Where s the bass?

Sean's post is correct. Walk around your room with the music playing and see if the bass level changes in volume. You or your speakers may be sitting in a bass suck-out location. Consider having your room analyzed to reccomend the best location for you and your speakers. With good equipment its usually the room interface that determines what you hear.

Try putting your listening chair against the back wall. This will elevate the bass level, all other things being equal.

I also recommend you try a REL subwoofer. They are designed to fill in the bottom, without affecting the sound made by your main speakers.

Try the Mcintosh bass eq - it is only 75-99 from Audioclassics so if you do not like it than it is not a bad resale - it will do the job for you - you decide if it degrades or not. So will the Legacy Steradian used with the Whisper - it has balanced ins and outs - handles a room bass problem. An electronic crossover will also do the job - like the Bryston 10B. Good luck - if you get one just do not tell any audiophile if you know what I mean - a lot have bought things like this when I was in the business but did not want anyone to know.

Tai, something is wrong here. You claim to have gotten great bass driving Thiel 7.2's with a 60 watt BAT tube amp whilw getting little bass with Pass X600's? I think not! How did you drive the Thiels, which have only 86db sensitivity with the 60 watt tube amp? Something is not kosher here.