solved the problem guys, with a little help from AVS forum.

so I had my sub set to 'yes' and 'lfe+main' with a crossover at 80 hz.
These settings were applied in the GUI at the following location

manual setup->speaker setup->speaker config
to set the mains to large, and
manual setup->speaker setup->subwoofer set up
to put the sub to 'lfe+main'

It turns out that there is another place in the gui you must make adjustments for stereo playback

in the GUI go to
manual setup->audio set up-> stereo/direct

here it showed subwoofer to 'no'

I changed it to yes and lfe + main, with an 80 hz crossover to test the bass output

Holy crap my sub POUNDS in stereo mode with an 80 hz crossover.
I think setting you mains to 'large' with sub set to 'LFE+main' is different then a 'small' setting with a crossover because the mains AND the sub are playing the low range signals (at least as low as the m80's can possibly play)

if I set it to LFE the sub does not work with stereo sound (because it is only sending the low range signals from 'small' speakers to the sub, and my mains are set to large.)

If I turn it to LFE+main then even speakers set to 'large' (my mains) will send the sub 80hz tones to the sub.

anyway, thanks for all of th input guys!


mdrew, there is an option under both of the setup menus (speaker set up and audio set up), that lets you adjust what 'low range' (80 hz, 60 hz, ect.) signals are sent to the sub when you have LFE+main turned on

anyway, I am now satisfied that my sub is working as it should be, and have since turned it to 'no' for stereo play back. When I feel like listening to some bass heavy rap or techno, I can change it to 'yes' and shake my house apart.

Last edited by terzaghi; 11/28/07 06:22 PM.

-David