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Old 11-20-07, 01:25 PM   #1 (Link)
 
rexscates
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Since: Sep 2006
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why would one front speaker have a 70hz drop and other 124hz drop


why would one front speaker have a drop at 70hz and other drop at 124hz. both drops are about 15-18 Db's. When I average the two together its close to combined reading but not the same.The average has drops of only 5 dB or so. the combined does not have either drop but a small drop at 100hz as explained below.

i swapped speakers and the drop is depenedent on the speaker location not the speaker itself.
I moved the sound meter it had only minor effect.
I opened the door to the treated theater and it had only minor effect
I only had one speaker on each time when measured so its not a effect on each other.

when i had both fronts and the sub on the drop as at 100hz. which is exactly half way between both speakers drop. now I was using the ramp up sine wave part of rew (standard mesurement effect from program) so i dont think that is the isssue.

the amp has no equalizer function set. I will confirm that. I think i have it all eq effects turned off.

any ides? its a treated theater. with 4 corner base traps, and all alls have 1" 304 insulation up to ear level. with front the 304 all the way to the celling. The one window has treating.
weird I can figure out why one side is so differnt than other.

any ideas before i expend more brain power.

ttyl
rex scates


Last edited by rexscates; 11-20-07 at 02:02 PM. Reason: bad wording

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