SequentialCircuits.com

Home of the PROPHET® and all SEQUENTIAL CIRCUITS instruments.

***Sequential Circuits Prophet-T8*** 73-note E to E prototype January 1982
******* Prophet-T8 Prototype in Sequential Circuits Engineering Lab January 1982 ******* This Prototype was designed in 1981 with a 73 note E to E keyboard ***************Copyright © 2024 Wine Country Productions Inc.***************
SURVIVAL * SURVIVAL * SURVIVAL Original Prophet-T8 Parts & Manuals
Prophet-T8 CEM Integrated Circuits **** Original ICs *** NOT Clones **** 3 Drop-in Replacement CEM ICs $255
#I-321/CEM3340 VCO IC * #I-327/CEM3360 VCA IC * #I-331/CEM3372 Signal Processor IC
A Prophet-T8 has 16 CEM3340 VCOs, 8 CEM3372 Signal Processors, & 5 CEM3360 Dual VCAs.
One #I-321/CEM3340 VCO IC, one #I-327/CEM3360 VCA IC, and one #I-331/CEM3372 Signal Processor IC SHIPPING INSIDE THE USA.
$255.00
One #I-321/CEM3340 VCO IC, one #I-327/CEM3360 VCA IC, and one #I-331/CEM3372 Signal Processor IC SHIPPING OUTSIDE USA.
$255.00
CEM ICs available individually while supplies last
Contact Wine Country for CEM IC availability

Original #I-321/CEM3340 VCO IC $115
Original #I-327/CEM3360 dual VCO IC $25
Original #I-331/CEM3372 Signal Processor IC $185

The Prophet-T8 requires sixteen (16) #I-321/CEM3340 VCO ICs, 
eight (8) #I-331/CEM3372 Signal Processor ICs,
and five (5) #I-331/CEM3360 dual VCA ICs to operate.

A failure in any one of these ICs will result in a bad voice.
#I-327/CEM3360 Dual VCA IC tested & qualified in a Prophet-T8 SHIPPING INSIDE USA.
$25.00
#I-327/CEM3360 Dual VCA IC tested & qualified in a Prophet-T8 SHIPPING OUTSIDE USA.
$25.00
Click or Tap on pictures to enlarge.
#I-331/CEM3372 Signal Processor IC tested & qualified in a Prophet-T8 SHIPPING INSIDE USA.
$185.00
#I-331/CEM3372 Signal Processor IC tested & qualified in a Prophet-T8 SHIPPING OUTSIDE USA.
$185.00
Original #I-321/CEM3340 VCO IC SHIPPING INSIDE USA.
$115.00
Original #I-321/CEM3340 VCO IC SHIPPING OUTSIDE USA.
$115.00
Prophet-T8 control panel $198
Image: 
Prophet-T8 Front Panel Housing metalwork pictured SHIPPING INSIDE USA.
$198.00
Prophet-T8 Front Panel Housing metalwork pictured SHIPPING OUTSIDE USA.
$198.00
2 Walnut Spreaders for Prophet-T8 $38 Front Rail and Center Cross Beam
*****Prophet-T8 front rail and center crossbeam walnut wooden spreaders for $38***** ****47 inches long****
Prophet-T8 front rail and center crossbeam walnut wooden spreaders SHIPPING INSIDE USA.
$38.00
Prophet-T8 front rail and center crossbeam walnut wooden spreaders for $38 SHIPPING OUTSIDE USA.
$38.00
NOS Prophet-T8 pitch/mod box $25
Original New Old Stock (NOS) Prophet-T8 Pitch/Mod Box $25

Prophet-T8 NOS Pitch/Mod Box SHIPPING INSIDE USA

$25.00

Prophet-T8 NOS Pitch/Mod Box SHIPPING OUTSIDE USA

$25.00
* Critical Component for T8 keyboard * #T-014 Optical Sensors *** 15 for $25
The #T-014 is an optical sensor that measures key veolocity.
The Prophet-T8 has a 76-note (A to C) velocity sensitive keyboard.
Two #T-014 sensors per key for 76 keys = 152 #T-014 key sensors
Critical Component * each T8 key uses 2

T-014 Prophet-T8 keyboard Optical Sensors: 15 pieces SHIPPING INSIDE USA

$25.00
Click or Tap on picure to enlarge
Prophet-T8 Tech Manual TN1008A $58
 TN1008 is technical documentation that includes 18 full size schematics and factory service procedures for the Sequential Circuits Prophet-T8.
Prophet-T8 Technical Manual TM1008A SHIPPING INSIDE USA
$58.00
Prophet-T8 Technical Service Manual TM1008A SHIPPING OUTSIDE USA
$58.00
** Sequential Circuits Prophet-T-8 ** ** Original 1983 Sales Brochure unfolds into a 36 inch long T8 Centerfold
* * * * Original Sequential Circuits 1983 sales brochure introducing the Prophet-T8 * * * * *
Brochure opens up into a full color centerfold of the 76-note Prophet-T8 three feet in length.



Last Update: March 13, 2025