Most acoustic products are made with fiberglass. If you're on a budget, you can buy fiberglass panels (not the big rolls), and use them for room treatments. If they work out, you can cover them with fabric so they look nice
Room treatments behind or between speakers?
Just wondering where people feel is the best place for room treatments on the front wall. I've seen people place panels on the wall between the speakers while others have placed them directly behind the speakers.