CarForum.net - Car Forums, Automotive News and Community
Home Gallery Register Calendar Members List

Go Back   CarForum.net - Car Forums, Automotive News and Community > In Car Electronics > Audio

Reply
LinkBack Thread Tools
Unread 03-10-2010, 11:07 AM   #1
Member
 
Join Date: Nov 2009
Posts: 87
Rep: 10 chevymeister is on a distinguished road
Default I think I need a new alternator/battery.

Last year sometime in the winter I purchased a jbl bp300.1 amp and a 12" punch 2 rockford fosgate sub.


Over the whole winter i'd have my alternator failing and my batteries dying on me. I finally found out it was the sound system killing my car and I added in a toggle switch for the amp and I have kept it off for awhile with no issues anymore. I guess my alternator isn't powerful enough to keep my amp going and if I turn my volume pretty high I get dimming lights and such. The most efficient way to solving this would be new bat/alt right? How easy are those to switch out and are they extremely expensive/hard to find (alt specifically).

Thanks. <-- car noob lol.

chevymeister is offline  
Reply With Quote
Unread 03-10-2010, 11:21 AM   #2
Veteran Member
 
legoman786's Avatar
 
Join Date: Jul 2006
Location: Tucson, AZ
Posts: 886
Rep: 17 legoman786 is on a distinguished road
Default

For starters, you might want to look into a deep cycle battery charge system. It may not help with the dimming lights, but it will save your batteries.

Also, look into bigger alternators for your car. They are slightly more than your stock alternator, varying on your car's make/model. These will help your dimming lights problem, slightly at best.

Car audio enthusiasts have multiple alternators with multiple batteries rigged up to handle the excessive load of their systems, but I guess you know that.

For the cheapest method, look into rigging another battery onto your existing charging system. Most beginner car audio enthusiasts do it this way, and hey, it works.
__________________


legoman786 is offline legoman786's Gallery  
Reply With Quote
Unread 03-10-2010, 02:26 PM   #3
Jack of all Trades
 
tofunater's Avatar
 
Join Date: Feb 2010
Location: Batavia, IL
Posts: 1,398
Rep: 77 tofunater will become famous soon enough
Default

A single 12" sub and a 300 watt amp should not be enough to completely deplete your system, much less require an additional battery. What car do you drive?
__________________
My rides:
--2012 Chevy Sonic LT hatch back w/1.4 liter turbo w/100k
--2005 Chrysler Pacifica w/175k - SOLD!
--1987 Chevy R10 Pickup w/80k
--1997 4.3L Chevy Blazer w/193k- SOLD!
--1998 Oldsmobile Aurora w/190k - SOLD!

tofunater is offline tofunater's Gallery  
Reply With Quote
Unread 03-10-2010, 02:42 PM   #4
Member
 
Join Date: Nov 2009
Posts: 87
Rep: 10 chevymeister is on a distinguished road
Default

Quote:
Originally Posted by tofunater View Post
A single 12" sub and a 300 watt amp should not be enough to completely deplete your system, much less require an additional battery. What car do you drive?
I just noticed my username and the fact there is no correlation to my car experience, wow, how did I choose it back in the day.

I drive an 03' cavalier. My moms boyfriend really thinks it's the sound system, I don't know what else can make my car die 10 times in a month and the alternator I have in it now is new. (Battery is too) He thinks the alternator isn't capable of restoring energy after turning the amp on.

How exactly would I hook another battery up, i'd have to charge it right?

chevymeister is offline  
Reply With Quote
Unread 03-10-2010, 03:02 PM   #5
Jack of all Trades
 
tofunater's Avatar
 
Join Date: Feb 2010
Location: Batavia, IL
Posts: 1,398
Rep: 77 tofunater will become famous soon enough
Default

The stock alternator is supposed to output 105 amps, your sound system would draw a maximum of 25. Does the battery deplete while the car is running, or just if you leave the amp on while the car is off?
__________________
My rides:
--2012 Chevy Sonic LT hatch back w/1.4 liter turbo w/100k
--2005 Chrysler Pacifica w/175k - SOLD!
--1987 Chevy R10 Pickup w/80k
--1997 4.3L Chevy Blazer w/193k- SOLD!
--1998 Oldsmobile Aurora w/190k - SOLD!

tofunater is offline tofunater's Gallery  
Reply With Quote
Unread 03-10-2010, 03:03 PM   #6
Member
 
Join Date: Nov 2009
Posts: 87
Rep: 10 chevymeister is on a distinguished road
Default

Quote:
Originally Posted by tofunater View Post
The stock alternator is supposed to output 105 amps, your sound system would draw a maximum of 25. Does the battery deplete while the car is running, or just if you leave the amp on while the car is off?
I usually find it dead in the morning, but it really hasn't done it since I installed a toggle switch for the amp (so I can turn it off instead of it turning on with the car) and for some reason I thought I seen 60 on that amp, let me go double check.

chevymeister is offline  
Reply With Quote
Unread 03-10-2010, 03:09 PM   #7
Jack of all Trades
 
tofunater's Avatar
 
Join Date: Feb 2010
Location: Batavia, IL
Posts: 1,398
Rep: 77 tofunater will become famous soon enough
Default

Who installed the amp? Most amps are set to turn on when the head unit tells it turn on via a trigger wire. Mine waits about 5 seconds until after the unit turns on, which gives everything else in the car a chance to turn on and for the engine to turnover. If whoever wired up your amp didn't do that, then your amp was not only on continuosly, but it was also on at peak load when the car was trying to turnover.
__________________
My rides:
--2012 Chevy Sonic LT hatch back w/1.4 liter turbo w/100k
--2005 Chrysler Pacifica w/175k - SOLD!
--1987 Chevy R10 Pickup w/80k
--1997 4.3L Chevy Blazer w/193k- SOLD!
--1998 Oldsmobile Aurora w/190k - SOLD!

tofunater is offline tofunater's Gallery  
Reply With Quote
Unread 03-10-2010, 03:16 PM   #8
Member
 
Join Date: Nov 2009
Posts: 87
Rep: 10 chevymeister is on a distinguished road
Default

It turned on with the head before. I just talked to my moms boyfriend, just said tons of people I talk to think it's fine (Others have told me that as well:S) but he says at continuous load it doesn't have a chance to recover and everytime I turn it on it's continuous. I also slammed into a curb last december before everything started acting up so he thinks maybe a possible grounding issue is going on. What may be shorted that would affect this, just the alternator wire? Another thing is, (i lol'd but) my wiring to my amp / battery is also bigger than the actual wires going to the alternator, think large wiring could do this? :P Thanks for the help thus far.

chevymeister is offline  
Reply With Quote
Unread 03-10-2010, 03:27 PM   #9
Jack of all Trades
 
tofunater's Avatar
 
Join Date: Feb 2010
Location: Batavia, IL
Posts: 1,398
Rep: 77 tofunater will become famous soon enough
Default

wire gauge is dependent upon amperage draw. Think 4 lane highway vs 8. If the demand is for 200 cars to come through, the additional 4 lanes are useful, but if you only have 2 cars, it doesn't really matter how many lanes you have.
Translation: Its not an issue
An amp does not draw max load all the time, it is a dynamic load and will change depending on how much power the amp requires to drive the speaker at a given volume at a given moment. Have you tried keeping an eye on the dash battery level indicator while you drive and listen to music?
__________________
My rides:
--2012 Chevy Sonic LT hatch back w/1.4 liter turbo w/100k
--2005 Chrysler Pacifica w/175k - SOLD!
--1987 Chevy R10 Pickup w/80k
--1997 4.3L Chevy Blazer w/193k- SOLD!
--1998 Oldsmobile Aurora w/190k - SOLD!

tofunater is offline tofunater's Gallery  
Reply With Quote
Unread 03-10-2010, 04:16 PM   #10
Member
 
Join Date: Nov 2009
Posts: 87
Rep: 10 chevymeister is on a distinguished road
Default

Quote:
Originally Posted by tofunater View Post
wire gauge is dependent upon amperage draw. Think 4 lane highway vs 8. If the demand is for 200 cars to come through, the additional 4 lanes are useful, but if you only have 2 cars, it doesn't really matter how many lanes you have.
Translation: Its not an issue
An amp does not draw max load all the time, it is a dynamic load and will change depending on how much power the amp requires to drive the speaker at a given volume at a given moment. Have you tried keeping an eye on the dash battery level indicator while you drive and listen to music?
Dunno what this indicator is, I never have any lights on other than the one lit up to tell me my nighttime lights are off.

chevymeister is offline  
Reply With Quote
Reply

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -5. The time now is 08:31 PM.

Shogun Interactive Development Copyright 2015 Shogun Interactive Development. All rights reserved.