JRace

Go ahead and finsih the drywall and paint it. Paint it a flat (important) darker color. THere will be areas that have no room treatments - and you want that as a dead room is not cool.

As for room size it will depend on screen size and desired amount of seating.

What are your requirements?

theboy

46"- 53"ish seating 3 front 4 rear?

Haunz

iTrader: (3)

Thats true.. but I dont think its considered against code to use ply or chip and not drywall over top??... plus if the foam that covers it is fire retardant you should be all good...

I guess this brings up a point that you might want to call your local building inspector and discuss what you can and cant do...

LMAO... most musicans just staple egg cartons all over the walls and ceiling in thier jam room... now that has got to be a fire hazard...

Brandon

iTrader: (1)

There is sounddeadening insulation you can buy too.....to go between the studs behind the dry wall, I have that stuff in my house as well as the regular stuff....it works well, when I fire up my 3200Hp Ford F250 Diesle with the 49's and the 21" of lift, it doesn't wake people up [img]graemlins/thumb.gif[/img]

But it IS good stuff. As for putting up drywall or not, you SHOULD do it because it will look nice....and then maybe build some of your own bass traps, diffusers nd absorbers.

theboy

Whats a bass trap?

theboy

can you buy wall panels with the egg carton shape or close to it?

JRace

Yes you can be panels of sound absorbing and sound diffusing materials.

A bass trap is somthing that traps the bass and stops standing waves. Bass traps are needed to tame low freq response.

good info here:
http://www.ethanwiner.com/basstrap.html
It also has plans for diy bass traps.

So for room size, if you have a 43-53inch display you will want to be between 4-6ft from the display.
Plus you will want some room behind the seats, anywhere from 2-8ft. If you plan on running rear surround speakers then more room is better.

I would plan on building a 6-8inch stage for the display and front speakers and then another riser for the rear seats. How high will depend on what you use for your front row.

Once you have a room layout in mind we can then talk about where to put the diffusers, absorbers and bass traps. (best results using all three)

JohnVroom

There are many who make these foams and the inexpensive ones are quite flammable (polyurethane). For a more inert foam look to melamine or polyimide foam. I am not too sure the foam being flammable or not is a big deal ... but foam insulation is what caught on fire at the Great White concert in RI a while back.

For echo absorption most acoustical companies make soundboards using framed fibreglass (pink stuff) covered in acoustical cloth. I am using 3M Thinsulate for that effort in the car.

Not all sound in a room that hits a wall needs to be absorbed so controlled diffraction panels are often used as well.

As mentioned, floating a wall is a good idea for isolating a room and dampening with a PVC barrier is pretty common too.

Pay attention to making the room draft-tight, air gaps around doors, vents, electrical outlets etc. allow sound to travel unimpeded from room to room

JohnVroom

Spray in foam is fairly common as well. Using a low or medium density foam that doesn’t aggressively expand (so it won’t bow the sheetrock or the wooden studs) is a good way to seal off air leaks and increase the R-factor of the room to boot