box question and port width question

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cam3888

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Ok so I'm planning to wall 2 21s in a 1999 Honda prelude, might have to go with 18s but would like to know if these 21s can work

1.with just the using the backseat area after displacement I can only get around 11.8 cubes with 2 21s,but if I built into the trunk a little bit I could get closer to 17 cubes. The trunk part would be shorter and narrower than the main part of the box though

Main:

H:35

W:53

D:21.5

Trunk:

H:13

W:30

D:up to 28"(leaves room for batts and amps

Would look like a crt tv lol

Could I build into the trunk without sacrificing quality/loudness/response? I would think only total volume matters

2. I would like to do a center port, but to do so and get enough port area my port width would have to be 7". Is this too wide or would it be fine?

 
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