Just got my DB750 and have only experimented with my El Whappo so far, have an outsider this coming weekend. It sounds very very very good in my practice room. As always... the test for me is on the job. More to come. BTW, I've racked this amp in a SKB19-4U which is identical to my Demeter/CA9 rig case. It's a bit bulky but I'm used to it and find the protection and ease of use very good. The only thing about the DB750 is it's a bit front heavy so the lift is unbalanced. That has nothing to do with the case just an observation, (my 400+ was the same way) Anyhoo, the amp of course runs a little hotter compared to being un-racked vs. ina' nice rack... I usually carry one or two handy-dandy Auralex Gramma pads for various uses one being under the amp rig atop the cab for extra dampining which I think is always a good thing. I just wonder if anyone else regularly practices this or do feel the amp being racked and sort of suspended is enough. I'm short ... and the El Whappo on casters plus the Gramma make it a pretty high lift for my old body...not a big deal just curious. (Also, I think rack bags are great for lighter gear but the DB750 seems a bit heavy for a bag and rack tuner). My new rig/rack is 60# including all the cables. I rarely take the EW off the casters because the bottom end is so huge, there is never a need so far. In fact I usually cut a little bass eq on inside gigs.... but on outside... oh Momma. Also, the DB750 is a very sexy looking amp, the only thing I would change is moving the on/off switch to the front and moving the XLR to the back out of the way, or at least just put the xlr in the back... PS, I only accomplished shaving off about 12lbs. in comparison to my Demeter/CA9 rig. This is not much and not the only reason I bought the DB750. It definatley has a different vibe than the Dem/Crest, and that's I wanted, both are fabulous.