Amp Voltage Low. Need help.

[Crownvicon28s 10+ year member]

My voltage at my back battery is 13.8 with the car on and its the same at the amp, but when the bass hits the voltage at the back battery drops to around 13.2 but drops to around 12.4 at the amp. Is this normal? If not how do I fix it?

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[Crownvicon28s 10+ year member]

bump

 

[chase007 10+ year member]

Bigger ALT....OR more batterys......I suggest BIGGER ALT

 

[Crownvicon28s 10+ year member]

Bigger ALT....OR more batterys......I suggest BIGGER ALT

My voltage at the batteries is fine. I was wondering why is it so much lower at the amp than at the batteries and is this normal?

 

[chase007 10+ year member]

My voltage at the batteries is fine. I was wondering why is it so much lower at the amp than at the batteries and is this normal?

What kind of Wiring are you using??? How far is your ground from the amp? Check how much power you're ground is getting

 

[Crownvicon28s 10+ year member]

What kind of Wiring are you using??? How far is your ground from the amp? Check how much power you're ground is getting

Don't know the brand just some 0 gauge I bought from a shop nearby. My ground is around 3ft from my amp. How do I check how much power my ground is getting?

 

[rgplayer 10+ year member]

Dmm

 

[chase007 10+ year member]

Don't know the brand just some 0 gauge I bought from a shop nearby. My ground is around 3ft from my amp. How do I check how much power my ground is getting?

Put lead on the DMM on the pos on the last battery and then touch the negative ground on your car where the ground is coming from. Ask some one else who knows alittle more about all this stuff they can help you better then I can.

 

[Crownvicon28s 10+ year member]

Dmm

I know that, but do I put the leads on the negative terminals only? I don't know how to measure power from only the ground. Could you tell me?

 

[Crownvicon28s 10+ year member]

bump

 

[chase007 10+ year member]

I am helping you in you're other thread. I would suggest you get you're other battery first then install it then see if that fixed your problem. It most likely will.

 

[Crownvicon28s 10+ year member]

That thread is about which battery option I should go with. This thread is about my voltage at the amp being lower than at the batteries. My current batteries stay around 13.2, 13.3 when the bass hits, but my voltage at the amp is around 12.4. Are you saying that upgrading batteries will solve this problem? Not trying to be an ***, but other responses are greatly appreciated.

 

[chase007 10+ year member]

That thread is about which battery option I should go with. This thread is about my voltage at the amp being lower than at the batteries. My current batteries stay around 13.2' date=' 13.3 when the bass hits, but my voltage at the amp is around 12.4. Are you saying that upgrading batteries will solve this problem? Not trying to be an ***, but other responses are greatly appreciated.[/quote']
Sorry I am just trying to see whats the problem... Please remove the + and - leads from your amp VERY CAREFULLY and check the voltages with the amp disconnected.... watch your self don't **** any thing up...If they are fine then its just your amp drawing in alittle extra juice, or a bad ground I am not sure.

 

[rgplayer 10+ year member]

You may need a digital ammeter to test ground power drain.

 

[Crownvicon28s 10+ year member]

You may need a digital ammeter to test ground power drain.

I have one but how do I do this?