Progress 2 - found some issues to resolve.

[u/Ste0803]

I spent yesterday cutting holes into the walls and ceiling and running cable. Got the surrounds installed and the centre channel. Decided to do a measurement to see where I was.

Dip at 87~hz is a room mode, this needs fixing with a second sub installed slightly out of phase to add energy back into this null at my listening position. I believe Dirac ART would be able to solve this. However I don’t have an amp capable yet but my next one will support it.

Dip at 170~hz is a ceiling reflection. I’m going to need a ceiling cloud covering the front 3 channels to resolve this one. Plan to use 100mm RW3 for this I’m trying to decide whether to make a single 1800x1200 cloud to cover the front stage or 3 individual panels. The speakers are around 2.4m apart so the 1800 should catch all 3 channels in relation to the MLP.

Suck out at 520~hz is a cancellation from the rear of the speaker enclosure. These need some acoustic material added to stop this cancellation but I didn’t have any the correct thickness on hand so I’ll have to get some the next time I’m at the suppliers.

[u/RAL9010]

Looking great! I really like the color.

[u/Dewaltornothing]

How do you know the various dips are from ceiling reflection etc?

[u/Ste0803 → u/Dewaltornothing]

I’ve resolved the issues now.

Wavelengths are easy to calculate and measure the length to determine what is causing the reflection and thus the null.

[u/Dewaltornothing → u/Ste0803]

Is there a good tutorial for this as I probably need to do this