JackD201 ,
I hear ya. A bit of magic liquid is a temporary quick fix to everything.
Sourcing the right fabric could be easy when you are lucky. A quick stroll along the streets of Divisoria can get you the right stuff at bargain prices. That is where I got the grill type fabric that I used for our own treatments.
What sort of acoustic treatment do you have in mind? I still have a big stock of rigid fiberglass and I can lend a hand in completing your treatments.
arnie,
The mystery of the missing bass can probably be attributed to:
1.) the rear of your speakers (where the ports are presumably) are firing into the windows which when open are perfect sound absorbers: the bass goes out and it never gets back.
2.) your speakers are now firing into your cabinets which are essentially panel bass absorbers
3.) since there are cabinets behind your listening position, you are essentially farther away from the rear wall where maximum bass pressurization occurs.
Since the problem with your room is lack of bass and not too much bass - you need every bit of bass reinforcement you can get out of your walls. I suggest you setup and listen along concrete walls instead.