This is my newest rig. My previous included an Ampeg SVT 810. It was ok, but I felt it lacked definition. This rig consists of two Hartke HX410 powered by a Crown UltraTech 1010 (900watts@4ohms),with an ADA MB-1 preamp. This combination sounds absolutely killer and I can get a tone similar to D.D. Verni (Overkill) or Nathan Watts (Stevie Wonder). At least close enough for me. I love it and although these are two of my favorite players aside from Steve Harris I am not trying to copy them. Loud and Defined. Done.