I've had this head for about 9 months, many gigs. It's the bomb. Search is over. The compression circuit is very musical. If you can't find your sound on this thing, then I suggest you take up another instrument. No probs with this thing at all. Perfect "working mans" bass head. I play it thru an Ampeg B115 with a Hartke 210 on top of the B115, then the PF400 on top. YYMV, but I'm very pleased.