"i think it uses pin 1 and 7 on the midi cable for 9vac" i'll need to double-check the manual, but i believe it's pin 6 and 7 that carry the power. what i've done so far is buy a standard 5 pin cable and a 7 pin end. i'll cut and solder as i need, leaving 4 and 5 (on the 7 pin plug) unattached. sound good? -jim