I have an svt-II now.. How does the bass terror compair in tone?
I just got it and haven't had a chance to gig on it yet. I'm recording this weekend (mostly DI) and back to gigging next weekend, so it'll be awhile before I have a more informed opinion. But I spent some time with it last night and today through my Ampeg 610 and I can tell you I really like it. The SVT-II does not have pre/post gain controls so you can only get the grit by cranking it up (loud). Having the pre-gain on the Terror is great. It's a different kind of distortion - a little rougher. Not buzzy like a fuzz box, but not as smooth as the SVT cranked. I like it though, and you can certainly dial in how much you want. The sound is very fat - plenty of low end with the 610 - I found myself rolling off the lows. My SVT had smoother highs I think. Even if I cranked the highs it never got harsh or spikey. Not that the Terror is harsh, but... it's a tube thing. The Terror is not quite as adjustable as the SVT-II, but that's fine; I never used the Ultra Hi, Ultra Low or the Graphic EQ on the SVT anyway. Ampeg's choice in mid freq. is cool, but I basically found the one I wanted and then left it there.
While I definitely get the thick, woolly blues/rock vibe - which is what I want - there is something quicker/tighter than the SVT. My initial feeling is that I really like it, but only gigging will tell. It's a "feel" thing. Tubes can have a soft, lush feel to them - which can create a great bedding for the rest of the band to ride on, or they can feel squishy, depending what you want. This amp feels quicker and has a punch that I was really diggin' today.
I do have a word of caution. I bought this used and it arrived damaged in shipping. On the top of the main chassis, behind where the tubes are, there is a PC board with several relatively heavy components on it. That board is supported by 5 standoffs screwed into the top of the chassis. I suspect this amp was dropped, upside down, in shipping and the weight of this PC board snapped off all 5 screws. They are very small screws and could easily be snapped off by over-tightening them; I feel it is a poor design. I repaired it myself (very tedious), but now I'm nervous about it. It feels easy to drop. And it's in a gig bag, not a road case. That may have to change. I'll post again in a few days with pictures showing the standoffs I'm describing here.
Every choice we make involves a tradeoff of some sort. At this point, the pros outweigh the cons for me. I'm sure I'll miss the SVT, but my back is already thanking me

and my ears are still very happy!