jekeke

I really need help with some designs for a sub box for 2 12 inch INfinitys and 2 10 inch jls to fit all in the same box. Also it needs to be ported please send me some designs. Thanks alot these are specs on the subs for size of box.



http://mobile.jlaudio.com/pdfs/8551.pdf
The guide for the jls has sizes
10W1v2-4

http://manuals.harman.com/INF/CAR/Boxes%20and%20Parameters/1250W.pdf
This is guide for INfinity
1250w Reference 12 inch sedan

Please help me I have 2 of each and I need the box to fit in a Volvo 960 1997

I'll take some measurements of the trunk later if needed thanks for the help!

Lord Huggington

iTrader: (1)

Don't bother mixing different sized subs. Different brands makes it worse, but don't worry about that because porting all four in the same box is even worse. If you have a 12" playing a 40hz tone, while a 10" is trying to reproduce the same tone using the same airspace, because the airspace requirements are different, it will sound like piling a 50hz tone onto a 40hz tone, and you won't be able to hear either ___hz or __hz clearly, they'll just cancel eachother out, the last time I heard one of these setups my friend was using a 10" & 12", the 10 was ported and the 12 sealed, it was hard to tell what frequency you were listening to, it was all one tone, when it tried getting low, it'd sound high. Your box will produce a limited frequency range that isn't accurate. Either sell the 10's or the 12's and get two more of the same ones. If you want 4 ported 12's, thats atleast 10 cubic feet, or 5-6 for a sealed box, and 5-7 cubic feet for 4 10's ported. Why don't you just use the 2 12's? You need to hear someone's good stereo, 2 ported 12's in a proper setup, even on low power (1000 total), is a lot of bass, and is that a hatchback? Hatchbacks get louder and sound better than trunks. Have you heard your subs? I think you'd be much happier with the Infinities over W0's. I've heard them (1 12, 2 12, 2 10) each in sealed boxes (the Infinity Ref) and they hammer and sound great. Maybe stick the 10's in the doors and crossover too-high, or something, but, I don't think you will. Using 4 low-budget 10's or 12's in a ported enclosure is pointless. You need a huge box, and you could of gotten louder with 2 beefy 10's and more power. If you use different subs on the same amp, your amp will also get screwed up. Different subs have different coils, and you won't get the desired ohm of either 1, 2, or 4. I'll bet you don't want those subs now. Do you have an amplifier? Volvo 960 hatch's are huge, why would you use four subs? Why not use a high performing (1500W) 15, or an 18 when you have the space! It'll be worlds better and the same price.

jekeke

Lol i got the 10s for 150 with the alpine amp and so far i have the jbl 600 hooked up 2 channel to the 2 12s and then the 2 10s hooked up to the alpine the 12s are in a duel portedbox in the trunk and the 2 10s are in a duel ported box in the back seats of the car it is a sedan and it is like 5x louder with the 10s then just the 12s im more then happy with the way it sounds i just need a way to fit htem all in the trunk with a ported box so and yes I want each sub seperated from eachother. But thanks for advice.


So one box with 4 walls inbetween subs with right airspace for each sub and seperate port for each sub. Trust me its ALOT louder and ALOT more bass which is what I was looking for.

Yes I have two seperate amps

The 10s are 300 rms a peace, the alpine is a 1 channel 600 watt rms class d amp the v12 I cross wired the 2 10s to go into the 1 channel both subs are 4 ohms crosswired they run at 2ohms and the amp pushes 600rms at 2 ohms x 1 channel

Then infinitys are 4 ohms each at 300 rms each and the jbl pushs 300 rms each channel at 4 ohms so the subs match each amp perfectly and they sound amazing now just wanted the 2 10s in the trunk with the 12s rather then in the backseat lol

mustaine4prez

Clearly this is a topic you know a bit about. you answered it quite well so I dont wanna stay long.but I would like to add a few things. if for what ever reason you do decide on using all 4 subs. just make sure there all in there own chambers within the box and use there own ports. in this situation I would recommend sticking with a sealed box.
You can mix up the sub sizes. I was successful with my box. I'm running one 12inch and two 10's in my car right now and I have never herd my system sound so good.

jekeke

Thank you all for your advice I do appreciate as the knowledge you can gain from car audio is infinite. I really do appreciate it alot. Ye I am leaning more toward for seperate boxs connected non ported with the 2 10s on the inside lower towards the bottom the 2 12s on the outside high up to the top all so its kind of opposite of the 10s for looks. all sepearte walled off airspace for the subs and I need the right ammount of airspace for each one obviously.

Lord Huggington

iTrader: (1)

If you crossed over the same brand/model 1-8", 1-10", 1-12", 1-15", 1-18", it'd sound like sex.

Sealed box 1 12's - approx. 35hz tune @ 1cuft & 30hz @ 1.5
Sealed box 1 10's - 20% less (*0.20) .8 & 1.2

I've done this before. Because of the different motors I heard two distinct sounds and they didn't mix well. I used all sealed boxes, three Eclipse LMS 12's (two in one box, one in one) with a RE XXXv3 12 in its own box, all had 1.2 cuft. It was also in an eagle talon hatchback, off 1500W, all upfire. As how it'll sound with your setup - it was loud but far from SQ but only because the motors sounded totally different. Sell the 10's for two more 12's and seal em. It's just like listening to two stereos at once, atleast aim for matching brands and sizes lol.

jekeke

Yeah I know but im budget and 2 10s n 2 12s is better then jus 2 12s lol its like 5-8x louder. Plus if they are all in one box in the trunk with sealed walls it would sound more then loud enough but i know what your getting at if i sold the 10s and then bought two more infinitys which are cheap as **** compared to the jls so i could probably sell the jls for as much as 2 infinitys would cost your saying the 4 infinitys would be l ouder then 2 10s ne 2 12s.

My question is

the 10s are 300rms each
the infinitys are 250rms each

so 2 10s 300 rms each and 2 12s 250 rms each is louder then

4x at 250 rms each isnt it?

jus wondering getting facts strait. I can understand how the db interacts with the two different subs and it quites it down a bit.

Also if i just went with 2 l5 12 inch kickers 600 rms each and hooked 1 up to the 600rms alpine and crossovered the other hten 600rms jbl in a duel ported box would be louder then all of this?

Or should i sell my amps to and get

2 15 l5 12 inch 600 rms each and then 2x 600 rms 4 ohms x 1 channel class d amplifiers and hook each one up to each sub. or a 2 channel 1200 watt rms at 4 ohms which is better?

Lord Huggington

iTrader: (1)

Two 12" L5's each on half RMS (300W) would be louder and would last longer. 1200W amps are very cheap ($150-$200/ebay). L5s are quite a step up from Reference & W0. Your W0 .PDF is a W1 .PDF, which do you have? If you have two different 600W amps, sell one and buy another of the same or both and buy one, you're not losing $, and you're gaining everything. Those amps might not be able to do what you need them to. Is it dvc 2/4, svc 2/4 ohm?

Infinity & W1 .pdf's say 84dB SPL1w/1m
Kicker L5's have 85.6 dB SPL1w/1m - louder with less power with ability to upgrade to 1200 total.

The reference subs will sound better than the L5s. If you want both worlds, get two JL 13.5" W6's, a 1000W amp, and a box that isn't made by duel, LOL! Get a custom box made or make one yourself for $50. Those duel boxes are ported at around 45hz just like all other manufacturers' fart boxes.

I found this on craigslist. That's $160 per thing that you get. That's not bad.

2 JL Audio 13.5w6 w/ a kicker ZX1500.1 Amp and Capasitor - $800 (Daytona Beach)

"For sale are 2 13.5W6 JL subs, kicker zx1500.1 amp and a capasitor. This system POUNDS. Definitely the loudest i have ever had. Nothing is wrong w/ the subs or amp, only been used for about a month and have never been turned up to full power. If you would like i can split up the subs and i have one box which is ported that the sub will fit in that i will let go for $350 (sub w/ box). you can reach me at 386 631 3896. system is still hooked up in my explorer so you can hear it first"