I just got this amp, but not sure what's up with the input section. On my old SWR amp, the manual basically says to turn the input up until it barely clips (light blinks) on your loudest notes. It also says clipping won't hurt the preamp. Should I operate the GK amp in the same way? When I crank the input gain on the GK, the clip light never comes on, even though I can clearly hear it clipping like crazy. Is it just a bad light then? Will clipping harm it, or just sound bad?