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Wednesday, June 13, 2012

The Grill Effect: Woofer Covers (4)

Reliable Hardware quantifies how acoustically open their various flat stock is. The more open to air flow a grill is, the less it reflects output back at the cone, and the lighter it will be for its type. I would never recommend anything less than 50% open.
expanded diamond cut - 63% open

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perforated 5/32" round hole - 62.4% open

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and in distant third:
perforated 3/8" square hole - 56.2% open

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After doing a lot of web crawling these seem to be the way to go for full-coverage metal jackets. My preference used to be the expanded diamond cut, but the 5/32 round hole grill has taken its place. Downsides to Reliable? Minimum order there is $25, and shipping for only one grill is rather high. So you may want to order something else there too

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