Alt for 13,000 watts

GambellaDiddler

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Hello everyone.

Im purchasing a 2017 Jeep Grand Cherokee SRT that comes with a stock alternator putting out 220A. The stereo I’m planning on is 3 SSA evil 15”subs with 1 crescendo bc 13k amp. I know I’ll need to upgrade the electrical. They do make a HO alt for my Jeep at 320A. Would this be sufficient to run the electrical, the stock stereo ( HK 19 speaks and amp( rated at 825w ) and the subs if I add a second battery?

Thanks for your input.
 
Thank you. What is the rule of thumb forAmps per watts?

There isn't one. Your current needs will depend on quite a few factors. In your case 13k of speaker power would equate to roughly 1100 amps of current draw after efficiency losses. You need 4 300a alternators and some supercaps to provide enough power, or you need a very large battery bank and 2-300a alternators.

You can either feed your amp with alternator power or feed your amp with battery power. What route you choose depends on how you intend to play and how long you intend to play.

Matt
 
Hmmm, ok. That might be more than what I actually want.

So this is for a daily driver, well I work from home so it’s more like a grocery getter. ( a toy I guess ) I like to play my music at full tilt. My current set up is 2 Memphis audio mojo 15. 1k rms 2k peak with a bc 3500w amp. It sounds good in the car, but what I’m after if shaking the ground loud.

Is that possible on 2 15” evils at rms ( about 8k watts) with the right box build and tune?

thanks again and sorry about my lack of knowledge.
 
Hmmm, ok. That might be more than what I actually want.

So this is for a daily driver, well I work from home so it’s more like a grocery getter. ( a toy I guess ) I like to play my music at full tilt. My current set up is 2 Memphis audio mojo 15. 1k rms 2k peak with a bc 3500w amp. It sounds good in the car, but what I’m after if shaking the ground loud.

Is that possible on 2 15” evils at rms ( about 8k watts) with the right box build and tune?

thanks again and sorry about my lack of knowledge.

There is a very large difference between 2k and 8k. 2k can be done with mostly stock electrical. Above 3k and you start needing alternators, above 5k and you need battery banks/more than one alternator. You also need alot of space and vehicle modification to support that kind of power/sound pressure level.

Sit down and think about what you really want. "shaking the ground loud" is not a feasible goal unless you have a spare $20,000 to throw around.

Matt
 
There is a very large difference between 2k and 8k. 2k can be done with mostly stock electrical. Above 3k and you start needing alternators, above 5k and you need battery banks/more than one alternator. You also need alot of space and vehicle modification to support that kind of power/sound pressure level.

Sit down and think about what you really want. "shaking the ground loud" is not a feasible goal unless you have a spare $20,000 to throw around.

Matt
Good point Matt. The majority of my build cash is going to the performance part of the Jeep. Supercharger, cam, exhaust, intake etc. leaves me with about 7-8 for the stereo.
 
OK, so set your budget to 7k.

Now you need to decide on what kind of loud you want to be. Getting loud at 50hz is alot eaiser than loud at 30hz. Do you want things to sound good or do you just care about being obnoxiously loud?

I've got 5k on tap for a pair of 18's. Never metered it, and it's not technically finished yet, but I'm happy with it. It plays loud and low, and that's what I want. I've spent roughly $3500 on my substage and amp getting things where they are. I need another 500ish to finish things up.

Matt
 
OK, so set your budget to 7k.

Now you need to decide on what kind of loud you want to be. Getting loud at 50hz is alot eaiser than loud at 30hz. Do you want things to sound good or do you just care about being obnoxiously loud?

I've got 5k on tap for a pair of 18's. Never metered it, and it's not technically finished yet, but I'm happy with it. It plays loud and low, and that's what I want. I've spent roughly $3500 on my substage and amp getting things where they are. I need another 500ish to finish things up.

Matt

For once in my life I’d like to have stupid loud.
 
For once in my life I’d like to have stupid loud.


Stupid loud breaks ****. You okay with that? :ROFLMAO:
broke roof.jpg
 
Not in the SRT

Then you aren't going for stupid loud. You start flexing the sunroof rails at 120db(using a Dayton AMM 1 mic, not the most accurate). I'm probably in the 130s down in the 20-30hz range and I've bent my trunk hinges already.

Stupid loud will bend and break things, if you aren't OK with that then stick with a pair of low-power 10's or 12's and make it sound good.

Matt
 
Lucky SOB you are buying one of my dream vehicles. Grand Cherokee with a SRT setup, but must be in Deep Black with matching wheels on it for a Vader look.

Make sure you also buy a bunch of sound deadener as well for the doors, roof and tailgate. Second Skin is really nice but the best stuff out there is Resonix. For a vehicle like that I would be using one of those two.
 
Lucky SOB you are buying one of my dream vehicles. Grand Cherokee with a SRT setup, but must be in Deep Black with matching wheels on it for a Vader look.

Make sure you also buy a bunch of sound deadener as well for the doors, roof and tailgate. Second Skin is really nice but the best stuff out there is Resonix. For a vehicle like that I would be using one of those two.

Lol well I sold my house and made out pretty good on it. So I can buy one of my dream vehicles. Im going for all black with just a tiny bit of red.
Second skin I currently have in my explorer sport. I’ll probably go with that again.
 
For once in my life I’d like to have stupid loud.
If the loudest you've experienced is 2kw, how did you land on 13kw? Everyone that's heard my 5kw has said it's the loudest they've heard (only people I know personally. We don't have comps around here). My neighbor across the street came outside to tell me to turn it down. My boss came storming outside the building to the parking lot to scream at me. I'm not trying to brag; I suggest you listen to a few well-designed setups so you get a feel for how much power you actually want. Equipment is expensive, but research is free.

Edit: My best score was a 149.7 on a spl labs mini meter. I don't know what I can hit currently, because even that is too loud to test/meter in town. In the past I have driven to a nearby OHV area to avoid pissing anyone off.
 
If the loudest you've experienced is 2kw, how did you land on 13kw? Everyone that's heard my 5kw has said it's the loudest they've heard (only people I know personally. We don't have comps around here). My neighbor across the street came outside to tell me to turn it down. My boss came storming outside the building to the parking lot to scream at me. I'm not trying to brag; I suggest you listen to a few well-designed setups so you get a feel for how much power you actually want. Equipment is expensive, but research is free.

Edit: My best score was a 149.7 on a spl labs mini meter. I don't know what I can hit currently, because even that is too loud to test/meter in town. In the past I have driven to a nearby OHV area to avoid pissing anyone off.

I’ve been around stereos all my life actually. 2k is the most I have ever had, but not ever heard/felt. I’m also an adrenaline junkie. Like my cars fast and my music loud lol. I go to the extremes on everything.
 
I’ve been around stereos all my life actually. 2k is the most I have ever had, but not ever heard/felt. I’m also an adrenaline junkie. Like my cars fast and my music loud lol. I go to the extremes on everything.
How did you land on 13k as your goal? That's more power than 99.9% of aftermarket car audio setups.

Do you like your cars fast or do you like your cars able to go fast? Do you like your music loud or able to get loud?

If you want to spend money for potential, I can relate, but say so. I'm only trying to understand your intended use.

As far as required electrical, listen to @Popwarhomie and @hispls because those guys are among the few on this site who have actually done it.

I'm not trying to be a prick; it comes naturally.

Best of luck and please keep us posted on your build.
 
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