anyone know of a good signal splitter? i learned an old trick to beef up some bass lines and i need a CLEAN guitar amp to fatten up the frequency in some sections. I will most like be using a Marshall tube 10" combo behind my 8x10 or i might make an isolation box. This is only for CLEAN lines, i'm not intorested in any distortion. I also have a Fender Twin available. Do i need anything to reduce the power going to the Combo?? Any Splitter i should use? help, yo.....