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Installing a sub in a car Answered

I had the idea to put a sub in my car. i bought everything (sub+amp). But first I tried to wired it in my car, my friend told me to look at my alternator to see if he could take the load. My amp and subs are 600W rms.

So I,ve look at the specification of my car....my alternator is an 80 amp. Its the only thing about alternator I saw in a lot of diffent specs.\


80 amp alternator
600W rms amp
600W rms sub

Could my alternator could take the load????


5 Replies

johnybody (author)2010-08-11

Thanks everyone! Today ive installed it, and as STEVEASROUK said, this is way too much bass. Also, everything as been okay about the alternator. Then my friend came up and we tried to change the fuse ive put at the batterie to power the amp. First, ive put a fuse of 30 amp. then we put a 15 amp, a 10 amp, and finally a 7.5 amp. How this could be possible!!!?!?!?! Its clearly marked on the box of the amp and on internet that its a 600W rms... And as NACHOMAMA says : 7.5 amp X 12 volts = 90W

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NachoMahma (author)2010-08-10

.  Watts = Volts * Amps
.  Alternator Watts = 12 * 80 = 960
.  Depending on year/make/model/accessories of your car, that may not be enough to drive your amp and the rest of the car.
.  If amp and sub are using 600W each, you are already in the hole.

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With that kind of power you'd probably never be running it anywhere near capacity, unless you were staging a party... If the amps taking up 600W to run the sub then that's probably OK, though it might start taking the battery down at full bore with the lights on...

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steveastrouk (author)2010-08-11

Not sure about the alternator, but what about your ears ? I can't conceive of sitting in a small closed box with 600W RMS sound in it ?

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