Jump to content

2006 GT - Stock Alternator Headroom?

112 dB

Recommended Posts

Long story short - I used to be an installer and I had a nice Sound Quality competition system in my old car. After 13 years I finally bought a new car two weeks ago (2006 Legacy GT Sedan). Love the car, hate the stereo. I've been out of the install business for about 8 years now so I'm at a bit of a loss when it comes to advancements and events in that arena.


My question is - how much headroom does the Stock Alternator have - i.e. under normal operating circumstances how much current can you expect to use for a sound system before you start to strain the stock alternator?


I'm planning on a small system - either 2 RF Punch 45 (new 25 to life series) or finding an old 60ix to compliment a 40i I've had in mothballs since I bought it. Either way, the system should have about 400 w and draw about 28 amps. (400w/14.4v)


Of course, music is dynamic and the current draw will also vary, so it's a little bit harder to tell how the amps will affect the car's electrical system. I plan to use at least 1 farad of capacitance as part of the install.


Does anyone have experience or advice on how much strain you can put on the stock alternator? Sorry for the long post - it's my first one, I signed up today and am really excited by the expertise and courtesy I see in the other posts.

Link to comment
Share on other sites

I have 850W in mine...No problems at all, but I'm not a terribly abusive listener. I wouldn't go over 1 kW total RMS power under any circumstances with the stock alternator.




Stock Alternator

2AWG main power wire

Amp ground to the side wall of the spare tire well

Link to comment
Share on other sites


This topic is now archived and is closed to further replies.

  • Create New...

Important Information

Terms of Use