Open baffle system measurements

tamas juhasz

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Oct 22, 2018
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Medina,Ohio
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Preamp, Processor or Receiver
EAD ovation
Main Amp
EAD PM 1000
Universal / Blu-ray / CD Player
oppo 103
Front Speakers
Gershman rx20
Center Channel Speaker
Gershman rx20
Surround Speakers
SVS
Subwoofers
rhytmic sealed 15 inch X2
Screen
100 fixed
Video Display Device
JVC dila
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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I think it would be useful to manually reduce the peaks. It might make it 'easier' for Dirac to create filters.
 
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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