Where s the bass?

Yes - the speakers are in good positions away from side and back walls. I hate to put it closer to the side walls to get more base effect. I think the overall open and transparent sound somehow overshadows the base. The bass is there as the Thiel 7.2 can put out a lot of bass and the X600 amps got plenty of power to drive the Thiel. I just wish I can get a bass boost.

While my $500 Sony is far from Class A - I know it can put out great bass. The bass was there with the BAT VK-60 tube amp, which is one-tenth the power of the Pass X600. I'm not saying the bass is gone with the Pass - I just felt that the bass was de-emphasis somehow with more energy at the midrange and up with the Pass. Maybe it's a good thing and I just need to get used to it. I wonder what you would do to boost the bottom end OR roll-off the high end slightly. Perhaps I should leave it alone.

Liguy - I don't play loud and 60 watts is enough power for typical music listening level - and that's what I used to compare BAT vs PASS; not to play as loud as each amps can play, but play them at comfortable level.

Briweve - perhaps you're right on your post that amplifiers from Krell and other brands (BAT in my experience) are tuned to deliver more energy to improve the bottom end. We will never find out the true. It's a fact that certain brands sound warmer than other. It could be that Pass is more neutral than Krell and BAT. I hate to think that Pass lacks the power at the bottom end.

Sean - I don't have any room acoustics treatment - just typical dry-walls and tile floor. Do I need sound absorber? What kind? I guess there are different kinds to either absorb low or high frequency. I don't want my room to look like an acoustics chamber.