2. misc-audio
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Can you correct nulls with acoustic treatments.

I have Magnepan 1.6's. After hearing a musical clarity I really liked in a listening session at someone else's house, I broke down and bought a Rat Shack SPL meter and dowloaded some test files. I wanted to see if it was the acoustics or the type of speakers and system that made the difference.

A brief testing showed a 65 to 80 hz., 5 or 6 db. bump (the drywall bump?) that I had expected. What I didn't expect was 10 to 15 hz. wide nulls (-10,-15,even -20 db.) at several other frequencies.

I tried moving speaker positioning and the frequency of the nulls moved but the pattern was basically the same.

Acoustic treatment to tame + nodes seems intuitive. Can you treat nulls or is this a different problem?

Would really appreciate your thoughts.

Jim S.

stilljd

Showing 1 response by audiooracle

audiooracle
387 posts
 

You have to understand the nature of nulls, meaning that a null is a depression in frequency response due to cancellation effects based on room interaction.

A null can not be tuned out by passive attenuation which is what room treatments can accomplish. You must redirect the energy by repositioning or by adding more bass energy to compensate for the null.
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