Quote:
Originally Posted by 666666  I know some high-end bass traps advertise that they actually reflect a bit of upper-end frequencies as to not make the room so dead and lifeless. |
Yes, but that's not what you want on the ceiling. 703 or 705 two inches thick is the minimum, and four inches thick is what you really want. Auralex foam is an okay substitute is if it's solid, not sculpted.
--Ethan