Open baffle system measurements

tamas juhasz

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Hi Everyone . I have an open baffle system consistin of a pair of Spatial audio X2 and a Pair of H-baffle subs . I started to measure the subs first using REW . The initial setup setup is that both subs and mains are 6 feet from the front wall . initial measurments are without treatments except some absorbant panels on the windows and some 2 inch decorative panels on the left side walls . I am including pictures of that and the room . The basement where it is is far from ideal 33' x25'x8' (LxWxH ) . As the MDAT file shows it has significant modal interference both below 20 HZ and a few above it . I placed corner bass traps ( Gik acoustics ) into the corners besides the fireplace with no attenuation of modal peaks . ( essentially no changes pre and post treatment ) . I have a minidsp 22D whit built in Dirac . my question is should I try to use the Subwoofer PEQ controlls to tame some of the modal peaks and then do the Dirac calibration ? or let Dirac do all( minus the crossover setting which i am going to do when i measure the main speakers with REW . On point I moved the sub around ( just a few feet on the longitudinal axis of the room with no changes in the measured response . I could do a microphone crawl but within a reason i would like to keep some of the Aesthetics of the room .
 

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skid00

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I think it would be useful to manually reduce the peaks. It might make it 'easier' for Dirac to create filters.
 

ddude003

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I would be looking for more bass trapping (corners floor to ceiling) and wide band absorbers... Also a partition on the right side from the front wall to the pillar might help with some acoustic symmetry...

I always recommend a look at http://arqen.com/bass-traps-101/placement-guide/
 
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