Sequential Circuits Prophet 600 w/gli gli upgrade & hard case.

Hi everyone, I bought this unit new and used it extensively in my studio during the 80's and 90's but has been sitting unused for the for the past 20 years. 

As you can see by the invoice the unit has been recently serviced and updated with the gli gli upgrade. The unit functions flawlessly. I must admit I had some second thoughts about selling it when I plugged it in to test. WOW... the gligli update is phenomenal!!! I wish it had been available "back in the day". The only real cosmetic flaws are some minor scratches on the bottom of the case due to a faulty keyboard stand and some mild scratches in the wooden end caps. 

I have a travel case that has also been sitting that I will use for shipping and include in the sale. The unit will be bubble wrapped and packaged for safe travel. 

Basic info: The Prophet 600 was the first commercially available synth to implement MIDI!! It's a fun synth. Its big brother is the legendary . The P600 is very affordable today and is a great buy. Models with the newest software will enjoy polyphonic MIDI implementation and up to 100 memory patches to store their own sounds! The sound of the Prophet 600 is brighter than that of a  but still just as funky.

The P600 has two oscillators per voice with sawtooth, triangle and variable pulse waveforms. The oscillators can be individually tuned or synced together. Similar quality VCF and VCA sections from the Prophet 5 can be found here too! The P5's Poly-Mod section has also been passed onto the P600.

The Gligli upgrade: The  is a 6-voice polyphonic analog synthesizer released in 1982. It was the first commercially available synth to include MIDI functionality. The 600's analog voice's are controlled by a Zilog Z80 CPU. Though state-of-the-art at the time of its release, the Z80's specs means the synth can feel limited and slow to respond to changes compared to modern instruments.

Luckily, synthesizer enthusiast & engineer  has written  for the Prophet 600, designed to run on a . Replacing the 600's Z80 with a Teensy++ running Gligli's firmware adds a long list of features to the classic synth, including:

• Increased resolution for sound parameters
• Faster, smoother amplifier and filter envelope generators
• New LFO function generator with a wider range
• Dedicated vibrato
• Unison detune
• Mix Overdrive
• Full Midi In control of parameters
• Improved tuning procedure

Swapping out the Z80 for the Teensy++ is a relatively simple process, and can easily be reversed if you decide you prefer the 600's original functionality.