Ohm Meter

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Frequently Asked Questions...

How can I check the TRUE wattage on an amp?

I don't have an amp/ohms meter, but I do know the voltage when the alternator is running and the amp has a 30 watt fuse.
I don't believe the amp is putting out the claimed 600 watts.

Best Answer...


Well first its a 30 amp fuse not 30 watts... but ts ok.

30 amps x 14.4 volts = 432 watts.... after loses your probably looking at anywhere between 375 and 400 (thats also if your battery is at 14.4 volts which I doubt so this is more realistic)

30 amps x 13 volts = 390 watts after loses probably around the 350 range

Good luck