I'm using the SABDDI as a preamp, and I think I'm going to chuck my rack stuff. There is an amazing range of sounds available from this little box, as well as a really cool (for me, anyway) overdrive. The "natural" compression that it has is killin' as well. Right now, I'm using it with both Bass and Treble just short of 12 o'clock, Presence about 12, Drive about 1 o'clock, and Blend about 2 O'clock. This gives me (with a Precision) good mid-range thump 'n' bump along with decent definition and depth. It's going to take a while to really see what all it can do, but this is definitely a cool little box. I like it straight into the PA and/or power amp (i.e. no bass head).