Some amp "bass knobs" simply control the Bass Boost, not the gain. Personally, I'll use the knob if it is a remote gain knob. If it is a bass boost knob, I scrap it.thats what i figured bc im just smart bout the gains. and then i use the knob to turn down and up....//content.invisioncic.com/y282845/emoticons/confused.gif.e820e0216602db4765798ac39d28caa9.gif