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Duct board bass trap

post #1 of 2
Thread Starter 
My local HVAC has Johns Manville 4x10 sheets of duct board. I asked the part number and all he knew was 800 series.

1" was around $35 and 2" $50

is this what I need for the bass traps? I can't seem to locate the exact stuff on bob golds spread sheet to compare to OC 703

Linacoustic 100 ft roll 1" was $140 to be placed on front wall doubled up?
post #2 of 2
when all else fails order from out of town,

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