Originally Posted by corradizo
That attic is begging for an IB sub or two or four and you'll save space in your room.
This SHOULD be your very first choice when considering subs!!!!
IB subs take up ZERO floor space, unlike every other sub on the market or DIY. And all the DIY subs are beyond huge (b/c you can't DIY the electronics to DIY a tiny sub). Just too much space for bass. And, as you have already stated and titled your thread....space is a premium here. I would put a manifold with two 18's in front and another manifold with two 18's in the rear. The reason for a pair in each manifold is to eliminate vibrations and the reason for two manifolds in different locations is to greatly assist in smoothing out the bass response.
I separated my IB subs for this exact purpose and it worked like magic. I would also consider some ON or IN wall speakers to save more space.
If you're that confident that you don't mind the sound escaping, then I would NOT
invest in the cost and mess of adding more drywall and expensive GG and pads. I would simply relocate the return vent, add some IB subs, install some in/on wall speakers, hang some DIY acoustical panels and call it a day.
After that MINIMUM investment in both COST and TIME, I would run through some movies and music. IF the sound escaping the room turns out to be more than YOU expected.....then at that time
you can go to the trouble and expense of adding another layer of drywall and GG and pads.....But I definitely would NOT do it before seeing if the noise bothers you since you already have stated that it's not a big deal at this time.
Hope this helps!!!!
One other thing to remember regarding the trouble+expense of going the DD+GG route.....All that will be for not if you don't change your entry doors AS WELL
!!! Those double doors are probably hollow, so any amount of sound isolation you do to the walls will be MINIMAL since you still have a large hole in that wall.
That's why the whole sound isolation thing can become VERY expensive. It's pretty much an all or nothing sort of thing.