How Important Is the LFE Subwoofer to Home Theater?
"1.- When you turn LFE on something else happens in the decoder circuitry that causes the midrange and highs to loose air and to sound slightly squashed, gray and dry compared to what you hear when LFE is off.
2.- The problem arises from the fact that LFE on/off is not just turning LFE on or off. The bass management circuit takes a little bass from the main speakers and off loads it to the LFE sub whenever LFE is on -- even if you have selected "large" main speakers.
3.- I find the effect bad enough that I generally prefer to drive the LFE subwoofer from the analog outputs of the DVD player rather than from the LFE output of the receiver or processor.
4.- You may not have the sub setup correctly or you may not think a sub is really needed.
5.- The information here should arm you with the basics to understand and win the Dolby Digital bass wars"