My history goes back to a small tube Silvertone amp back in 1968. I then went to a Fender Bassman with small 2x12, Kustom 200 2x15, Traynor yb1 with 8x10 (yea baby) Sunn 200s, Peavey MK IV (w/sunn cab) Alembic F1-X/Line6 Pod into many different power amps. Through it all I've never found anything that responded to my playing like the Bassman/yb1/200s tube amps did, not even the F1-X/Pod. Until now. When I first hooked up the SVP-Pro at home in the quiet of my small studio, I was real disappointed. With the power-amp up full it sounded like I had a bad ground loop. But, the SVP has so much gain that I can cancel most of it out by turn up the pre-amp and turning down the gain on the power-amp. I got it under control and in a live bar setting you can't even hear it. The real difference was apparent when I started playing with the other mates in the band. For the 1st time in a long time my rig responded like it did with tube amps. It's probably some sort of tube compression/distortion thing but it makes me satisfied to fewer notes and with more feeling. The guitar player noticed it first. He said, "I don't have to turn up as loud to hear myself. Your bass doesn't cover my tone." (I was playing louder than usual) The drummer said, " It seems to have more punch ". I said, "It's a keeper, noise and all" I'll get my buddy at the music shop to get some of the noise out of it. Probably a sh!tty tube or something.