My apologies, in advance, for many/most of you who already know this stuff, and could perhaps teach me a few things.
After reading Ed's comments, it appears that the Perception box itself may not be the problem in some instances. I'll be the first to admit that the bass level and/or low bass response can vary widely by recording. My collection of 78's, and transfers of those to LP's and CD's are often lacking in low bass, which is to be expected. If track(s) are missing bass altogether or are full range with little or no information on the .1 channel, it is probable that you'll get little or no bass without changing your settings. Also, realize that a non-remastered '60's LP or CD may have a great deal of mid-bass, but little or no low bass or subsonics. Subsonics are, of course, frequencies that can be felt, though not heard.
Many people fail to realize that there are many types of subwoofers. When subs were introduced in the late '70's, everyone had "full range speakers." Subwoofers were introduced to provide audiophiles with low bass and subsonics to augment the performance of full range speakers. Later, sub/sat systems offered a much smaller footprint via 5 speakers with midranges and tweeters only, and a bass module. The third type is Bose Acoustimass, with 5 speakers that are essentially tweeters, handling the upper midrange and high frequencies. The bass module offers only upper bass and lower midrange. Except for Bose, there are still wide variations in frequency response and/or range of crossover frequencies available for different subwoofers.
For those who are having bass issues on these or any other recordings, I respectfully suggest first checking the frequency range of both your sub and your 5 (or 4, 6, or 7) speakers. If they're not a good match, you will have a "hole" in your frequency response, i.e. a gap between your mains and sub(s.) If they are compatible, you may want to "dial in" the level and crossover frequency of your sub(s) again.
Bass management on your receiver or preamp is another crucial aspect. If that is set to "large," you could potentially damage your satellite speakers by overwhelming them with bass they weren't designed to handle. More likely, if you have full range speakers and you set the bass management to "small," you'll get minimal bass, especially with no sub. Also, is the sub function on your receiver or preamp turned on, and what kind of sub is it set for? For example, my B&K preamp has several sub settings, including THX Ultra, which is proper for my REL sub.
Careful attention to settings and "dialing in" the subs can make all the difference in the world. "Hey, I just want to listen to music, I don't want to be a recording engineer!"
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