voltage dips after playing music for a bit

[jacka 10+ year member]

Right when I turn my car on, the music sounds great. But after about 15 minutes, I can feel/hear the bass go down a few noise levels. Not to mention a remote control stops shaking after about 15 minutes below my deck. I've read the voltage at 13.8 when my car turns on, and I wait til the remote stops shaking in my car and I go out and do another reading and its around 13.35-13.4. I asked my stereo shop about the big 3 and they are charging 75 labor fee... and they said it won't help, they suggested a cap instead. they also said the voltage dip isnt a problem as long as its still over 13, but I can still feel the difference. Anyone know what I can do or what the problem is? My system is about 1200 watts RMS. 1998 Passat V6.

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[SUB_URBAN 10+ year member]

Right when I turn my car on, the music sounds great. But after about 15 minutes, I can feel/hear the bass go down a few noise levels. Not to mention a remote control stops shaking after about 15 minutes below my deck. I've read the voltage at 13.8 when my car turns on, and I wait til the remote stops shaking in my car and I go out and do another reading and its around 13.35-13.4. I asked my stereo shop about the big 3 and they are charging 75 labor fee... and they said it won't help, they suggested a cap instead. they also said the voltage dip isnt a problem as long as its still over 13, but I can still feel the difference. Anyone know what I can do or what the problem is? My system is about 1200 watts RMS. 1998 Passat V6.

75$ labor charge wtf? it takes like 30 mins to do lol. why don't u diy?

 

[jacka 10+ year member]

hah yeah i was thinking about it, not too confident in my abilities though haha. will it help the problem though?

 

[Fast1one 10+ year member]

Big three should make a substantial difference if you do it with 0gauge wire.....I have yet to do mine. I just need to order more wire...

I have about 1600RMS off two amps in my 98 Maxima....

Its kinda wierd that your getting voltage drops after 15 minutes of driving. Sounds like there is something wrong with your charging system....

 

[Ali1 10+ year member]

$75 is not bad. I asked pepboys, they asked for $150 to do the big3. If you don't beleive me, call your local pepboy and ask anyway, just to see what they say.

 

[jacka 10+ year member]

yeah. i thought it was my ears at first, but i turned my car on and measured the batt at 13.8-13.9, went in, drove around until i noticed a difference, went out, then measured battery at 13.35-13.4

 

[Fast1one 10+ year member]

Have autozone check your whole charging system....IIRC its free, or very cheap....