Does anyone know what the output of a 94 accord ex's sotck alternator is? 2.2L 4 cyl engine. I'm looking at a 135amp alternator but dont know if that will be enough. I'm running 2 300w rms (600w peak) amps and a cda-7893 alpine head unit. thanks

 

600W RMS from a typical class a/b amp is in the neighbor hood of 60-80 amps...that's a wide approximation, but that's at maximum current draw.

The stock alternator is probably between 60 and 80, so the 135 would be a healthy upgrade....just make sure to check the idle output of the new alternator...typically they are rated by their peak output...somewhere around 4k rpm.

 

the stock alternator is 65A or 70A depending on the engine

 

The alternator upgrade doesnt make a huge difference unless you building a monster system 2000+ watts of power and still even then the difference is not great. Music is not a constant drain it hits peaks and valleys and never draw peak amps for more than milli secs

 

listen to this man- Upgrading your alt is somewhat pointless esp if your only runnin 600w thats nothin.. i had(old-old system) a 1000w ssytem runnin off a 35amp alt - & i had 1farad cap.. it worked fine.