'Wahooo. I finally got my rigind fiberglass. this is the thing, my father is a contractor and got me a great deal, here is the kicker, its 5/8'. will this do any thing on its own or do I really need to layer them. They are mostly gonna be High absorbers. Well I knew you guys would know. Oh yeah one more while im at it. What freqs am I looking at having a problems with doing solo acoustic. I guess what Im tying to say is, what are the problem freqs with an acoustic guitar. Thanks in advance all
tony
tony