jimmyjazz wrote on Wed, 31 October 2007 11:52 |
What is this "limp membrane", and by what mechanism does it (allegedly) increase absorption? Are we talking about a true bass trap now, or are we still talking about more typical broad-band absorption? Ethan?
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Yes, our traps are more than just rigid fiberglass in an attractive and sturdy frame. All of our bass trap products have a limp-mass membrane behind the front fabric. This membrane serves two important purposes:
1) It increases absorption substantially at bass frequencies compared to plain rigid fiberglass or mineral wool the same thickness.
2) It is semi-reflective at mid and high frequencies. This lets you put enough of them into a room to truly tame the low end, but without over-absorbing higher frequencies as happens with plain rigid fiberglass and acoustic foam. I have 42 (!) RealTraps in my 25' by 16' living room, and the bass is fabulous yet the room is absolutely not dead sounding. Anyone here who's near me (Western CT) is welcome to come by to hear it in person.
Please understand that MiniTraps and MondoTraps are
not tuned absorbers! The membrane does not function like the front of a tuned wood panel bass trap. The operation is still broadband, which is preferred for most rooms. The specific curve of absorption versus frequency in our bass traps sets them apart from all others IMO. This is an engineered product, not just 703 in a sack.
--Ethan