Alan Go

Hey all,

I currently have 2 12" subs which I got right before i bought my Z. It used to be in a regular ported box but it didn't fit in my Z so I had to get this custom one.

However when it's turned up, the bass is very strangled if that makes sense. with the old square box it sounded boomy but with my Z I have to turn the subwoofer to -4 otherwise when I turn the volume up it sounds throttled.

I believe the air space for my box is .9 cb ft per side, and it has a mounting depth of 9".
Would the box that takes up the whole trunk make it sound better? but those boxes have 1.10 cb ft of air space and 7 5/8 mounting depth so I'm not sure if it'll make a difference.

If anything I'll probably get a box for 1 12" sub or 2 10s, not sure yet. thanks in advance and here's what I have atm.

travlee

iTrader: (8)

sale the 12s and get a rear facing box for dual 10s. you will be happy

Alan Go

to go under the strut brace? how much different do dual 10"s actually sound compared to dual 12"s for low notes?

craig12895

iTrader: (7)

I have 2 12s in my car, my box is also custom made and it is also not ported.
And judging by the size of your box, yours actually looks bigger than mine. Ive never had any problems with mine and I think it sounds great.

JMII

How big is this custom box? How much air space do your subs require? Ported at what frequency? What size port? Lots of unknowns here.

Speakers are only as good as the box they are in. My normal means of attack is figure out how much space you can spare then work backwards from there. So if the air space you have supports 10" then do 10"s because stuffing 12" into a small space will not get you anyway unless you've got massive power levels to force the speakers to play lower/louder.

Ported boxes are almost always bigger then sealed, but are louder at their tuning frequency. If the box is too small it will not hit / go very deep.

Alan Go

I was actually going to get that box the guy has up there but I didn't want to make my trunk unavailable. I think the mounting depth in that one is less too.
These are the specs for my box, but I couldn't find the amount of air my Memphis subs needed. :/

I'm guessing my subs need more air space? when they were in a ported normal box in my old car they hit any bass level really well but with this box, when it needs to hit a deep level it sounds very constricted. i don't want to get that box that fits in my actual trunk if it's going to sound the same, so maybe I should get 2 10"s or just stick to 1 12" sub. kind of stuck. I mean it sounds alright just not at higher volumes, the bass doesn't hit as hard as my old box.

travlee

iTrader: (8)

that has the air space needed for 10s...

Alan Go

including the box the guy posted up there? it was quoted at 1.10 per sub for the box that goes in the trunk, but I feel like mine have less than what it's stated as because its angled on the side the amp is hooked on.
This is probably why there's not a lot of people I know with dual 12"s in their Z's

JMII

So this new box is sealed? Same amp? If so that explains it as ported boxes are generally louder.

But without the specs for the subs I have no idea what size box they should be in, or if they optimized for sealed or ported.

At 1.0 cu ft per side you can still run some 12"s. On the budget side you've got Infinity Reference, JL Audio W1, Kicker CompVR, Image Dynamics and I'm sure there are more. These are just brands I've dealt with personally.

jdmfetish

iTrader: (3)

if you are going to dedicate the trunk, you also could remove the spare , jack , and Styrofoam

then you actually have quite a bit of space

I have done that I use a 15" ported

Alan Go

im not sure if I'm quite ready to dedicate my whole trunk especially if I need to remove my spare tire. but here is a quick clip on the sound I was referring to, not sure if you guys can hear it but it's kind of like a droning noise especially when the bass is +2 or +3 out of +8. I always have it on -4, and volume is never above 25/50
<embed width="440" height="420" type="application/x-shockwave-flash" src="http://v8.tinypic.com/player.swf?file=2cx7ia&s=8"><br><font size="1"><a href="http://tinypic.com/player.php?v=2cx7ia&s=8">Original Video</a> - More videos at <a href="http://tinypic.com">TinyPic</a></font>

not sure if you can see that because I can't on my phone but here's a link
View My Video

craig12895

iTrader: (7)

I removed my spare tire and jack equipment. I didn't even use that area but my spare was useless anyway being that my car didn't come with the Brembos but now I have them

Alan Go

took my box all apart last night and padded the inside with polyfill. decided to go with the sheets instead of the ball stuff, and made about 3 thin layers and made sure nothing was touching the sub, it improved the bass and I can have it at 0 instead of -4. not sure if I should add a couple more sheets but I don't want my stuff to catch on fire, how much should I put? the bag didn't have the weight

JMII

http://nousaine.com/nousaine_tech_articles.html download the article on box stuffing.

I don't think it will catch fire, but there is a point at which is stops helping. 1lb per cu. ft. is a easy rule to remember.