Hello,
Please look at my attached room frequency response. I measured from 20Hz up to 2kHz out of the right channel only using a RS SPL meter for mic. The mic was placed in the main listening position. I have heard the RS SPL is not reliable above 500Hz, but still this graph has me depressed. Is this comb filtering? Is it as bad as it looks or are most rooms in worse shape? The deep null at 140Hz has me really worried. I don't think it's a sub phase issue as it shows up even with the subs turned off. How does one fix this kind of nasty response?

Please look at my attached room frequency response. I measured from 20Hz up to 2kHz out of the right channel only using a RS SPL meter for mic. The mic was placed in the main listening position. I have heard the RS SPL is not reliable above 500Hz, but still this graph has me depressed. Is this comb filtering? Is it as bad as it looks or are most rooms in worse shape? The deep null at 140Hz has me really worried. I don't think it's a sub phase issue as it shows up even with the subs turned off. How does one fix this kind of nasty response?
