Gik soffit traps are broadband traps. They likely will not work as good as the ACDA traps for stuff around 50hz. I took a quick look at the Acoustic Sounds stuff. They make nice quality cabinets, but I think the cost is a lot higher. For example, the ACDA-12 will do just about the same thing as 3 of the GIK Scopus traps (about the same surface area). And the GIK traps will be about 70% of the cost of a ACDA-12. The Scopus will be cheaper to ship since they are only 2 foot x 2 foot each. The ACDA is a tuned membrane type bass trap that is centered at the 50hz frequency. So, absorption is 100% at 50hz, but only 60% at 40hz. Very similar to a GIK Scopus trap. You can have GIK custom build a Scopus trap for a certain frequency (though they have 3 standard models for 40hz, 70hz, and 100hz).
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I didn’t really test. I made limp mass for 63hz, and am in the process of making a set for 50hz. These are two bass nodes in my room. Google for “tims limp mass” to see what I did. One of the mistakes people do on these is to use Owens 703 for the damping. The 703 is too dense and actually reduces the box area. I used acoust-a-stuff from parts express. |
GIK Monster Bass Trap with FlexRange Limiter works very well between 75hz and about 300hz, while not absorbing much above that. Anything below 75hz really needs a tuned membrane or limp mass membrane, like the GIK Scopus. Don’t get me wrong, the Monster Bass Trap will do some absorption under 75hz, but not as good as tuned/limp. I have used both. |
I bought this stuff for the limp mass. It’s better than the vynil stuff: https://www.ebay.com/itm/Neoprene-Rubber-Sheet-Strip-1-4-Thick-x-24-wide-x-10-Feet-long-FREE-SHIP/281773665932?hash=item419b04ee8c:g:aOQAAOSwuLZY4J0t i think i used 1/8” for 63hz, and will use 1/4” for 50hz. It all depends on desired cabinet depth. Thinner neoprene requires deeper cabinet. |