SP4/BL 18" box

[ncc74656 2]

I own a BL and am buying an SP4. will this box design work perfectly for the SP4 and well enough for the BL? did i screw up on anything?  at the bottom of my port i have bracing crossing it, will this be an issue? should the port be fully open down to the bottom of the box?  i could not find any great info on port area for the SP4 so im sitting a bit over the 16 multiplier right now. i was thinking of adding a bit of that fluff to the box to make the sub feel it was in an enclosure closer to 8 cubic; is this a good idea?

 

im going for SQ at high volume, or at least as much SQ as the SP4 can give me.

 

what should i change, all opinions welcome. thank you.

 

http://imgur.com/a/JJ7XV#0

 

^ box design and maths

 

most people seem to ask about electric so ill throw it out there. i run a factory alternator with factory battery banks. all 00ga connections between my 2 2600ca semi batteries, 4ga grounds to body and 0 ga to frame and block. the factory alternator puts out 230A @ 2100RPM. currently i have no issue with the ZX1500.1 but dont now what to expect with a BC3500@.5 ohm, guess ill find out.

Edited March 14, 2013 by ncc74656

[ncc74656 2]

sooo, does this box have the proper port area and build? is the sub placement in the middle alright or should it be lower down on the face?

[ncc74656 2]

here is a build that i think is my final for my SP4 18"

 

at a 33hz tuning and using single walled 3/4" MDF with a double baffle i dont think i need any more bracing, do i?

 

[dbsupra 69]

Specs should be ok. I can't tell how far the bracing starts but you'll need atleast 12" to clear the motor.

What diameter is the rod?

[ncc74656 2]

1" rod

 

i have factored in the sub mount depth

[dbsupra 69]

Ok just making sure. When I swapped in the sp4 from the q I found out I didn't lol. On my phone its hard to make out the dimensions.

You may need a small brace in the port but other than that looks solid to me.

[ncc74656 2]

ill add a couple more braces to the sides of the port and call it a day. i am thinking of creating slots to hold the port in the walls. i ordered my sub on the 11th and was told 20 days to completion so im eager to receive a shipped email.