Hi Guys / Girls, I need some advice... right now i have a XS400H - Bass Head - 400w (Yorkville) and i'm running it into a 8ohm fender 1x15 inch cabinet... i am not getting enough sound out of this setup!!! So i need some suggestions... two amps i've really been interested in is the 1. Ampeg SVT 4 PRO ( but i don't know what cabinet) 2. and the Traynor YBA 200 Tube Head w/ 2x10 . 1x15 cab... i play bass with my fingers, a fender jazz with active pickups and i need volume and durability... can anyone help ?!