Originally Posted by Dean Roddey
There seems to be a logical flaw in his argument. If that would prevent sound from coming out, then the sound would have never reached the exterior walls in order to be reflected back so it wouldn't matter if it had walls or not. If any sound would have reached the external solid walls then it would be sound that wouldn't be kepted inside and therefore wouldn't be isolated.
By the definition of the word isolate you are correct, but now were arguing semantics.
If he was using a 15 watt crate amp that cost $100 I would agree with you completely. 8" of even the most rigid rockwool wont stop the noise of a 4x12 with a powerful head cranked to the point where the cabinet is reacting harmonically with the tone. Though, due to the reflection the total distance the sound would have to travel would be 16". That might be enough to completely stop all tones, but is it really worth risking when it being absolutely "isolated" isnt necessary?
Plus, depending on the construction, the box can be taken apart and used as bass traps when not in use. Moveable acoustic walls are my new favorite studio toy =] Drum iso, vocal booth, etc.
So OP, to answer your questions, yes
. I can stand on the opposite side of my 4" walls while drums are being played at full volume and hold a conversation at normal talking volume. 8" would be killer. thumbsup