i cant even believe how good this thing sounds! i have a sadowsky uv70, an ashdown abm500 and a genz benz 6x10. i thought i had a great sound. im the kind of player who likes to get a great tone and go with it. i dont change alot. i pulled the sansamp out of the box and ran it like a pedal through the input of my ashdown. i set the sansamp to the svt setting in the manual and pulled my tone control so the sadowsky is passive. turned the eq and grind knob off on my ashdown and set the input level. i turn up the volume knob on the amp and my jaw dropped. i have been looking for this sound for 20 years. it sounds just like an old ampeg svt classic. i even would unplug it and try to get the sound with the sadowsky preamp and the ashdown head. i could come close but it just wasnt as good. i sat down and plugged the sansamp back in and turn the sadowsky preamp off and gave it a little grind from the ashdown and a little ashdown eq and , im just shocked! like i said, its the sound that ive been looking for for years. ive heard alot of good and bad about the sansamp but never thought about buying one. i just got it because a couple gigs i have are small and i couldnt fit an amp so i wanted a di. i had no idea how good it would be as a preamp. ive spent thousands of dollars the last couple years on amps and basses and i would have never guessed id find what i was looking for in the sansamp. i think its the presence knob that i like so much. also the tub sound isd better than my ashdown tube preamp. i might just sell the ashdown and buy a power amp.?! i couldnt believe how hot a signal im getting going into the amp and the ashdown needle is barely moving. the band showed up after i was messing with it for about an hour. we played a couple tunes and they were all shocked. the thought it was my new sadowsky and i showed them i had it passive. i just cant believe it.