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Author Topic: Battery size  (Read 189 times)
Thundersoul
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« on: July 20, 2017, 08:49:51 PM »

I have a question about battery size and how to figure out how many amp hours you'll need....do I just measure the amps the amp is drawing and go from there?....or is there a formula....I am using 4 Hertz 6x9 HXC 690s...130 watts each RMS 280 watts max each....and  PACld10 driver...which I'm sure doesn't use much power.... the amp is either going to be a Polk PA 4000.4 ...125 watts RMS per channel class D has a 40 amp and 35 amp fuse....or it may be an NVX JAD 800.4..... 125 watts per channel RMS....class D ....1600 watts peak...has 3 25 watt fuses...can anyone tell me how many amp hours I will need to have it play for 10 hours....or what other info I need to figure it out?...thanks

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BDA2
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Posts: 131



« Reply #1 on: July 21, 2017, 02:53:09 AM »

http://www.motorboatyourself.com/forum/index.php?topic=587.0

http://www.motorboatyourself.com/forum/index.php?topic=1860.0

http://www.motorboatyourself.com/forum/index.php?topic=1681.0


Save your money and buy the Polk PA2000.2 and wire your four (4) speakers in parallel (2 ohm) loads.  This way you get the same wattage and the amp is cheaper and has a smaller footprint. 

Good luck and welcome aboard.
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BVYKA
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« Reply #2 on: October 30, 2017, 05:17:42 PM »

I have a question about battery size and how to figure out how many amp hours you'll need....do I just measure the amps the amp is drawing and go from there?....or is there a formula....I am using 4 Hertz 6x9 HXC 690s...130 watts each RMS 280 watts max each....and  PACld10 driver...which I'm sure doesn't use much power.... the amp is either going to be a Polk PA 4000.4 ...125 watts RMS per channel class D has a 40 amp and 35 amp fuse....or it may be an NVX JAD 800.4..... 125 watts per channel RMS....class D ....1600 watts peak...has 3 25 watt fuses...can anyone tell me how many amp hours I will need to have it play for 10 hours....or what other info I need to figure it out?...thanks

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With those amps I don't think you need a line-driver...

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