Adding a second battery - Audio & Electronics Forum

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Adding a second battery
Tuesday, May 15, 2007 12:36 PM
Ok, i've been having problems with my amp for a while, i keep blowing fuses whenever i turn them up gain is like a mm above 0 bass is on 0 and the sub output is on 0, whenever they go up past 27(out of 35) it blows a fuse, i've got a Kenwood kac x812D amp and 2 alpine type r (4ohm) subs the subs are wired to 8ohms each and i'm running 4 gauge wire. Whenever i look at the volt gauge right before it blew a fuse it would be somewhere below 11v so i added another bettery today and now the voltage fluxuates a l lot but never goes down past 13 yet i still am blowing fuses. i've got the batteries wired as follows, 4 gauge from first battery to second battery positive terminal 4 gauge wire from second battery ground to the chassis 4gauge wire going from positive of the second battery to the amp, then 4 gauge wire going from the ground terminal to the amp.
if someone would't mind helping me out i'd be greatly appreciated


2003 White Cavalier LS Sport Coupe

Re: Adding a second battery
Tuesday, May 15, 2007 12:43 PM
How do you have the amplifier grounded?

If you have a poor ground, its like a marathon runner, running while breathing through a straw, it can do it for a while,but eventually dies.


Elemental Designs
Performance.Mobile.Audio.
alexl@edesignaudio.com
Warehouse Manager


Re: Adding a second battery
Tuesday, May 15, 2007 3:24 PM
The low voltage wasn't the cause of the problem, it was a symptom. You're blowing fuses because your amp is drawing high current. Drawing high currents will cause the voltage to drop because of the resistance of your power wiring (voltage drop = current x resistance).

You need to find out what's wrong with the amplifier, speakers or speaker wiring.
Re: Adding a second battery
Tuesday, May 15, 2007 7:58 PM
I had it grounded to where my Amp was grounded. inside the spare tire well (sanded it down first) How would i be able to figure out whats wrong with the amp? just try different subs to see if its the wiring? i can't think of any other ways...
thanks.


2003 White Cavalier LS Sport Coupe
Re: Adding a second battery
Wednesday, May 16, 2007 9:38 PM
try changing the connection from the battery terminal to amp.it helped me today

4 door civic on the way i need a daily driver
Re: Adding a second battery
Friday, May 18, 2007 8:34 PM
What do you mean by changing the connection from the battery to the amp? I have the Amp grounded right to the second battery.
Here is a quick sketch of how i have it setup., my second battery has top and side terminals.
http://i7.photobucket.com/albums/y285/InsaneStitch/ampdrawling.jpg


2003 White Cavalier LS Sport Coupe
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