Battery

[JimJ 5,000+ posts]

If anything, on the higher notes you'd be drawing less current.

Your impedance rise is going to spike around most high bass notes.

 

[qtipextra 5,000+ posts]

no amount of 12.5V batteries are gonna help you if your dropping to 12.8. the battery does not operate up in that realm. the only device pumping out anything higher than around 12.5v in a normal car environment is the alternator.
buy a second, or a bigger main alternator. 200A+

if you dont, your still gonna drop down below 14.4v no matter what... unless u run a 24v system //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif but your not..

Thats kinda what I was thinking, but gosh darn it. I just got this 160 amp alt for christmas, and I cant afford to buy a new 200+ amp alt. Theres no way I can run 2. And I dont want to spend more money on my car then absolutley nessisary, because I plan on getting a new car this year.

 

[qtipextra 5,000+ posts]

If anything, on the higher notes you'd be drawing less current.
Your impedance rise is going to spike around most high bass notes.

So thats why voltage drops are higher at higher notes, because of the impedence rise? But that doesnt make sence, more resistence=less power, not more resistence= more power.

 

[JimJ 5,000+ posts]

If you're getting significant dimming with your current setup, frankly, there's something wrong.

I'm running about 1.7kW with a 135A alt and get no dimming whatsoever, @ 14.7VDC...

 

[zachzchw 5,000+ posts]

Qtip, think it might be something to do with your amp? (The amp that just died) Or have you always had the dimming problem?

 

[qtipextra 5,000+ posts]

I am pretty sure its just the amp.