i have an s950 that i love but it is my noisiest piece of equipment and the only one that doesn't have a 3 prong grounded power cord. how do i change the plug? i have already spliced a 3 prong plug-theres white green and black wires. which one is the ground and where do i connect it on the s950? (does it just connect to a metal part on the chassis?). this is electricity so i don't want to do anything wrong and ruin my s950 or myself... please advise me! i have a soldering iron and no real knowledge of electricity (i'm dangerous) btw: the s950 rocks for percussion (punchy) and i love its filter especially when you take it real low !