Originally Posted by mtbdudex
Some progress on integrating the wides into the walls, RH side, It's been 5 years since I saw these guts.. Determine studs, wires, etc. cut.
Ready for drywall, a pocket in the wall, it will be lined with acoustic absorption material.
Bottom will be pine shelf to support the bookshelf speaker, goal is speaker to be flush with the side acoustic panels.
Here is RH side, primed shows some spots I'll add more spackle and re-do, hey I'm not the best at mudding
My LH wall is outside foundation wall, it is engineered concrete with concrete studs that are 9 1/2" deep and 24" center, so I built a box to insert into the cavity as shown.
Leftover 3/4" thick OSB works nice, it takes drywall screws pretty good.
For the back I had 1/2" birch ply, so used that, since I did not have a 21" x 12" piece of OSB, wood scraps always come in handy.
Glue and screwed, box 100% sealed.
I had to contend with HVAC 8" dia pipe, so the box "wrapped" around that for maximum position ability - angle wise - of the speaker
Used pressure treated 2 x 4 for top/bottom support, as they contact the concrete studs, and then able to also screw into the RH side concrete stud, it is faced with 1" thick wood strip for drywall attaching.
Box is very sturdy in there.
Honestly, making the speaker box outside of the wall and then "plugging it in" was much faster on the LH side than building it "in wall" as I did on the RH side, a small lesson learned.
With MLK day Jan 21st (next weekend is 3 day break) hopefully I'll have this done Tues Jan-22nd.