Hey. I'm currently running an EBS Fafner 1 on my two LDS custom cabs which each contain 15, 10, 6.5 and need to find a thunderous gut wrenching head! The EBS is a great sounding head... but maybe for jazz and that kind of thing. Not for metal. Someone told me that the GK 2001 RB has that ability. I also tried a 4 pro and a 6 pro. The 6 was definitely better, but not gut wrenching enough. I can't stand the Class D toy heads out there. Have had several over the past 7 years and NONE had cut it for me. Any thoughts or ideas from Metal players?