Heres a tip for more bass from Mesa Quad Preamp. The trick is middle knob pulled deep. This adds tuns of bass in combination with the Graphic EQ with the 80hz up near top line and the 240 in between half way and top line you should get mega Bass. I use a Mesa/Boogie Road Ready 4x12 with 2 Celestion Vintage 30's and 2 EVM 12L's. The EV's deliver Huge Tight Bass..