I was looking for some slight clarification on the RB series. I'm currently using the 700RB and I have been reading some posts about the GK growl and I'm curious what causes this besides the Boost knob. I mean, I'm kind of an EQ frown kinda guy (high's and lows cut slightly and mids boosted slightly) and I've also been using quite a bit of the Tweeter volume (probably at around 2 o'clock) with the Woofer knob set to 12. Now my current settings also have the boost maxed out with the volume around 10/11 and I'm still not really hearing a ton of growl. Is the boost knob best used in conjunction with the Woofer volume? Should I be turning that up to increase the growl I'm getting? Or am I just looking for a type of growl I'm not going to get just using this amp? Thanks all!