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Roland ProMars (MRS-2)

Released in 1979

The ProMars MRS-2 Compuphonic synthesizer is a dual-VCO monosynth that is similar in character to the polyphonic Jupiter-4. Both of these synths have a handful of presets, as well as several user preset locations, hence the 'Compuphonic' moniker.

Roland ProMars (MRS-2)
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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.

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Battery, 3.6V NiCad
Battery, 3.6V NiCad
$22.95 (Part #4486)
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Bender assembly, Roland
Bender assembly, Roland
$49.95 (Part #3528)
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Bender lever, Roland
Bender lever, Roland
$19.95 (Part #4023)
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Bender lever, Roland, clear
Bender lever, Roland, clear
$18.95 (Part #5036)
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Bender plate, Roland
Bender plate, Roland
$5.95 (Part #3549)
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Bender rubber stop, Roland
Bender rubber stop, Roland
$3.95 (Part #11968)
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Bridge rectifier, WO-02S
Bridge rectifier, WO-02S
$3.95 (Part #5145)
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IC, 4001 quad NOR gate
IC, 4001 quad NOR gate
$2.95 (Part #3304)
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IC, 4011 quad gate
IC, 4011 quad gate
$2.95 (Part #3391)
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IC, 4016 quad analog switch
IC, 4016 quad analog switch
$2.95 (Part #3302)
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IC, 4024 binary counter
IC, 4024 binary counter
$2.95 (Part #10651)
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IC, 4025 triple 3-input NOR gate
IC, 4025 triple 3-input NOR gate
$2.95 (Part #2715)
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IC, 4049 hex inverter/buffer
IC, 4049 hex inverter/buffer
$2.95 (Part #2382)
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IC, 4051 multiplexer chip
IC, 4051 multiplexer chip
$2.95 (Part #4319)
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IC, 4052 multiplexer switch
IC, 4052 multiplexer switch
$2.95 (Part #7739)
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IC, 4069 hex inverter
IC, 4069 hex inverter
$2.95 (Part #3994)
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IC, 4070 quad 2-input exclusive OR gate
IC, 4070 quad 2-input exclusive OR gate
$2.95 (Part #5172)
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IC, 4558 dual op amp
IC, 4558 dual op amp
$2.95 (Part #3387)
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IC, 723 linear regulator
IC, 723 linear regulator
$4.95 (Part #3428)
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IC, 741 op amp
IC, 741 op amp
$2.95 (Part #3297)
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IC, BA662 Roland VCA chip
IC, BA662 Roland VCA chip
$57.95 (Part #4339)
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IC, IR3109 Roland VCF chip
IC, IR3109 Roland VCF chip
Late version
$52.95 (Part #4243)
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IC, LM311 comparator
IC, LM311 comparator
$2.95 (Part #2560)
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IC, TL082 op amp
IC, TL082 op amp
$2.95 (Part #3423)
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IC, UA726HC NPN monolithic transistor pair
IC, UA726HC NPN monolithic transistor pair
$99.95 (Part #5704)
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Knob, Roland
Knob, Roland
For all except VCO
$9.95 (Part #1381)
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Knob, rotary, Roland
Knob, rotary, Roland
For VCO
$9.95 (Part #3224)
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Phone jack
For Headphones
$11.95 (Part #1385)
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Phone jack, 1/4-inch
All except Headphone
$11.95 (Part #1384)
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Potentiometer, 100KB rotary
Potentiometer, 100KB rotary
For A/B Tune
$17.95 (Part #3494)
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Potentiometer, 100KB rotary with center tap
Potentiometer, 100KB rotary with center tap
For bender
$22.95 (Part #3646)
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Potentiometer, 2MA rotary
Potentiometer, 2MA rotary
For Portamento
$12.95 (Part #1387)
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Potentiometer, 50KB rotary
Potentiometer, 50KB rotary
For Bend Sensitivity
$12.95 (Part #1648)
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Potentiometer, 50KB rotary
Potentiometer, 50KB rotary
For Brilliance, Master Tuning
$19.95 (Part #3613)
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Power switch, pushbutton
Power switch, pushbutton
$16.95 (Part #2227)
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Rotary switch, 3-position
For VCO Range
$19.95 (Part #1705)
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Rotary switch, 4-position
Rotary switch, 4-position
For Waveform
$19.95 (Part #3592)
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Slide potentiometer, 2MC, 30mm
Slide potentiometer, 2MC, 30mm
For Delay Time
$24.95 (Part #1380)
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Slide potentiometer, 50KB with detent, 30mm
Slide potentiometer, 50KB with detent, 30mm
For LFO Bend
$24.95 (Part #1386)
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Slide potentiometer, 50KB, 30mm
Slide potentiometer, 50KB, 30mm
For all except Arp. Rate, Delay Time, LFO Bend
$24.95 (Part #1379)
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Slide switch, 2-position
Slide switch, 2-position
For Sub (On/Off)
$14.95 (Part #2461)
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Slider knob, Roland
Slider knob, Roland
$9.95 (Part #3225)
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Spring, for bender
Spring, for bender
$3.95 (Part #3548)
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Style 35U key, black note
Style 35U key, black note
$14.95 (Part #K35UBL)
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Style 35U key, note A
$16.95 (Part #K35UA)
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Style 35U key, note B
Style 35U key, note B
$16.95 (Part #K35UB)
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Style 35U key, note C
Style 35U key, note C
$16.95 (Part #K35UC)
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Style 35U key, note D
Style 35U key, note D
$16.95 (Part #K35UD)
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Style 35U key, note E
Style 35U key, note E
$16.95 (Part #K35UE)
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Style 35U key, note F
Style 35U key, note F
$16.95 (Part #K35UF)
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Style 35U key, note G
$16.95 (Part #K35UG)
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Style 35U key, top C or top F note
For top F note
$24.95 (Part #K35UC8)
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Switch cap, black
Switch cap, black
For Power
$12.95 (Part #2228)
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Switch cap, blue
Switch cap, blue
$9.95 (Part #1373)
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Switch cap, green
Switch cap, green
$9.95 (Part #1371)
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Switch cap, red
Switch cap, red
$9.95 (Part #1370)
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Switch cap, white
Switch cap, white
$9.95 (Part #1369)
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Switch cap, yellow
Switch cap, yellow
$9.95 (Part #1372)
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Switch, aluminum lever, 2-position
$14.95 (Part #1395)
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Switch, aluminum lever, 3-position
Switch, aluminum lever, 3-position
For A/B Tune, Portamento
$16.95 (Part #4484)
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Transistor, 2SA1015
Transistor, 2SA1015
$1.95 (Part #3294)
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Transistor, 2SC1815
Transistor, 2SC1815
$2.95 (Part #1943)
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Transistor, 2SD880
Transistor, 2SD880
$2.95 (Part #2955)
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Voltage regulator, 7805
Voltage regulator, 7805
$2.95 (Part #2256)
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Voltage regulator, 7815
Voltage regulator, 7815
$3.95 (Part #2321)
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