I'm building a new home theatre 7.1 system in a basement media room and am currently in the framing stage. My initial thoughts were to use Polk 265-LS (mains), 255c-LS (centre), 700-LS (surrounds and rear), and DSWPRO505 (sub).
I'll be using a projection screen at the front of the room which is an exterior wall with 2 x 4 framing, insulation, and a cement basement wall. This is where the 265-LS and 255c-LS in-wall speakers would be located. Surrounds and rear speakers will be in-ceiling speaker (I have 18" between ceiling and floor above and I wasn't planning on using enclosures).
Question..........unfortunately, my local Polk dealer told me that I should avoid putting the 265-LS speakers in an exterior wall because air movement behind the speaker was important and with insulation in the exterior wall, this would negatively affect performance.
I'm not sure I agree - but I can't find anything to suggest that exterior wall placement of Polk in-walls is acceptable. If possible, I would like to avoid building an enclosure as that would reduce the effectiveness of the insulation (although, if I have to, I will).
Has anyone done this successfully? Was it done with an enclosure built to allow for the Polk recommended 1.2 cu ft of air?