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Ensoniq
The Ensoniq Corporation was founded in 1982 and was best known throughout the mid eighties and nineties for its samplers and synthesizers.
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6.35mm (1/4") PCB female jack Jalco style

 Ensoniq ESQ-1, ESQ-M, Korg 01/W and M1 family, Sequential Circuits Drumtraks

BR-2/3A 3V Lithium battery

Used in Ensoniq ESQ-1, SQ80, SD1, VFX-SD, MR61, MR76, MR-RACK and probably many others.
Curtis Electromusic Specialties

CEM3379 - Voltage Controlled Signal Processor

Ensoniq ESQ1, SQ-80, Sequential Circuits Prophet 2000, Prophet VS, Doepfer A107, A122, A106-6 and A109

Ensoniq ESQ-1 Display

This is obviously new old stock. I still have several units in mint condition, never used, in its original OEM packages. In fact, I can provide you all the parts for the ESQ-1 display board.

Ensoniq ESQ-1 OS 3.5

U17 and U18 OS EPROMs
I can provide the original OS or the patched OS that can use the extra "hidden waves".

Ensoniq ESQ-1 potentiometers

Ensoniq ESQ-m OS 1.2

Ensoniq VFX lithium battery

Ensoniq VFX OS 2.30

Motorola MC68B09EP

Used in Ensoniq Mirage, SDP-1, ESQ-1, ESQm, SQ80, Sequential Circuits Prophet 2000
Solid State Micro Technology for Music

SSM2300 - 8-Channel Multiplexed Sample&Hold

This chip was initially created by SSM (Solid State Micro Technology for Music) but later in 1988, they sold the rights to PMI (Precision Monolithics, Inc). PMI also sold the rights in 1991 to Analog Devices. Analog Devices does not produce it anymore but you will find them with those different brands and they all are the same product.

Used in Ensoniq ESQ-1, SQ-80, Akai VX600, E-MU Emax, Simmons MTX9

TL4810B - Vacuum Fluorescent Display Driver

Improved direct replacement for TL4810A

TL5812 - Vacuum Fluorescent Display Driver

R1121-11 Rockwell Display/keypad processor

This chip is problematic. Usual symptoms are keypad keys not working and/or display shows garbage.

Used in: Ensoniq ESQ-1, SQ80

5503000101

Ensoniq ESQ-1

R1120-12

Ensoniq ESQ-1