The RH450 is virtually perfect with this cab for my needs. I love the way they sound together, and the adjustable frequency points on all 4 bands let you realize adjust the head to match the voicing of the cabinet. I am ordering an rh750 today to get a little more power and the extra Tweetertone control which should help even more. The tone Hammer 500 is going on the block tonight. It was fun but since I have the pedal that I use with other amps I really don't need the head.
