Equalizing for a large listening area (9 chairs)

[kallagtunet]

Hello calling all REW experts :-)

My first attempt with the REW program a wonderful tool thanks for making it. The other equipment i use is the Berhinger 8000 mic and a M-audio Solo firewire soundcard

I have a home cinema with 9 seats divided in 3 rows. The back row is up against the back wall and im not trying to do anything to equalize that challenge. The sub i have is for the time being SVS BP pluss/2 (not the sub with the flattest response from 45hz and up I understand). A pair of new subs is incoming (JL A F113). The SVS is located in front between right speaker and center. There are no other places in the room to have subs than between the front speakers and the center channel.

The first row the response look quite flat in the low end, on the second row I have a rather large top at 25hz. But in both locations I have a rather large recessed area between the 50 and 150 hz with both sub and main speakers running. I have tried to adjust phase and that seems to tame a narrow dip around 80 hz. And it seems to be a tradeoff between having a deep narrow dip and a wide and deeply recessed area or a sharp dip at 80 hz and a not so deep recessed area. See the two first row graphs.

Any hints of how to make the rater wide recessed area to best be chandelled?

The second row has a high top at 25 hz (se second row graph), I see that that can be tamed with the PEQ, but then probably I will get a similar dip at the front row. Any hints on best handling this?

I have not tried to apply any PEQ just yet hopefully some of you expert can lead me in the right direction before I start the Berhinger up :-)

Yes, I have just started this journey as you probably understand....

[brucek]

For sub measurements the standard REW graph axis to use is vertical 45-105dB and horizontal 15-200Hz. These can be entered and recalled any time into the Graph Limits Icon. Also make them 800 wide so as to fit the screen.

Your best bet when you're attempting to get a decent response across a large area is to take a number of readings (up to 8) and then Average them all using the average feature on the Averaging Tab. This will produce a new average response that you can then equalize. It's a compromise, but other than moving the listening position or sub positions, it's the best you can do.

brucek

[kallagtunet]

I try again, the curves in one chart this time. Both sub an mains playing.

[brucek]

Yeah, doesn't look too bad other than a consistent dropping around 80Hz. Perhaps playing with the phase could help there. Try some different settings that result in the best average response.

brucek