Right, the Sub is relying on the 1050 providing the Low Frequency Effects signal from the Dolby Digital 5.1 bass management. (Presumably since you're bypassing the low pass filter, you could introduce distortion in the sub by sending signals above 150 Hz through the LFE input).



Almost: the SubOut input sends the signal (assumed to be a full range output 20Hz - 20kHz) to the sub's fixed 150Hz low pass filter (fourth order at -24dB/octave). If the input to the SubOut input is already filtered by the 1050 at 150Hz (second order at -12dB/octave), then the output of the low pass filter in the sub has a much sharper cutoff (-36dB/octave relative to the original signal). Result: probably negligible difference in midrange compared to using LFE input, issue of why use the filter if you don't need it.

It gets more interesting when you have the xover of the 1050 lower than the 150Hz of the sub: say you set the 1050 xover at 100Hz, the signal would have a -12dB/octave slope from 100 to 150Hz, then a -36dB/octave slope past 150Hz. Then again, probably little difference compared to using LFE input.

I think your best bet is to test by using onlythe LFE input, then experiment with the 1050 xover settings at 150, 60, and in between (you should hear some "holes" when xover=60). Then repeat the test with the speaker wires connected as well (this should fill in the holes).

My guess is that you'll use an xover setting around 100 with the speaker wires connected. I hope .

Enjoy your lab work, looking forward to the report.


[This message has been edited by urbnwndsfr (edited December 27, 2002).]