Dockside Chat - who here knows car audio?

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View Full Version : who here knows car audio?


nate.
03-24-2012, 03:07 PM
who here knows car audio? i dont need someone who has installed a few cd players in their friends cars. i need someone to help me with sub enclosure calcs.

i need to install my stereo in the new truck and im stuck on the subs. i have 2 kicker c10's but think i might have room for 4. i had the 2 in my tacoma in 1.25 cubes each powered by the sub portion of my polk amp @ 2 ohms seeing 300 watts total. the amp is rated to 600X1 @ 1ohm and i figure i have 3.75 cubes (interior dimentions) max. is .93 cu ft too small a space?


freedbaby
03-25-2012, 07:15 AM
who here knows car audio? i dont need someone who has installed a few cd players in their friends cars. i need someone to help me with sub enclosure calcs.

i need to install my stereo in the new truck and im stuck on the subs. i have 2 kicker c10's but think i might have room for 4. i had the 2 in my tacoma in 1.25 cubes each powered by the sub portion of my polk amp @ 2 ohms seeing 300 watts total. the amp is rated to 600X1 @ 1ohm and i figure i have 3.75 cubes (interior dimentions) max. is .93 cu ft too small a space?

I don't know if I know car audio as good as you need but it sounds like not enough space. I think in this case the two in that space will hit cleaner and harder than the four in the same space. Will this be a sealed or ported box?

I just put two JL audio 10" W1's in my truck this week in a ported box. It's the largest box they made without going custom and it's a bit too tight. About the room your talking about. Sounds good, hits pretty hard but not like it would in a larger box. I'd put two tens in that space with a slightly larger amp and I think you get a cleaner sound a) because the speakers have more room and b) because the larger amp will deliver cleaner power at a lower level.

Ntrain2k
03-25-2012, 08:14 AM
If you are going sealed you will be close. Be sure to use polyfill. Make sure your space estimate does not count box materials, otherwise you will be surprised how much smaller it is.

If you are trying for ported you don't have enough room unless you are building a SPL burp box.


the_gooch
03-25-2012, 08:54 AM
You can download WInISD and run the calcs for the recommended enclosure to see where F3 is and then remodel it for the space you actually have to see where that shifts. Without running the actual numbers, if you really have .93 ft^3 per 10" Kicker you should be fine. May lose a little on the very bottom of the response compared to a bigger box but should be fine. As mentioned, stuff with polyfill.

Idiot
03-25-2012, 09:50 AM
more isn't always better in a smalled cab pickup truck. you will probably notice the output increases when you open your windows.

Ntrain2k
03-25-2012, 11:38 AM
more isn't always better in a smalled cab pickup truck. you will probably notice the output increases when you open your windows.

That is true in pretty much all vehicles. It's the difference between a "legal" measurement and outlaw.

DirtBusters
03-25-2012, 12:50 PM
.9 cubes for a 10 is ok for ported use. Especially for a kicker comp. I would build the box and tune it to around 35Hz ported. I was install manager at a car audio store for 3 years and worked there as an installer, sales, general manager for 10 years. You'll be fine at that airspace with 4 subs. We used to do 10s in right at about a foot a piece ported, 12s in anything from 1.25 to 1,75 ported. Hell, I have puts 12s in under 1 foot sealed. If you need a box designed, shoot me your max measurements and I will tell you your port length and size. I have BassBox Pro

Idiot
03-25-2012, 01:02 PM
That is true in pretty much all vehicles. It's the difference between a "legal" measurement and outlaw.

my point is that is especially true in a pickup truck.

Ntrain2k
03-25-2012, 01:50 PM
.9 cubes for a 10 is ok for ported use. Especially for a kicker comp. I would build the box and tune it to around 35Hz ported. I was install manager at a car audio store for 3 years and worked there as an installer, sales, general manager for 10 years. You'll be fine at that airspace with 4 subs. We used to do 10s in right at about a foot a piece ported, 12s in anything from 1.25 to 1,75 ported. Hell, I have puts 12s in under 1 foot sealed. If you need a box designed, shoot me your max measurements and I will tell you your port length and size. I have BassBox Pro

You might be able to put them in a ported box that small, but it is far from ideal. Putting it in the smaller box is going to give it a much narrower peak range and remove quite a bit of the low end.

Min Rec Vented Box Volume (CU. Ft., Liters)** 1.25, 35.4

Min Rec Sealed Box Volume (CU. FT., Liters) 1.0, 28.3

He is much closer to the sealed volume recommendation.

nate.
03-25-2012, 03:29 PM
i have always done sealed boxes and gotten great results. in order to maximize volume i plan on making it one big chamber. it will be braced in between the subs to increase rigidity.

with the cost of kicker c10's being $59 each im gonna get 2 more and build the box for 4 of em. if there is insufficient low bass ill just cut a new front panel for the box and run 3 10's.

Ntrain2k
03-25-2012, 03:38 PM
Add the poly fill and I think you'll have plenty of bass unless you are going for SPL.

Fill the box with it very loose, not packed.

nate.
03-25-2012, 03:45 PM
ya i know the poly fill rules. if done in the right amounts it slows down the sound waves in the box making the sub act like the box is bigger.

nate.
03-25-2012, 03:46 PM
all edges will be liquid nailed, screwed, then glassed.

DirtBusters
03-27-2012, 01:45 PM
I would use wood glue in place of liquid nails. Also, if youre going ported, I would skip the polyfill. We only used it in smaller sealed enclosures. This is the consensus of everyone I worked with. I have actually consulted with them, as I have been out of the game for a few years. Combined we have over 50 years experience in the car audio game, competing, designing competition systems. Take it for what its worth. The program I use doesnt lie:

truculenity
03-27-2012, 02:26 PM
isobaric? ported! nah...thats just silly

Ntrain2k
03-28-2012, 08:51 AM
I would use wood glue in place of liquid nails. Also, if youre going ported, I would skip the polyfill. We only used it in smaller sealed enclosures. This is the consensus of everyone I worked with. I have actually consulted with them, as I have been out of the game for a few years. Combined we have over 50 years experience in the car audio game, competing, designing competition systems. Take it for what its worth. The program I use doesnt lie:

Don't see where anyone said anything about using polyfill in a ported enclosure.

nate.
03-28-2012, 04:53 PM
isobaric? ported! nah...thats just silly

I don't have room for an isobaric setup.



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