I've been having a blast with this little unit since I purchased it last week ! I have found great sounds sound for each one of my basses, it even revived my interest in an old fretless I have long since retired. I do notice the hiss other users have described,but,only at certain settings, and, definitely not loud enough to be a problem at gigs...which segues nicely into: I'm leaving shortly for a gig. Everything from Allman Bros. to Bill Withers, Staple Singers to Hendrix! I'll be using a passive J- style bass (barts), a Dr.Bass Rx 2x10,and,a Dr.Bass 1x15, both 4 ohm cabs, for a total of 2 ohms. Besides holding down the bottom all night, I'll be featured on one Slap Style solo, and one bridge pickup/octave box solo excursion. I'll have a full report tomorrow!