Box for 2 IDMAX v.3

[Demi 10+ year member]

I was messing with WINISD and i was coming up with some pretty outragous numbers. I want to run 2 12"s off of my HCCA-D5000. Went i looked up the size for a ported box (max flat response with at -3 at 30db minimum) it recommended 9.5 cubes, which i dont really think i can swing. I got pretty close at 4.4 cubic feet but to tune to 21hz it calls for a 400+in port length. Help!

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[Trixter 10+ year member]

what is the port area?

 

[iamamp3pimp 5,000+ posts]

those rec numbers from winisd are wack.

what car/power do you hav, and ill get you started with what to gun for

 

[Demi 10+ year member]

Ive got a 91 accord wagon and a Orion HCCA-D5000. Big three all 0 gauge, 110amp alt, and a yellow top in the back. I was playing with the numbers and i got it down to 4.4 cubes @ 21hz with the port only being 2o something cm. I forgot to save so i dont know for sure. I will try again when i get home from work.