6-voice polyphonic analog synthesizer with a 5-octave, 61-note (C-C) keyboard. Each voice consists of two VCOs, two VCFs, and two VCAs. Each of these components has its own independent ADSR envelope. Each Prophet-600 voice uses 2 sets of Curtis Chips for its architecture.”
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