Sennheiser ew172 g2: difference between the "a,b,c" channels?

[triggervision]

Also, is there a better unit out there for the money. I play a 4 string drop D if that helps. The X2 doesn't work for me because I want something that will fit inside my rack not on the floor. Thanks!!

[Asa Samuel]

its got if you are using more than one of theese systems so, you could be on chanel A the guitarist could have a seperate box and transmitter on chanel B and rythm on C.

if you and the guitarist were both on A there would be a mix of the signals and sound horroble.