Alesis QuadraSynth

Released in 1993

The QuadraSynth is a 76-note wavetable synth with 64-voice polyphony. The QuadraSynth Plus (1995) had the same sound engine, with more waves and more programs.

QuadraSynths were produced with two different key styles, which simply have different-sized weights - they are otherwise interchangeable. The K03W keys have a weight that is about an inch long, the K03H weights are half that size.

Synth
All photos are copyrighted by Syntaur, and may not be used without permission.

We stock both NEW and USED parts; all used electronic parts are tested and guaranteed working.

This listing reflects our current inventory and is updated in real time. If a part is shown as Out of Stock, we typically don't know when or if we might have it again - but click on the part for more info, and then you will be able to sign up for an alert when we do have it available again. By including out of stock parts in our listings, we hope to offer customers a more complete and useful resource.

We cannot diagnose repair issues by phone or email. For technical questions, we suggest posting on our Forums, where our techs - as well as other users - can offer help.

AC power inlet assembly, Alesis
AC power inlet assembly, Alesis
$7.95 (Part #5551)
Click for details
AC power socket
AC power socket
$6.95 (Part #4135)
Click for details
Battery, 3V lithium
Battery, 3V lithium
$7.95 (Part #4425)
Click for details
Button assembly, 2 larger buttons, Alesis
Button assembly, 2 larger buttons, Alesis
$8.95 (Part #5553)
Click for details
Button assembly, 4 larger buttons, Alesis
Button assembly, 4 larger buttons, Alesis
$12.95 (Part #5554)
Click for details
Button assembly, 5 larger buttons, Alesis
Button assembly, 5 larger buttons, Alesis
$13.95 (Part #5555)
Click for details
Button assembly, smaller buttons, Alesis
Button assembly, smaller buttons, Alesis
$7.95 (Part #5552)
Click for details
Button board, Alesis
Button board, Alesis
$34.95 (Part #5539)
Click for details
Contact strip, 1-note
Contact strip, 1-note
$1.95 (Part #4883)
Click for details
Contact strip, 12-note
Contact strip, 12-note
$10.95 (Part #4156)
Click for details
Contact strip, 3-note
Contact strip, 3-note
$3.95 (Part #5296)
Click for details
Contact strip, 4-note
Contact strip, 4-note
$5.95 (Part #4157)
Click for details
Contact strip, 8-note
Contact strip, 8-note
$7.95 (Part #4159)
Click for details
Display assembly, Alesis
Display assembly, Alesis
$69.95 (Part #5543)
Click for details
Display bezel, Alesis
Display bezel, Alesis
$8.95 (Part #5550)
Click for details
IC, 6N138 optocoupler
IC, 6N138 optocoupler
$2.95 (Part #2892)
Click for details
Key bushing, lower
Key bushing, lower
$0.25 (Part #4175)
Click for details
Key bushing, upper
Key bushing, upper
$0.25 (Part #4174)
Click for details
Key contact board, 32-note
Key contact board, 32-note
$33.95 (Part #4206)
Click for details
Key contact board, 44-note (High)
Key contact board, 44-note (High)
$44.95 (Part #4205)
Click for details
Key return spring
Key return spring
$0.95 (Part #KEYSP3)
Click for details
Knob, Alesis
Knob, Alesis
$7.95 (Part #5544)
Click for details
Knob, Alesis
Knob, Alesis
$6.95 (Part #5545)
Click for details
Main board, Alesis
Main board, Alesis
$72.95 (Part #5527)
Click for details
MIDI jack, female
MIDI jack, female
$2.95 (Part #3059)
Click for details
Mod wheel assembly, Alesis
Mod wheel assembly, Alesis
$19.95 (Part #5547)
Click for details
Nut, black plastic, for phone jack
Nut, black plastic, for phone jack
$0.95 (Part #1444)
Click for details
Panel board, Alesis
Panel board, Alesis
$34.95 (Part #5537)
Click for details
PCMCIA card slot surround, Alesis
PCMCIA card slot surround, Alesis
$7.95 (Part #6384)
Click for details
Phone jack, 1/4-inch, 4-pin PCB mount
Phone jack, 1/4-inch, 4-pin PCB mount
For all jacks except Phones
$6.95 (Part #2805)
Click for details
Phone jack, 1/4-inch, 6-pin PCB mount
Phone jack, 1/4-inch, 6-pin PCB mount
For Phones
$6.95 (Part #4889)
Click for details
Pitch bend wheel assembly, Alesis
Pitch bend wheel assembly, Alesis
$19.95 (Part #5548)
Click for details
Pitch bend wheel spring, Alesis
Pitch bend wheel spring, Alesis
$2.95 (Part #5549)
Click for details
Pitch bend/mod wheel, Alesis
Pitch bend/mod wheel, Alesis
$8.95 (Part #5546)
Click for details
Potentiometer assembly, Alesis
Potentiometer assembly, Alesis
$19.95 (Part #5541)
Click for details
Potentiometer, 10KB rotary
Potentiometer, 10KB rotary
For Volume, pots 1-4
$7.95 (Part #3299)
Click for details
Power switch, rocker type
Power switch, rocker type
$5.95 (Part #3249)
Click for details
Pushbutton tact switches, pkg of 10
Pushbutton tact switches, pkg of 10
$11.95 (Part #4572X)
Click for details
Ribbon cable, 10-inch, 14-pin
Ribbon cable, 10-inch, 14-pin
For main board to display
$6.95 (Part #4428)
Click for details
Ribbon cable, 21-inch, 16-pin
Ribbon cable, 21-inch, 16-pin
Main board to keyboard
$10.95 (Part #9489)
Click for details
Ribbon cable, 21-inch, 20-pin
Ribbon cable, 21-inch, 20-pin
Main board to keyboard
$14.95 (Part #6418)
Click for details
ROM expansion board, Alesis
ROM expansion board, Alesis
For Piano Plus
$51.95 (Part #5540)
Click for details
Rubber foot with lock pin
Rubber foot with lock pin
$2.95 (Part #4439)
Click for details
Style 03H key, note A
$10.95 (Part #K03HA)
Click for details
Style 03H key, note B
Style 03H key, note B
$10.95 (Part #K03HB)
Click for details
Style 03H key, note C
Style 03H key, note C
$10.95 (Part #K03HC)
Click for details
Style 03H key, note D
Style 03H key, note D
$10.95 (Part #K03HD)
Click for details
Style 03H key, note E
$10.95 (Part #K03HE)
Click for details
Style 03H key, note F
$10.95 (Part #K03HF)
Click for details
Style 03H key, note G
Style 03H key, note G
$10.95 (Part #K03HG)
Click for details
Style 03H key, top C or bottom E note
$16.95 (Part #K03HC8)
Click for details
Style 03H key, top G note
$16.95 (Part #K03HGT)
Click for details
Style 03W key, black note
$9.95 (Part #K03WBL)
Click for details
Style 03W key, note A
Style 03W key, note A
$10.95 (Part #K03WA)
Click for details
Style 03W key, note B
$10.95 (Part #K03WB)
Click for details
Style 03W key, note C
$10.95 (Part #K03WC)
Click for details
Style 03W key, note D
$10.95 (Part #K03WD)
Click for details
Style 03W key, note E
$10.95 (Part #K03WE)
Click for details
Style 03W key, note F
$10.95 (Part #K03WF)
Click for details
Style 03W key, note G
$10.95 (Part #K03WG)
Click for details
Style 03W key, top C note
(For bottom E note)
$15.95 (Part #K03WC8)
Click for details
Style 03W key, top G note
$15.95 (Part #K03WGT)
Click for details
Transformer board, Alesis
Transformer board, Alesis
$41.95 (Part #5542)
Click for details
Voltage regulator, 7805
Voltage regulator, 7805
$2.95 (Part #2256)
Click for details
Voltage regulator, 7905
Voltage regulator, 7905
$2.95 (Part #2255)
Click for details