help me

[MattMan24 0]

OK i need to run through and make a check with yall to see if my demisions are rgith for this box and its ports ok

the box has 4.6 cuft and it will have 2 re sx 12's each displaces .16 cuft and a port that displaces .24 cuft so total displacement = .56cuft which gives the box roughly 4 cuft so i have the port 15w2H14L = 33hz

does this sound ok

[MattMan24 0]

tttt

[rushnrun 14]

you're right on the tuning... not enough port area IMO...

I'd say you need 50-60"^2 of port area...

if you make the port 3" wide it takes your length to 22

gives you 45 in^2

[MattMan24 0]

why do i need more port area?

[rushnrun 14]

well again IMO

You'll have quite a bit of port turbulence with such a small port..

My single SE had terrible port noise with 25in^port so with you having only 30 and twice the surface area......

**I think just about anyone will suggest that you run atleast 50-60in^2

[BigDaddy13440 3]

Try this:

Port Calculator

You'll need to know the XMax of those SX's, and your intended tuning frequency. From there, it's simple math.

[KU40 173]

wow that port calculator, while nice, is very liberal. It said I would have needed 80 sq. inches for my 15" SI D2. I built my box with about 45 and it was fine.

[BigDaddy13440 3]

Better to have a bit more cross-sectional area for your port than not enough.... I'd reasonably say that 70-80% of what they recommend is probably adequate.

So, for your 15" SI D2... that'd be 56-64 sq in of port. If 45 sq in worked for you, kudos to ya.