I am in the construction phase of my home theater and have purchased the Invisa MPX's for the the sides. One of the MPX's will be mounted in drywall where there is a bump-out in the foundation. The open space behind it will be about 180 cubic ft. The problem is the bottom part will be open to the main room via a cloth covered false wall so I can gain access to that area as I will have AV stuff hidden there and I am concerned about the sound from the back of the MPX leaking out the false wall area. So I was thinking of building a custom enclosure for it. Any thoughts on size, etc? Any T/S parameters available?

Thanks for your purchase. You certainly can build an enclosure, a minimum of 1.5 cu. ft. will be fine. You might want to just try a piece of insulation behind the installed speaker first though.

I am considering the HTR 7000s and have the same concern. Is an enclosure required if my soffit opens into the main listening area?

Not required, but it certainly depends on the individual installation. A piece of insulation, as re commended in the installation instruction, kills off most of the back wave frequencies. If it is not being used full range (bass directed to a powered subwoofer), then bass frequency transmission is not really an issue. If it is a surround or effects speaker, even less concern.

I have kind of similar question, I have my theatre setup in loft temporarily for few months and then it will go in a dedicated room in the basement. I want to add MPX surrounds in 7.2.4 but don't want to cut holes in this temporary room, can I build a custom box to hold MPX for the time being and then will remove them in the dedicated room. If yes then what's the recommended size and any other specific insulation or something that I need to take care of

TechiMan wrote: I have kind of similar question, I have my theatre setup in loft temporarily for few months and then it will go in a dedicated room in the basement. I want to add MPX surrounds in 7.2.4 but don't want to cut holes in this temporary room, can I build a custom box to hold MPX for the time being and then will remove them in the dedicated room. If yes then what's the recommended size and any other specific insulation or something that I need to take care of

Yes, we have made some, used them at trade show exhibits (they're not big on holes in their walls either). The ones we had made sat on the floor, were typical wall-thickness (2x4 stud plus 1/2" drywall or plywood), were about two feet wide and maybe six feet high (so MPX would be at ear level). Sealed, standard speaker-box insulation, lightly stuffed. Paint them whatever the wall color is - they actually went unnoticed in our exhibits until pointed out.