help with sub box

[Canadian93ranger]

i have 2 kicker l5 12" subs and i was wanting some design plans for a dual 12" ported box. i want to be able to move my seat and tilt it abit. thanks

 

[RonD]

Super-cab, I hope?

 

[Canadian93ranger]

Ya its a extended cab

 

[RonD]

Google: ford ranger subwoofer enclosure image

To get some ideas

You don't want the subs facing each other unless you run them in opposites phases(reverse +/- on one of them)

"like frequencies cancel each other out"
This means you will get "flat spots" when the same frequency waves meet.

Subs are there to generate low frequencies, these are long sound waves so travel longer distances, this is why you can hear the thump, thump of a sub from 5 cars back at a stop light but can't hear the song, lol.
So 2 subs in a Ranger cab is a bit much, but to each his own.

Because subs need to generate longer waves they need a larger box, you can add batting inside sub enclosure to "mimic" larger box size.

Wattage, this confuses most people.
Is 2 watts twice as loud as 1 watt?
no
10 watts is twice as loud as 1 watt, it is a 10:1 ratio

If you have a 100watt amp, and change to a 200watt amp you will get a 10% increase in volume, so it wouldn't even be noticeable to human ear.
If you have a 250watt amp you would need to go to a 2,500watt amp to get twice as loud.

So save your money, wattage numbers can be deceiving.
When someone brags about a 2,000watt system, say "oh, so twice as loud as a 200watt system"

Speakers will have a wattage rating, Continuous Power Handling, and possible Peak Power Handling
If Continuous is 100watts then amp should be 2.5 X 100 = 250watts, as long as 250watts doesn't exceed its Peak Limit.

There is also impedance of speaker and amp to consider
0 ohms is a dead short and will burn out an amplifier
Speakers come in 4ohm and 8ohm
Amps come in 4ohm and 8ohm
Some amps are rated for 4 and 8 ohms and will have 250watts at 4ohms and 125watts at 8ohms listed.
As the ohms go up the wattage goes down, but as the ohms go down the danger goes up, lol.
A 4ohm subwoofer at 50% volume can drop to below 2ohms at the amp on a heavy bass note, so close to a dead short.
So if you have 4ohm speaker then make sure the amp is rated for 4ohms.

If you connect two 4ohm speakers to one channel on a 4ohm amp that amp will not see 4 ohms it will see 2 ohms, and the first heavy bass note will send it to 0ohms and a dead short, bye bye amp or hopefully it's output is fused and blows the fuse.

 

[Mazda]

All what RonD says is absolutely correct !!!!

My only add is to just put 1 sub in. It will still give you the bass you "NEED". Maybe not what you want but believe me I have been doing bass in vehicles since I was 16 in 1986 when it all started in the mainstream.

Your insides and your hearing will thank you later!!!!

I have a 94 extended cab running a 8" 1 ohm sub at 100 watts and it plenty.

BTW just my own opinion!!!!!!

 

[Canadian93ranger]

Thanks for the input i have been looking around but its either a single bix thats ported or a dual thats not ported
Also have you ever installed a 7" double din deck in a ranger?

 

[Mazda]

Not in a very long time. You will loose your upper vent. But it can be done.

 

[Karbuster]

i am also very interested in this
as to the question of how many woofers, do you think one 12" low profile-downfiring sub with 1000w amp (assuming thats the rating of the woofer) would be pleanty for a supercab ranger?

and

the rangers should have space for the double din setup as its the same slotsize as the explorer or so i thought