opinions about a system setup

[chowdog 10+ year member]

i currently have 3 hifonics brutus 12's in an extended cab truck. am ordering the 4th one friday. im trying to figure out whether to go with 2 amp that are 1 ohm stable or just one amp that is 1 ohm stable with enough power to push all 4? any help is appreciated.

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[subzero 5,000+ posts]

how much power are you runing? If you want more spl there are a few things you can do. adding cone area is one thing, but how big is your box. I am thinking you need 6 cubes total with a pretty big port. 1 ohm stable amp 2400 rms or more power. according to sub specs, 1200 peak per sub. so that is 4800watts peak, I havent delt with Hifonics so I dont know if ther is legit or overrated... I would do a 3k @ 1 ohm amp... and get a custom box designed for high spl..

 

[chowdog 10+ year member]

i havent built my box for the 4 yet. im currently considering having 2 firing forward in a ported box and two firing up in a bandpass. thats why im thinking 2 seperate amps for the two seperate boxes or 12's. the subs are rated at 600 rms and 1200 max. i got 3 of them on a 1200 watt amp now but had to bridge the amp up to 8 ohm to run the three evenly, and it unlocks my back side glasses in my extended cab z71.

 

[chowdog 10+ year member]

im thinking 2 : 1200 watt rms @ 1 ohm hifonics brutus amps. one on each set of 12's

 

[chowdog 10+ year member]

the route of going with one amp is a hifonics brutus 2400 watts rms @ 1 ohm for all 4 12's

 

[subzero 5,000+ posts]

im thinking 2 : 1200 watt rms @ 1 ohm hifonics brutus amps. one on each set of 12's

that will be fine if you go that route.

what do you mean 2 fire forward and two in a band pass??? you need to do them all the same. to get best results. Trust me. put them all in a ported box and tune it correctly and you will be better off... Ask RAM_Designs to draw up some plans and he can help you or any other box builder. can too.

Since your adding power and more bass, have you upgraded any electrical or added any sound deadener? Those things can also help you get louder...

 

[chowdog 10+ year member]

electrical is fine except probably gonna need a bigger alternator after i put this system in. i was hoping to fire 2 forward and two up only having limited space in the extended cab

 

[chowdog 10+ year member]

i have a 2 farod cap and hoping it will be big enough im also running a mid amp on my eclipse mids

 

[subzero 5,000+ posts]

You can do something like that with the subs in the same box. Take a look at the build logs section. other people have done this.

I dont have a cap. I havent used a cap, but from what I understand, anything you add in the circuit becomes a load on your alternator. So, if your amps are pulling 200ampers and your batts are getting depleted and you add a cap, your alt has to keep up with all that... I am not sure exactly, but I think that would shorten the life of the alt???

 

[Bettr n' Revrse 5,000+ posts]

Do not use a cap and do all of them in the same box... I would use one amp as well...

 

[chowdog 10+ year member]

so 2 seperate boxes of 2 12's? one box firing forward and one box firing up?

 

[Bettr n' Revrse 5,000+ posts]

No one box with 2 firing forward and two up... Just PM Ram and he will get you a plan drawn up...

 

[chowdog 10+ year member]

Can someone ask him to send me an email

chowdog_20m@yahoo.com

 

[grandam888 10+ year member]

run 1 amplifier, no more than 2400 rms. Ignore all max ratings, they are BS. secondly throw the cap in the garbage, it useless. also if your running a 2400 rms amp, you WILL need power upgrades, preferably an HO alternator on an extra battery or 2 and 0 gauge wire to amps.

Put all subs in 1 box ported around 5 cubes as specs say max ported box is 1.25 per sub so 5 cubes for 4 subs.