Any B&W 802 D3 users ?

[audio_engr]

Setting and adjusting B&W 802D3 in a large room (10.7 x 5.9 m) was not such an easy task for me.
I found out that the powerful bass-reflex was exciting modes in the room. I was suffering from sub-frequencies which were polluting the bass response in certain circumstances (see waterfall here-under and especially the bass on the left).

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I was 'obliged' to use an active correction and, after trying Trinnov and Dirac, I finally set up with Acourate (http://www.audiovero.de/en/acourate.php) to solve these problems. Here is the adjusted waterfall:

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An additional benefit of Acourate was the huge improvement of the time alignment of the drivers. B&W 802 D3 is not a perfectly time aligned speaker (this was confirmed by Stereophile measurements). And the improvement of the step response (see here under) considerably improved the sound image by ensuring that all frequencies were reaching the ears at the same time.

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Very interesting post ... 

Could you please share your system as a whole ?  (didn't see your signature)