freq response below 100 Hz (1 Viewer)

[Yogi]

Last night I calibrated my stereo channels with the sub ofcourse to reference levels. Then I went on to measure the freq response of my system in two channel by measuring SPL levels at seating position while sending 20-20K warble tones. My freq response is quite flat from 100-10K (+/- 2.5 db) but below 100 Hz I have two nasty peaks at 80 hz (92 db) and 40 Hz (103 db). Is that normal? if not what can I do apart from moving my sub in order to address this?

 

[John Royster]

Yogi,

Its pretty normal. This is your room mucking with your bass. A BFD equilizer can help as can moving your sub.


notice how you have 40 and 80 hz. awful symetric ain't it?

 

[Yogi]

Thanks John, I think thats what I need to tame these nasty modes.

Thanks again.