Is all GOM fabric created equal?

[Vanhoecke]

I'm looking at GOM fabric to cover the interior walls (over linacoustic), proscenium walls (in front of main speakers) and soffit (which will double as bass traps). I have received several samples of GOM fabric. My question is all GOM fabric equal in terms of its acoustic transparancy? FR701 is a pretty loose weave (basically like a berlap sack) no much for the WAF. Three other fabrics which rate high on the WAF are Network 4158, Hieroglyphics 3516 and Anchorage 2335. Each of these is a denser weave than FR701. My thought was to use Network 4158 or Hieroglyphics 3516 on the interior walls (where I'm looking for some mid to high range absorbtion/diffusion), and Anchorage 2335 on the horizonal surface under the soffit (where I'm hoping to get some broadband absorbtion) and possibly the proscenium walls confused: if it will not interfer with the sound tranmisson from the mains). Is this ok, or should I stick with the FR701 (2100 Black) for the proscenium walls? In other words is FR701 beter than Anchorage 2335 in front of my mains? I couldn't find anything on the GOM site. Thanks

 

[bpape]

All are not equal. In front of speakers, stick with 701-2100 series. There are a couple others that are OK but none of the ones you mentioned - will try to get the chart later and post.

The ones you mentioned would likely still be OK in front of treatments - but not speakers. They'll seriously muffle the high end and the denser ones can even cause comb filtering issues like a bad perforated screen.

Bryan