Has new 2 line OLED display and Vecoven flash ROM upgrade with OS 3.24.

Has had key contacts serviced and comes with custom flight case.

Though it has a flightcase I'd rather not ship as it's heavy.

Pick up form London W2.

The Vecoven Flash module is a hardware upgrade for the Roland JX-10 and MKS-70 synthesizers that replaces the original assigner EPROM. It provides 32 banks of non-volatile memory (equivalent to 32 M-64C cartridges or one M-1024C) and includes the Super JX firmware, which adds features like an arpeggiator and enhanced MIDI implementation.

Key specifications and features include:

Plug-and-Play Installation: The module simply plugs into the existing EPROM socket, requiring no soldering or wiring.

Firmware Updates: It features a built-in bootloader that allows for firmware upgrades via MIDI System Exclusive (SysEx) messages.

Compatibility: It works with the Roland JX-10 and MKS-70, and is compatible with the GU280 VFD display upgrade and the Vecoven PWM (Pulse Width Modulation) kit.

Firmware Versions: Common firmware versions include 3.x and 4.x (e.g., 3.22, 4.18), which can be downloaded from the Vecoven website.

Factory Reset: Users may need to perform a factory reset sequence to clear configuration memory if settings become corrupted after installation.

The module is designed to overcome the limitations of the original archaic CPU by using programmable logic to manage memory timing, ensuring stable operation with modern fast memory devices.

Has a new installation of Guy Wilkinson's Super-JX OLED Module 2-Line Display: When used with the Vecoven firmware, the module presents enhanced information in a 40x2 character format, allowing for simultaneous display of Upper and Lower tone parameters and improved menu navigation.

Released in 1985 the JX-10 (Super JX) combines two individual JX-8P's for an outstandingly warm, rich and analog sound which is still used in many modern studios all over the world. This synth was the first Roland Synth to be fitted with a quality 76 note keyboard with velocity and aftertouch. Two DCO's per voice, two ADSR envelope generators per voice, and a resonant lowpass & non-resonant highpass filters are only the beginning. It has a 12 voice polyphony for a total of 24 oscillators and it is by far one of the most programmable synths of its time! However, as on the JX-8P, knobs and sliders have been replaced by low-profile buttons and a nice LCD display. Although this may look sleek and elegant, it makes editing a chore. Assign parameters to the alpha dial for tweaking, one at a time, or get the optional PG-800 Programmer to provide traditional, hands-on, dedicated sliders for editing the JX-10's parameters.

The JX10 has a Chorus effect and a chase-play Delay function. The chase-play function allows programmable delayed repeats of voices by alternating patches of the upper and lower modules. The simple chorus effect is either off, slow or fast. It has two programmable sliders (if you don't use the PG-800) for some real-time control which can be recorded along with other effects and keyboard modes into one of the 64 Program Patches. This is in addition to its standard 50 preset and 50 user patch memory. A simple sketch-pad 1-track real-time sequencer is also on-board. It stores sequence data directly to an M16C card, or an M64C card for Patch/Tone OR sequence data. The M16C has a capacity of 400 notes, the M64C 1440, according to the manual.

The JX-10 also comes in a rack-mount version known as the MKS-70. It's worth noting that the JX-10 can not be edited via SysEx, however the MKS-70 can which is one reason many have chosen the rack version over the keyboard. The JX-10 can make bulk dumps of its sounds over sysex, but only with (discontinued) Roland M64C RAM cartridges. The JX-10 has been used by Jane Child, Pink Floyd, Duran Duran, Angelo Badalamenti, Yellow Jackets and The Cure.