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Roland Jupiter-4 JP-4 JP4 Compuphonic Synthesizer Keybaord w/ Mods #39335

Availability: In stock




BRAND: Roland

MODEL: Jupiter-4

FUNCTION: Keyboard Synthesizer

PRODUCT DESCRIPTION: This listing is for a vintage Roland JP-4 Jupiter-4 Compuphonic Synthesizer Keyboard. 


  • Serial #952935

ACCESSORIES INCLUDED: This item comes as seen in photos, and does not include any accessories.

PHYSICAL CONDITION: Very Good - There are some spots of oxidation and scratches and blemishes, dulled finish throughout which are normal for a synth of this age.  All controls, all keys, and all toggle switches are in great shape. Only one slider cap is missing on the cut/freq slider in the VCF section. The front-panel push-button switches are also in perfect shape. A mod has been installed located at the top left corner on the top-panel and consisting of 8 toggle switches, each with an adjacent 1/4" jack. The wood side panels have a few dings but are still in very nice condition. The overall condition is very good.

WORKING CONDITION: Very Good - All keys are in perfect working order. All sliders and control knobs are working great, so are all push-button switches. Sounds very nice all around. The mod I/O and toggle section is a bit of a mystery. Toggle switches seem to have some sort of syncing effect or adding octave voices, they all act a little bit differently. The 1/4" do not seem to be CV/Gate inputs (as those are present on the rear-panel) but some of them do output signal when certain combinations of controls are set a certain way. They do all seem to be working though, and the fun of finding tones on this beauty is endless! The overall working condition is very good.


UNPACKAGED DIMENSIONS: 37.5" x 16.5" x 7"

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