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Need help with room and speaker setup, big dip from 250-80hz

I have a very small and odd room.  The room itself is 9' wide by 10' long with 9' ceilings.  The wall directly behind my head is only 3' tall, above that it opens up to my family room and kitchen.  I have the speakers firing down the 10' length.  The speakers (Sonus Faber Guaneri Evolution monitors) are toed in directly at my head, 3' from the front wall, and 1.5" from the sidewalls.  I have bass traps in the corners, absorption at the 1st reflection points and ceiling, and a mix of absorption and diffusion on the front wall.  My listening chair is right up against the short back wall.

I just did a quick measurement of my room using a cheap RS SPL meter and some test tones.  It seems I am -6db at 630hz and 250-80hz.  Any advice what I can do to help alleviate these dips?  As you can tell by my room dimensions I do not have a lot of flexibility.  Thank you.
128x128tboooe

Showing 3 responses by theaudiotweak

theaudiotweak
2,774 posts
 
Your missing bass maybe on the ceiling..measure up there. There are ways to redirect the pressure not negate pressure as with the traps. Tom 
theaudiotweak
2,774 posts
 
Sir

You have not taken the floor or the ceiling position out of the equation when you moved the speakers. You moved the speakers relative to the walls not to what is above or below. All speakers have a speaker floor bounce cancellation relative to the distance of the bass driver. You can have much the same cancellation from that same driver to the ceiling though at a different distance and frequency. If your monitors can be placed on the floor or on  shorter or taller stands or supports for testing this will give you more insight into a placement to reinforce the frequencys you are in search of. Tom
theaudiotweak
2,774 posts
 
The rug will act as a comb filter and could add some benefit, a natural wool rug will be best..but will not help at 80hz. Tom
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