Axiom Home Page Forums General Discussion Technical Questions Inwall speaker into ICF wall?

So I've just sold my house and all the speakers in my signature went with it. But now I am planning my new build just down the street. It is a smaller townhouse so no room for a dedicated HT, M100's, etc. I am looking into putting a moderate atmos set up in the living room with some M60's as the L/R and in-cabinet center channel in a custom low boy cabinet (which worked REALLY well with my last house).

Anyway in my previous build I used onwalls on the ICF walls and inwalls in any interior walls and it worked well. For pure WAF I was hoping to go mostly inwalls but most of the walls are ICF. The ICF being used is about 3 inches thick plus the depth of the drywall before hitting the concrete center. So does anybody have experience with this type of installation? Even if I can create enough depth from removing the foam I don't know how the cavity will affect performance of the speaker. Before the drywall goes up I can remove as much foam as possible however that just cuts into the sound proofing for our neighbors.

Oh and thanks to Axiom for making an in-ceiling speaker! This wasn't an option in my last build (Though I know the in-walls could have worked).