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Tenson
02-08-2013, 03:10 PM
Hi guys,

I've been reading a 1977 BBC research paper on speaker cabinet damping and they mention using 'mild steel 25 BG' as a constraining layer. Can anyone tell me what 25BG is? I shoved it into Google but didn't get a lot. Does this indicate the thickness or just the grade?

Thanks!

deisel
03-08-2013, 12:08 PM
It may just mean b grade steel,25 gauge 0.0209 inch