Originally Posted by jlpowell84
For the sake of learning let me ask a few questions. Since Audyssey did the EQ work on the fronts and the sub how would they undo some of the work Audyssey has done. I mean if audyssey set the towers to large at first then it would be ok right? Or is it cancelled because of the LFE+main selection?
First, the "double bass" is taking you away from "reference"
What is reference? 75db across the board?
For those using XT, the main impact of using double bass with Audyssey is explained in the FAQ answer I just linked to:
"Also, the XT and MultEQ versions of Audyssey apply more correction filters to the subwoofer frequencies. If the same frequencies are sent to the main speakers and the subwoofer at the same time, you will apply higher resolution filters to the same frequencies in the subwoofer and lower resolution filters to the same frequencies going to the front speakers. When the two low frequency sources are combined, we will have unpredictable results to say the least."
Double bass is just a bad idea. Audyssey campaigned for AVR manufacturers to remove it but they refused. It will cause potential phase cancellation issues, muddy or bloated bass, the issue mentioned above etc. Read the FAQ answer for a fuller explanation.
Reference is explained here:
Sweet, thanks gents.