Originally Posted by kbarnes701
The response looks fairly good other than the region between 40 and 50Hz which merits some attention. (I am ignoring the chart above 90Hz as the mains will be kicking in by then.
This is exactly what I thought. Hence I was a little stumped why I felt the need to boost the sub so much for War of the Worlds. While its good with just a +4 dB boost, its just perfect with +7 (I can really feel the lightning strikes, the earth cracking open, etc)
I've been trying other positions for the sub but the options are pretty limited. The only other position I really have for the sub has a better response in the 40-50 Hz range, but is worse at higher frequencies, in particular, the dip around 60 Hz is much deeper and wider.
The general advice is to run the sweep as loud as you dare (with the brave going for 100dB). I generally go for about 90dB. Apparently the result is more reliable/accurate if you do this. IDK if it would affect your result much though.
I'll give this a try in the future and test if the responses match (aside from a uniform SPL bump).
In REW you can run a sub-only sweep by selecting Ch4 (I am assuming here that you use the latest version of REW which is HDMI/USB mic).
Thanks for that - I'm currently using an analog connection from my computer to the avr. Will try HDMI eventually.
You may be boosting by 7dB just as preference for more bass. I boost my dual F2s by 3dB usually for example. And remember that Audyssey aims to give a flat curve at Reference Level - many people find this anemic. I assume you use Dynamic EQ when listening (you are right to disengage it when measuring).
I don't really see a null in your graph in the 10-90Hz range. Nulls usually are very deep and go to a 'point' at the bottom of the inverse spike (more like what you can see at just over 100Hz) - what you have at 40-50Hz just seems to be a dip. You might be able to change that by moving the sub to a different location and measuring again.
Could it been that my sub 10 Hz response is too low? Yes, aside from when measuring, I always have DEQ on.
Incidentally, what many of us do is calibrate in Pgm 1 and then switch to Pgm 2 afterwards to get that extra oomph at the very bottom end. If you calibrate in Pgm 2 and run in Pgm 2, Audyssey will just EQ out the low-end boost.
Yes - I will try this eventually. Currently I'm still in the process of trying to settle on a good location. It sort of looks like I may have to get some bass traps.
I suppose the conclusion is that I just like it playing the film that way
I suppose others would watch this film at reference (I only watch at -10 dB from reference) and hence their experience of the bass would be similar to mine. Maybe having a small, untreated room makes the higher frequencies a bit much while for others with larger, treated room its not so much of an issue. Anyway, that's pretty much all I can think of...