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AudioPostChris · 27th November 2009

Hi Jeffrey,

Thanks for the reply.

The sub is left corner of room facing the corner ( theirs Tri-Traps in the corners ) I tried flipping the phase not much change in the Null area but it eliminated lower nod ( bump ).

I played with LP filter on the sub I set it too low in makes null wider ( my bass Management is done by Blue Sky BMC at 85Hz )

Im away from my studio for the week-end so Im going give you my description of readings I did by memory ( Im going to try get someone at the studio to e-mail them to me )

I did measurements sub only roll off at about 150Hz and I do get the same null

Tried different speakers manufacturer "Null"

I put the sub in the mix position played 117 tone thru walk around the room found around the left speaker the sound almost dissapeared....

I did many reading probably 50, move the speakers in many directions the null was consistently there, also the measured in the back of the room and the front the middle same-thing

The one thing I did that made difference was the monitor on the floor behind my desk it lowered the Null ( around 85, if remember right )

I did Left and Right with Bass Management in Left the null dip is about minus -14 and the Right side - 24

I did reading with bass Management Off (bypass) I did have the nulls both sides

I did reading no sub null is still present

Also tried using waves surround controller and experimented with different crossover types and points...

27th November 2009	#14
AudioPostChris Gear interested Join Date: Nov 2009 Posts: 13 Thread Starter	Hi Jeffrey, Thanks for the reply. The sub is left corner of room facing the corner ( theirs Tri-Traps in the corners ) I tried flipping the phase not much change in the Null area but it eliminated lower nod ( bump ). I played with LP filter on the sub I set it too low in makes null wider ( my bass Management is done by Blue Sky BMC at 85Hz ) Im away from my studio for the week-end so Im going give you my description of readings I did by memory ( Im going to try get someone at the studio to e-mail them to me ) I did measurements sub only roll off at about 150Hz and I do get the same null Tried different speakers manufacturer "Null" I put the sub in the mix position played 117 tone thru walk around the room found around the left speaker the sound almost dissapeared.... I did many reading probably 50, move the speakers in many directions the null was consistently there, also the measured in the back of the room and the front the middle same-thing The one thing I did that made difference was the monitor on the floor behind my desk it lowered the Null ( around 85, if remember right ) I did Left and Right with Bass Management in Left the null dip is about minus -14 and the Right side - 24 I did reading with bass Management Off (bypass) I did have the nulls both sides I did reading no sub null is still present Also tried using waves surround controller and experimented with different crossover types and points...