Opinions Needed: Active or passive pre

I too have the Adcom 750 and agree on the "fullness" found in the 'active' mode. Personally I wonder if this is a product of the LENGTH of the connecting cables along with the type of cable used. Also... the passive mode is great at high volume control levels... the thin sound disappears and suddenly my system has tremendous detail and explosive dynamics. BUT: at lower (ie: sane levels in my apartment) the passive mode becomes thin, and dynamics suffer. I would hazard to guess this has something to do with the "current generating ability" of the source!

Yes of course: front ends aren't typically designed to drive 2 pair of interconnects & the 'device' in between (typically just the attenuator in a passive). Elizabeth certainy you've read the threads regarding driving a SS amp with a tube pre. I tried this a couple of times; once with a VTL & then with a Golden Tube. The GT was miraculous, but I didn't buy it since they're out of business & there would be no product support. Per John, you need the gain of a preamp to get fullness & slam-factors lacking in a passive.

try a melos preamp - either the sha-gold/maestro, or the ma-333/music director - *very* transparent & detailed, *unbelievable* drive & dynamics. doug

I experience the EXACT same thing related to volume control. Also the interconnects are a factor. When I use my red dawn interconnects, the passive preamp has a little more juice than when I use my much lower end esoterica audio interconnect. Also, I recently bought an audio research ph-3 phono preamp. This has a tubed output stage. When I use it to drive my AR tube amplifier, I much prefer the passive mode. There is an unworldly clarity that comes in. I believe this is due to the all-tube amplification stage. I wonder what my cd would sound like with a tube cd player ?

I have a Sony 777. What kind of improvement do you get with the Bel Canto DAC?