Sequential Circuits Prophet-10 promotional sticker from 1981.
Prophet-10 Operations Manual with Polysequencer Operations Manual Collector Quality Condition ** SOLD
Prophet-10 Synthesizer Operations Manual and Polysequencer Operations Manual * CM1016B Collector Quality Condition ** still stored in plastic bag
Used Braemer micro-cassettes $20 each
Braemer micro cassettes are for Prophet-10 tape drive mounted on left panel.
Used Exatron stringy cassettes $15 each
Exatron Stringy Tape Drives are mounted in the front under the Sequencer.
The Prophet-10 Operating System consists of 3 ROMs. OS Version 4.0 is for Prophet-10s with the front mounted Exatron tape drive, Version 5.0 is for Prophet-10s with the side mounted Braemer tape drive, and Version 6.1 is for all Prophet-10s with MIDI installed. A MIDI kit installation will permanently disable access to the Exatron tape drive and sequencer, but the Braemer tape drive and sequencer will continue to operate with MIDI installed. The 3 socketed MIDI OS ROMs are labeled as 0, 1, and 2.. and can be seen in the adjacent picture. The MIDI ROMs are labeled 0TEN6.1, 1TEN6.1, and 2TEN6.1
Prophet-10 CPU board with 3-chip set Operating System.
ProphetŪ10 v6.1 OS ROMs * SOLD
Version 6.1 Operating System is ONLY for a Prophet-10 with MIDI installed.
Non-MIDI version OS v3.0, v4.0, v5.0 remain available for $79 each.
The Prophet-10 Diagnostics with basic instructions included is no longer available. The 2-chip Diagnostics ROM set could install factory programs into memory, and work in any Prophet-10 regardless of tape drive type, MIDI or no MIDI. The 2 ROMs are installed into the OS socket positions 0 and 1, & position 2 remains empty. The ENABLE/DISABLE switch on the back panel must be set to the ENABLE position in order to run all diagnostics routines AND install factory programs into memory.
Used Original ProphetŪ10 parts
power switch $15 ** 1/4" jack $15
1/4" jack/cable assembly $22
Email us for current availability ** Shipping is Additional
Power switch * Audio Jack
1/4" jack & cable assembly.
Top Panel Hinge Locks ***SOLD***
#I-417/LM317K for the Prophet-10 variable power regulator $25
#I-417/LM317K variable power regulator $25
Original Transformer & Heatsink $45
Original Prophet-10 Transformer & Heatsink
****Prophet-10 Corcom Power Jack*** Fuse & Voltage Select Card included **$35**
Used Original Prophet-10 Corcom power jack
Housing, Fuse, & Voltage Select Card
Used Original Board#8 for ProphetŪ10 $25
<< PDFs of Original Sequential Circuits Prophet-10 Spec Sheets from 1980
Last Update: Nov. 24, 2025
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