Got my HiFonics 1500.1D hooked up to my 2 x ATR12's and we have a major issue!
I can manage it with gain and my bass knob, but if I try to get anywhere near my amps
potential:

14.9.....13.6.....12.4.....10.1( )

I always turn my knob down as soon as I see that and my amp hasn't gone into protect mode,
but that doesn't mean I'm not at a risk of frying shit. I'll have the funds in about a week, so I
have some figuring to do and am hoping you guys can help me out a bit.

Step one, alternator ability. I drive an '09 Malibu and from what I can find it's a 120A. If someone
could confirm this that would be excellent. To my understanding, a 120A is right on the line for
handling a second battery. So the question is, which of these two options will put less stress on
my alternator?

1. 1800A Kinetic w/ isolator powering only the amp and as the amps only power source.
2. 800A Kinetic w/o isolator powering only the amp and as a second source of power for the amp.

I've come a long way because of this section, and am confident you will point me in the right direction.

Thanks in advance.

your alternator should have its amperage information on it. its easier than finding multiple sites and comparing information.

if it is 120amps its underpowered for what you are running. a power cell might help some but once you exceed alternator capacity there is only real 1 solution to fix power issues.

whats your current battery specs?

its no problem. its fairly simple to see if your alternator is too small. amps=watts/volts

if its already having such large voltage drops chances are upgrading your main battery and doing the big 3 will probably suffice.

if you already have a fair sized main battery than probably the smaller second one will be fine. the big 3 is going to fix a good amount of the voltage issues and the second battery will give you a buffer zone.

if that doesn't fix it then the alternator needs replaced next.

once you get over 1000rms it tends to get exponentially more expensive lol.

hopefully the power cell and big 3 will fix the issue. alternators get a bit expensive.

Redo big 3 in zero gauge, and power and grounds in 0 gauge if not already done. If your only adding one bat and your front one isnt dying run a 1800 and your stock together. For wire go to knukonceptz for crazy good strand count cheap i bought 100' from em last week.