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Understanding LFE, crossover frequency, and bass management - Page 2

post #31 of 37
Quote:
No, this is not correct. Almost every AVR routes the LFE channel to the main channels when specifically configured as having NO SUB connected.

If this is not desired, an AVR can be tricked into dropping the LFE channel by leaving it configured as having a subwoofer connected and simply not connecting one.


I don't think an AVR routes LFE to mains if they are set to large and subwoofer is set to none. It simply does not playback LFE if subwoofer is set to none in the settings.
LFE is a low line level signal; whereas all the speakers use high level inputs. Do you have any source to back up your comments?
post #32 of 37
Quote:
Originally Posted by braveheart123 View Post

I don't think an AVR routes LFE to mains if they are set to large and subwoofer is set to none.
Sure it does.

Quote:
Originally Posted by braveheart123 View Post

Do you have any source to back up your comments?
Yeah. Me. wink.gif

(you can do your own research)
post #33 of 37
Quote:
Originally Posted by braveheart123 View Post

I don't think an AVR routes LFE to mains if they are set to large and subwoofer is set to none. It simply does not playback LFE if subwoofer is set to none in the settings.
LFE is a low line level signal; whereas all the speakers use high level inputs. Do you have any source to back up your comments?

I believe you are wrong too. Lets say you have large full range fronts like klipsch rf-7s but no sub yet, say like a 5.0 system for HT. So based on your theory the LFE is just lost completely. I don't believe so, I believe its routed to your fronts set to large, now whether they can fully reproduce the signal depends on your speakers. But there are some true full range floorstanding speakers such as the rf-7s which extend to 30 hz.
And signal processing is done in the AVR, before amplification. Such as LFE assignment, HP and LP filtering, and crossover frequencies.....so that high level speaker output theory is bunk.
post #34 of 37
LFE does not end at 30Hz and bass radiators of RF-7s will struggle badly reproducing Pulse lab scene or FOTP crash scene at reference volume, but you and sivadselim are very right; I was wrong and stand corrected.

Here is the source; the flow chart explains it all.

http://audaud.com/2004/04/component-reviews-part-4-of-4-2/
post #35 of 37
Hey that's cool, we're all learning here. It's productive discussion, not arguing.
post #36 of 37
smile.gif
post #37 of 37
Quote:
Originally Posted by braveheart123 View Post

Here is the source; the flow chart explains it all.

http://audaud.com/2004/04/component-reviews-part-4-of-4-2/

Well, honestly, Lexicon's bass management scheme is more elaborate and flexible than the bass management that is available in most conventional AVRs. They can usually do what most conventional AVRs can do and then some more. I wouldn't be surprised if they include the ability to actually discard the LFE channel completely when configured as having NO SUB connected. They also might allow you to redirect the LFE to other LARGE speakers in addition to just the front R/L LARGE speakers. As well as the ability to reroute the bass from SMALL channels to not only the subwoofer but also to the R/L (and even center) LARGE speaker channels. Etc..
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