Hello... I feel that the best time to do some critical listening is late at night when everything (hustle/bussel) has been mellowed down. You'd be surprised at how good your rig will sound as to the afternoon when everyone is into something or another. I've always been one to feel that a great dedicated sub will preform much better than the woofers in full range spks any day of the week and twice on Sunday's. I bi-amp my NHT VT-2's in a passive set-up with 225 watts to the highs/mids ad 250 watts to the woofers. Late at night I play 2-ch w/o my sub, and when it's conveinent and I want to get down and dirty, I fire it up with y VT-2's. Tonight I fired up the upper part of my VT-2's (mids/tweets) without the lower bass spks. I usually have my Velodyne xo at 40hz for the real low down (hardly ever there) stuff. This combo didn't do it for me. But once I upped the xo to 80hz, that's when my "NEW" 2-ch system took over. The bass notes from my HGS-18 took over my listening room where-as it didn't have to compete (problems??) with the woofers in my spks for all the space, because it took up all of it. The LF notes were more pronounced, sharper, fuller, and dynamic. I could feel the notes. The sub was able to hit those low notes with such force (even at low volumes) that the woofers in my spks couldn't do. When I went back to the VT-2's w/o the sub playing, it was no-where near the same experience. The strange thing is that I didn't have to make any adjustments with my system. I listen to a lot of singing groups and the vocals in the mids opened up even more than before. Even at low volumes, the music was beautiful. I can't wait until later today, when I can open up this new combo and really hear "What's Going On" with different kinds of music. With me using just the upper half (mids/tweets) and not using the bottom half (woofers) for 2-ch music (using sub), is any of my components in any danger from this set-up? Try it and hear the difference as I did. Any opiions? Thanks!!