Will this be effective or am I wasting money due to the recessed lights?[QUOTE]
This will decrease your effective STC number/$ ratio drastically, yes.
Originally Posted by HTSteve
...Reduce noise upstairs so it is not so obnoxious for my wife when I am cranking it...No kids...more acceptable for my wife, without blowing the budget.
Type in backer boxes and see what that search brings you (This will give you the cheapest solution and still give you 52 STC). This should be done for every penetration into the outer DW shell of the theater.
You will likely want to create 8 small backer boxes of MDF with 5/8" DW with GG in between and sealed with acoustic caulking where the electricity comes in and around the seams.
I know it seems like a lot of work but it is worth it.
If you really wanted to eliminate sound from upstairs to downstairs and vice versa you would do:
GG/DW/GG/DW in-between the joists (eliminate foot fall noise from walking above), then pink fluffy OC703 or something similar (eliminate resonance), then clips and hat channel (to decouple) (see https://www.soundproofingcompany.com
) backer boxes to help with holes in the structure, DW/GG/DW (all 5/8" DW) DW for mass and GG for Dampening. (Buy GG in 5 Gal. buckets)
The higher STC the better:
No DW etc... between studs goes from 76 to 66 STC
No Clips and Channel will go from 66 to 52 STC
No backer boxes will decrease the number even more.
Rabbit hole provided: FWIW IMHO