ARP 2600 SYNTHESIZER Modded

via this auction
"One of the finest features of this particular unit (just added), is a STRICTLY INTERNAL, and subtle high quality modification - a cv/gate booster. This has to do with the fact that ARP envelop generators need a heavy gate (12 to 15 volts) plus a simultaneous trigger to fire the full response of the ADSR; most CV/gate devices (such as most synthesizers and numerous other machines) have a lower voltage range, and no trigger signal, therefore are useless to drive the ARP. This mod allows the unit to be used normally with the ARP keyboard, AND/OR to mate with another synth (like a Pro-One, etc) or CV/gate type sequencer. Likely any other (keyboardless) 2600 you will find will require you to hunt down and buy the ARP keyboard exclusively in order to properly work the unit. Due to this modification the combinations are limitless, making this is all that much more fascinating a tool. Please note that this is a purely internal improvement, does not show or make any change to the cosmetics/physicality or performance of the ARP in any way, and may be removed quite easily if desired."