No. You just take a short patch cord and run it from one of the normal inputs channel into the other top boost channel input, while your guitar is plugged into the other TB input (I think). This can also be done with some Marshalls (I've done it on a Blues Breaker).Originally posted by Tanner Vix
bscepter could you explain that jumper trick with a little more detail? Is it an actual external box you use?