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Alternator or battery?


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Posted

I'm planning a system rebuild in my blazer which will include a single fi q 15, 4 cu ft box@30 hz., still deciding on the amp itself but something rated at roughly 2000 rms @ 1 ohm. Right now all my electrical is stock, so with this build I will be upgrading the battery under the hood, big 3, 1/0 run to the back possibly to a distribution block depending on the size wire the amp accepts.

So my question is along with my current plans I will be getting either a second battery in the back or a 270-300 amp h/o alternator. Because of the cost I would much rather buy a second battery but what do you guys think? My stock alternator is only 100 amps and I'm just not sure if 2 battery's will be enough to keep up with the output of this system. What's the consensus? Thanks in advance.

Vehicle: 2014 GMC Sierra 2500HD WT

Head Unit: Pioneer DEH-

Mids/Highs: Focal Integration ISC 165’s (front) 

Subs/Amps: TBD

Posted

If you watch the volts closely and dont listen to it at max for more than a few minutes at a time... Yeah you will still need an alternator. How much research have you done, there might be a cheap OEM upgrade... And for what its worth, if you are looking for a 2k rms amp it should have 1/0 power inputs. Dont go cheap on the amp :)

Posted

Alright I'm looking at amps from dc, sundown, Rockford, soundqubed, etc. but I'm looking to buy the amp used and the sub new. I like playing full tilt for long periods of time as my daily commute is over an hour each way. Do u think the alt and upgraded batt under the hood would even be enough? It's not a huge battery even because in these trucks they have the smaller side post battery's only. Or will I new the additional battery and the ho alt to be able to do what I want with it??

Vehicle: 2014 GMC Sierra 2500HD WT

Head Unit: Pioneer DEH-

Mids/Highs: Focal Integration ISC 165’s (front) 

Subs/Amps: TBD

Posted

Those amps at that wattage, you're looking at 270a alt and a xspower d3400 under the hood and thats a good start. Shit gets expensive real fast when you break the 1k watt barrier

Posted

I guess this is going to be a much longer buil process than I anticipated. Just adding the numbers in my head I'm at $2k easily lol. Electrical first, then equipment!

Vehicle: 2014 GMC Sierra 2500HD WT

Head Unit: Pioneer DEH-

Mids/Highs: Focal Integration ISC 165’s (front) 

Subs/Amps: TBD

Posted

And what's the OEM upgrade you were talking about? I have to say I have never herd if that before now.

Vehicle: 2014 GMC Sierra 2500HD WT

Head Unit: Pioneer DEH-

Mids/Highs: Focal Integration ISC 165’s (front) 

Subs/Amps: TBD

Posted

I suggest the alternator.

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