#1
Ok, I got an amp and a 2x12 in my car a long while back and then a few weeks later a started having trouble with my car not starting. we figured out that the amp was pulling a little bit more juice then the alternator could replace. the solution: turn of my radio for a little while every now and then.

but of course that kinda sucks, so I bought a little 20 amp on/off toggle so I can mount that somewhere in the car so I can just turn off my amp instead of the whole damn radio.


now my question: which wire should i put the switch in? should I put it in the hot wire coming from the battery to the amp, or should I put it in the remote wire coming from the radio to the amp? or should I put it in another wire completely?

if I'm putting it in the power wire should I move my inline fuse down past the switch so it's between the switch and the amp, or should I leave it in front of the switch?

thanks
#2
First off, thats not the solution. You sound like the atypical, too big of an amp for what the car can handle. Solutions? If your alternator isnt messed up already, new battery? New alternator? furthermore, who installed the wiring? What is the wattage of the amp? What guage power wire was used??? If your stuff is still kosher, I would think a 1 farad cap would prolly help a lot.
Amps:
Crate V3112
Mesa Mk IVB

Guitars:
Ibanez SZ320
BC Rich Mockingbird Special X
Michael Kelly Patriot Custom

Effects:
Too Many to list.
#3
Quote by bob vila
First off, thats not the solution. You sound like the atypical, too big of an amp for what the car can handle. Solutions? If your alternator isnt messed up already, new battery? New alternator? furthermore, who installed the wiring? What is the wattage of the amp? What guage power wire was used??? If your stuff is still kosher, I would think a 1 farad cap would prolly help a lot.


well, it had been a while (can't remember) after I got the amp before it started having trouble starting so I didn't think right away about it being the amp. I took it to autozone and they checked the battery, said it was good, and checked the alternator, and said it was getting bad so I got a new one. then it went about a month before I had trouble again. I asked a guy I kinda know that works at another car parts store if it could be my amp and he looked at the alternator and the amp and did some quick math in his head and said yea, that was the problem.


I didn't know anything about it at the time, I had a friend who kinda knows about it help me pick out the amp and we wired most of it, and then for the stuff we weren't sure about we left like it was and one of his friends did all that. and now that I know all that was I know he did that right too, and everything looks clean.

it's a 1200 watt amp, I'm not sure on the power wire gauge, but it looks like it's around 5/16 of an inch insulation and all. we got the stuff that was recommended.

i don't know how much the alternator puts out or anything :/ it's a 98 ford escort, i looked on google to see if i could find some specs for the alternators in those but I'm having trouble finding one.

I don't have the money to shell out on anything at the moment, so I figured I'd do this for a temporary fix. but what's a 1 farad cap?

edit: i think the first one or maybe the second one on this page is the alternator I got http://www.autozone.com/addVehicleId,2398001/initialAction,partTypeResultSet/initialN,16400086/shopping/vehicleSelected.htm
Last edited by The4thHorsemen at Mar 3, 2009,
#4
for the switch to turn the amp on and off without the radio off put it on the remote wire going from the cd player to the amp...that eliminated the hassle of attaching it to the huge power wire or moving the fuse

2nd off for the stealing power thing just get a capacitor for it. If its installed right it will take constant less energy instead of huge amounts so you wont kill the battery or hurt the alternator really..and some have auto shut offs for when its full power or if it cant get enough power


-stoner
#5
Quote by stoner179
for the switch to turn the amp on and off without the radio off put it on the remote wire going from the cd player to the amp...that eliminated the hassle of attaching it to the huge power wire or moving the fuse

2nd off for the stealing power thing just get a capacitor for it. If its installed right it will take constant less energy instead of huge amounts so you wont kill the battery or hurt the alternator really..and some have auto shut offs for when its full power or if it cant get enough power


-stoner



ok, thanks man. I was thinking the remote wire would work and would be easiest, but wasn't sure if that would be bad or not.

and I'll look into getting a capacitor
#6
ok, heres the thing. 1200W is a lot of power. You should be at 4AWG minimum. That should be thicker than quarter inch. from the length from the battery to the amp, i would go 2AWG. secondly, stock alternators werent ment to power big amps. you can buy aftermarker alternators that will have a higher amp output. 1200W? What i would do is, buy a second battery and a one way relay, this way, the alternator still charges the battery for the amp, but if the starter battery voltage fluctuates it wont dissipate the amp battery. To do everything right, find out what the RMS wattage is for your amp setup, what is the impedance of your box? then you can find out what your average requirement is. anything over 500W and a 2nd battery installed properly is a much better choice than a bigger alternator or a capacitor, although a bigger alternator never hurts.
Amps:
Crate V3112
Mesa Mk IVB

Guitars:
Ibanez SZ320
BC Rich Mockingbird Special X
Michael Kelly Patriot Custom

Effects:
Too Many to list.