Enhanced Room Correction is Here!

[MCG555]

This shows Left Speaker & Sub, Right Speaker & Sub and Left, Right & Sub. Any thoughts on the cause of the dip at 164Hz with Left, Right & Sub when it isn't present in either the Left or Right responses?

View attachment 16035

Is blue the aggregated one?

 

[slartibartfast]

Is blue the aggregated one?

Yes, can't believe I didn't say that

 

[MCG555]

This shows Left Speaker & Sub, Right Speaker & Sub and Left, Right & Sub. Any thoughts on the cause of the dip at 164Hz with Left, Right & Sub when it isn't present in either the Left or Right responses?

View attachment 16035

Yeah, interesting! 1+1 seams not always =2

 

[harkpabst]

This shows Left Speaker & Sub, Right Speaker & Sub and Left, Right & Sub. Any thoughts on the cause of the dip at 164Hz with Left, Right & Sub when it isn't present in either the Left or Right responses?

View attachment 16035

The answer should be in the individual phase responses of the left and right channel. Try plotting those on top of each other and limit the display to say 100 - 300 Hz.

I don't see any other possible reason but the phase difference between the left and right sound pressure.

 

[slartibartfast]

The answer should be in the individual phase responses of the left and right channel. Try plotting those on top of each other and limit the display to say 100 - 300 Hz.

I don't see any other possible reason but the phase difference between the left and right sound pressure.

If that is the reason what would you do about it?

 

[MCG555]

If that is the reason what would you do about it?

What I would do: increase gain at that spot by 3 db via EQ / Q factor = 3 and see if you hear a difference…

 

[slartibartfast]

What I would do: increase gain at that spot by 3 db via EQ / Q factor = 3 and see if you hear a difference…

I have done a stereo room correction which fills that dip so I can compare the results.

 

[harkpabst]

If that is the reason what would you do about it?

I guess there's not much you can do except moving the speakers. At 160 Hz the speakers are completely omnidirectional, so the combined direct sound plus reflections would appear to be out of phase. There shouldn't be any issue with the direct sound, so I would try working on the reflections.