i yust recently installed a deqx pdc2.6 in place of my marchand outboard x-over. i have one word to say about it:
WOW. it really opens up the soundstaging. i cannot hear anything bad that it does - everything is there - detail, warmth, timbre, dynamics... nothing at all harsh, etched, etc. - things one might be worried about w/digital dsp.
i have only one issue with it - due to its nature of eq'ing your speakers, & then your room, it's more of a hassle to simply swap out gear. i have a few different speakers, & i like to change 'em sometimes, but this means i am gonna have to eq them individually, & then eq the room w/them in the system. but, now that i have figured out how to use the deqx, it shouldn't take that much time. but, i still need to do it, for four-five other speakers i wanna try in my rig. and, you also have a similar issue with swapping out amps, but not as big a deal - you just have to make sure the sensitivity of different amps is compensated for if you are bi-amping or tri-amping.
i was hoping to have some folks from the mid-atlantic circle over for a listen, but i think i need to eq s'more speakers first; i have only had the deqx up & running on one pair of speakers for ~2 weeks now. but it
is awesome! aa even with this vintage mitsubishi da-a10 solid state amp i have been testing out, in lieu of my usual mesa baron.

doug s.