I'm curious about something. In perusing the various a/v forums, I frequently see debates about large vs. small settings on a/v receivers/processors, variable crossover frequencies on those processors, difficulty in integrating subwoofers in a/v systems etc. I find myself wondering why people spend so much time fighting with their a/v processors, trying so hard to get things integrated properly. Why don't more people buy speakers that work with the 80Hz 12dB/oct high pass, 24dB/oct low pass crossovers built into most a/v gear. A sealed speaker with an F3 of 80Hz would seem to work perfectly with most receivers. Do people not buy them because there aren't many available? Or is there just a general preference for vented speakers that play lower? I'm genuinely curious about this and would be very interested in hearing your comments on the matter.