porting and polyfill ?

[SMALLFLAVOR 10+ year member]

i have 2 cerwin vega 12D4's

they call for 2.22 cubic feet ported box tuned at 35 hz

for each sub

well i have a 1.3 cubic feet per chamber sealed box

how much poly fill do i need to make the sub think its in a 2.22 foot3 box?

and after i install the poly fill should i still port it at 35hz?

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