The construction of the corner traps in Hugh Robjohns’ studio, made using 60kg/m3 mineral wool.
I’ll be building some corner traps soon and I’ve read that a lower‑density glass wool is more effective for a full‑corner bass trap than the 60kg/m3 type. But, not surprisingly, the Internet can provide conflicting information! In conjunction with 60kg/m3 panels around the room, with a cloud, would I achieve more absorption in the lower frequencies with deep, floor‑to‑ceiling (2.7m minimum) corner traps in three corners using lower‑density insulation?
SOS Forum post
SOS Technical Editor Hugh Robjohns replies: 60kg/m3 is the best all‑rounder density for broadband absorption and it’s structurally stable and self‑supporting, so it’s easier to use. A less dense fibre can have a slightly better efficiency at the lower frequencies, but it’s harder to use because it requires more support. Your approach would probably work, but much depends on the construction.
I installed three large corner traps in my own studio a few years ago...
I installed three large corner traps in my own studio a few years ago, and you can read about them in Making A Small Room Sound Good in SOS June 2020. The stacked triangles were RW3, which is 60kg/m3.