To be honest I have never had one , all I can say IMHO the demo I have seen on you tube doesn't do it justice at all in fact it couldn't have been worse . comparing it to my markbass little Rocker & MarkBass Mo Mark , it has a lot of depth, clarity & punch , It made my TC 250 sound like tiny transistor radio . I really don't under stand why more of these were not sold , I've tried to find fault with it & I just can't I have to cover stuff from Blondie ,Peter Gabriel,PIL, Yes to name a few & it does it all very well . I've had a lot of amps & none of them have been as good as this .