batteries, 1200 watts, lights dimming

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shadowm891

Member - Posts: 23

Joined: March 11, 2009

Location: Oklahoma, United States

Posted: December 26, 2011 at 11:15 AM / IP Logged

Hi everyone i have a question. I have a 1200 watt mono block amp that is pushing a single 12 at 1 ohm. And i have a red top optima and a 180 amp ho alternator up front. But my lights are dimming when playing my music up. Now my question is i was told the yellow top optima's are great battery's for car audio and wanted to know if just one of these battery's would be more then enough for my single 1200 watt amp or would i need a better battery.

jmelton86

Gold - Posts: 1,228

Joined: February 07, 2007

Location: South Carolina, United States

Posted: December 26, 2011 at 3:13 PM / IP Logged

Have you done the Big3 upgrade?

https://www.the12volt.com/installbay/forum_posts.asp~TID~73496~PN~1

2013 Kia Rio -90a alternator

DDX470HD GTO14001 GTO1014D (x3)

Big3 in 1/0G

1/0G to GTO14001

shadowm891

Member - Posts: 23

Joined: March 11, 2009

Location: Oklahoma, United States

Posted: December 26, 2011 at 3:18 PM / IP Logged

yes i have with 0 gauge.

DYohn

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Joined: April 22, 2003

Location: Arizona, United States

Posted: December 26, 2011 at 3:26 PM / IP Logged

What's system voltage when this happens?

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shadowm891

Member - Posts: 23

Joined: March 11, 2009

Location: Oklahoma, United States

Posted: December 26, 2011 at 3:29 PM / IP Logged

I'm sorry i don't understand what you are saying.

jmelton86

Gold - Posts: 1,228

Joined: February 07, 2007

Location: South Carolina, United States

Posted: December 26, 2011 at 3:36 PM / IP Logged

Do you have a DMM (digital multi-meter) so that you can monitor DC voltage at the battery while the lights are dimming?

2013 Kia Rio -90a alternator

DDX470HD GTO14001 GTO1014D (x3)

Big3 in 1/0G

1/0G to GTO14001

shadowm891

Member - Posts: 23

Joined: March 11, 2009

Location: Oklahoma, United States

Posted: December 26, 2011 at 3:44 PM / IP Logged

no sorry no i don't only thing close i can get to one of them which i know chance are it wont do the job is one of them voltage reading off a top of a cap.

jmelton86

Gold - Posts: 1,228

Joined: February 07, 2007

Location: South Carolina, United States

Posted: December 26, 2011 at 3:53 PM / IP Logged

That will work, but I don't know how accurate it'll be. Play the system to loud listening levels (where you encounter the lights dimming) with the lights on.

Now monitor the voltage and see where it bottoms out at.

2013 Kia Rio -90a alternator

DDX470HD GTO14001 GTO1014D (x3)

Big3 in 1/0G

1/0G to GTO14001

shadowm891

Member - Posts: 23

Joined: March 11, 2009

Location: Oklahoma, United States

Posted: December 26, 2011 at 3:54 PM / IP Logged

when you say bottom out you mean voltage starts to drop ?

jmelton86

Gold - Posts: 1,228

Joined: February 07, 2007

Location: South Carolina, United States

Posted: December 26, 2011 at 3:59 PM / IP Logged

Basically. You'll want to see how far it goes down. -Don't let it go down past ~12volts, though. If it gets too low, turn the volume down or whatever.

2013 Kia Rio -90a alternator

DDX470HD GTO14001 GTO1014D (x3)

Big3 in 1/0G

1/0G to GTO14001

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