Reply to thread

Message: <blockquote data-quote="Old_Slapper" data-source="post: 8924791" data-attributes="member: 690458">As you know, alternators are measured in amperage (aka amps).  To figure out how many amps you need, add wattage of your amplifiers.  Then you take the total wattage and divide it by 10.  If your amplifiers have a combined wattage of 4000 watts, then your highest amperage demand will be 400 amps.  HOWEVER...  How much of that 4000 watts will you actually use?  It is pretty rare that you will max your amplifiers out.  In your post, you only listed a 1200 watts subwoofer amplifier.  I'm sure you will plan on adding another amp down the road.  If you just plan on having just than one amplifier, your stock alternator should be fine.  I would upgrade all the power wires under your hood (aka the Big-3) and upgrade your factory main battery to a really good one.</blockquote>

Top