Last night, I finally hooked up my gear in its dedicated room. It's ugly (cables visible everywhere, old tables and a/v racks for gear, etc.) but functional. No WAF involved, it's MY room. Anyway, I placed the speakers where I want them, did a quick calibration of the speakers with my Radio Shack meter and loaded up my first SACD in multichannel (had been listening to a number of them in two channel while waiting), Alison Krauss and Union Station Live. I considered it the best recorded disc I owned, with natural sounding acoustic instruments, clarity, detail, etc. When I switched over to the 5.1 mix, I noticed an odd kind of reverb, especially noticeable during quiet passages and vocals. Is this owing to the space in which it was recorded (and two channel can't reproduce this effect) or is there possibly something wrong with my setup? Other m/c SACDs and DVD-As that I ran through the system didn't have this reverb. I haven't yet treated the room acoustically, but it's not overly lively. I will say the 5.1 mix and its reverb did make "think" I was in the auditorium (though it sounded like an empty hall, when it should have sounded full). Perhaps that extra reverb is more "realistic"? For what it's worth, my gear is Marantz DV6400--all settings large, sub on, Integra DTR 6.4 receiver--BM/TA active on multichannel inputs, 80hz crossover, all speakers to small, Boston Acoustics VR-M60s front L/R, Boston Acoustics VRC centre, Boston Acoustics VR-M50s surround L/R, Boston Acoustics PV900 subwoofer. Just curious. I've been looking forward to listening to hi-res multichannel in my own setup for a long time (DD and DTS mixes of DVD-As were as M/C as I'd gotten before now) and I guess I should be prepared to experience some sonic characteristics that might seem unfamiliar.