I have to say that after years of Fender making fairly mediocre bass amps in pretty much every size, that they hit the target dead on with this head. I have played an SVT (old style '72/73 or so) and/or my SWR SM400S for the last 10 years with a variety of different cabs and I used the Bassman 300 (used to be the Sunn 300T) last weekend at a gig with my hard rock cover band and WOW!! The tone I got was amazing, and I had guitarists (yes, those guys, I didn't think they knew what I did either) coming up to me and remarking on my bass tone. The EQ and compression circuits in conjunction with the overdrive channel gave me everything I wanted tone-wise, and the sheer volume of the rig was frightening. I used it with a Dingwall 5 and a Spector NS2 4 string and an SWR Goliath Sr 6x10" and it KILLED. I am a believer, completely, and a pal who was there at the show who plays a Stingray 5 string/SVT rig is giving his SVT some second looks. I'd like to hear from anyone else who has used or is using one of these at the moment and get more opinions on this amp. I already bought a Bassman 300 of my own, so......anyone out there want to buy an SM400S ?