basically, you have your normal 9v clip, with the black and red cables going to their individual spots respectively, all you need to do, is cut the side next to the pot, and then solder a new clip in the chain and get two new 9vs and shove em in!
its the easiest mod ever, basically it will go like this: ------{9v}-------{pot}
and what YOU want to do is do this: -----{9v}-----{9v}-----{pot}
so your cutting the original wire in between the first 9v and the volume pot, and just adding another battery clip in between, make sure you insulate them also!!
hope this has helped, it seems an unorthodox way to explain it but yeah hope it helps haha...
what the 18v mod does is, brings more bass out in your tone, cleans the cleans up, makes them a bit darker, and puts a bit more headroom into your tone, ive got it in with my 707 at the moment, and i really like it!
best thing about it, is its easily reversible, so if you dont enjoy it, you can take it out and solder back the original chain!
hope this helped mate
