Originally Posted by AustinJerry
Sorry, Alan, my intention is not to pick on you, but your description of the sub distance tweak is oversimplified. It actually consists of two distinct steps. The first step involves measuring the two subs by themselves, and varying their distances to achieve the flattest response, for the sub channel only. Then measure both subs combined with the center speaker. Adjust the distances of both subs by the same amount in order to achieve the flattest response between the combined subs and the center at the crossover point. The sub distance tweak is not guaranteed to produce significant results (if makes very little difference in my setup, for example), but should always be tried to ensure the best results.
And why do you say that the graph scales are incorrect. We have agreed that the vertical scale should show 5dB increments, which it does, and that the horizontal scale should be 15-300Hz, which it is. I believe this is documented in the Guide.
HST, I agree with both you and Jim that the red graph looks to be the best measurement. Next step woul be to see the effect Audyssey has on placement B so we can make a final comparison.
Feel free to pick on me, Jerry. I don't mind at all.
In my defense, I wasn't aware the OP had an AVR that could calibrate dual subs separately. I also never heard that you should perform the tweak with subs+center....I always read it should be sub+FL/R.
If this indeed is the case, I've been doing it wrong for a really long time.
However, it has always produced dramatic results around the crossover point in my system
RE: graph scale. I obviously need to read the revised guide. Sorry about that. I'm just going by this post from kbarnes
, and have been using those settings myself for posting graphs since day one.
Again, sorry if I caused any confusion.