Need help with a box

[joker4096 10+ year member]

I have a 99 honda civic hatchback and i want to run a 15" sub at around 1700 watts or so. I understand that i should use a ported box and i want to build it myself or have someone do it for me. Probably will be a RE SX dual 2. The max dimensions would probably be 29 wide, maybe 20 depth and 15-16 height. i might be able to go higher if i remove the cargo cover. Which way should i build it, subs up, port back? probably going with a slot port

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[DNick454 10+ year member]

For a hatchback, yeah... you'd want subs up port back. For a 15" SX for daily music purposes, I'd say something around 3-5 cubes around 30-35Hz. Also, 1700 watts is a bit much for a SX, they're rated at 1000W RMS, so unless you plan on tuning high and doing burps for competition use, I definitely would watch your gains and sub excursion the first time you play it.

 

[joker4096 10+ year member]

i was thinking now of going with 2 12's or would the one 15 be louder? Should i do a box like in your sig DNick454?

 

[thegreatestpenn 5,000+ posts]

you can do wider than that in that civic. you should be able to do 36" wide between the lid bars, you'll just have to start at an angle when you go to put it in. and you can do 16" height

 

[joker4096 10+ year member]

its a hatchback, that is the maximum width if i do not cut the rear plastic panels

 

[thegreatestpenn 5,000+ posts]

oops, my bad missed that part. you'll get very loud in that car btw. my friend has one, he's always louder than my trunk civic no matter what I throw in it

 

[joker4096 10+ year member]

lol i love these cars, easy to get loud with minimal equipment

 

[406er 10+ year member]

For a hatchback, yeah... you'd want subs up port back. For a 15" SX for daily music purposes, I'd say something around 3-5 cubes around 30-35Hz. Also, 1700 watts is a bit much for a SX, they're rated at 1000W RMS, so unless you plan on tuning high and doing burps for competition use, I definitely would watch your gains and sub excursion the first time you play it.

3-5 cubes. thats pretty broad. and have you have played with RE subs. pretty much the whole line up sans the RE RE can take 75%-100% more of there rated power.

to the OP, due to your power on tap, go for 3.5 to 4 cu ft. tuning from 30-34 for fatest bass. as Dnick said, sub firing up, port point back ala CRX

 

[406er 10+ year member]

i was thinking now of going with 2 12's or would the one 15 be louder? Should i do a box like in your sig DNick454?

a pair of SX 12s?? tough call. more cone area with the 12s, but less then optimal power going to each, VS less cone area but 75% recomened power. i think i would do the 15!

 

[joker4096 10+ year member]

i am willing to upgrade the electrical a bit and run 3k watts or so, just fitting 2 amps will be difficult, so i might just keep it at 1 that can put out some good power. For the 2 12s, would that box specs be sufficient?

 

[Mike465 10+ year member]

If you need a box built PM me for a quote