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Fi BTL SPL Port Size

quic1
in Fi Technical

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Posted

Is 324sq in per sub too large for a striclty SPL enclsure using 4 Fi BTL 18's in a 32cu ft. box

  • Author

I am so glad I found these subs, they remind me of the Rockford TRF subs

You need 500-750sqin of port area for SPL total

16 square inches per cubic feet would give you 128 square inches per woofer x 4 woofers = 512 square inches of port.

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