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Message: <blockquote data-quote="audiolife" data-source="post: 2272909" data-attributes="member: 541383">a 200 amp alt isn't a 200 amp alt all the time regardless of the load on it (it has to spin @ xxxx rpm to do that and its alot less than 200 amps at idle) if you listen to music either alt (stock or hi output) will use the battery as a buffer regardless. under normal conditions a 80-100 amp alt will have time to  adequately charge up 2 batteries if you aren't constantly beating on your system. not only that but i think i would rather have that extra reserve of the battery for when i wanted to blast my system (which is usually done while parked or driving really slow when your super alt isn't quite so super). also when you add a battery to the back with the right sized wire/wires from the front battery all of the sudden something else happens......more than likely you will have less voltage drop AT the amplifier which does what with our "buffer"? (which it is more than a buffer and acts more than a buffer when needed i would fully call it usable reserve lol)i wont argue that a high output alt wont make you "louder" (by a few tenths usually anyway) but in situations where you beat on your system to show it off or to see what it can do (you probably aren't going to do that in all likely hood at 50 miles an hour as i dont know maybe it would take away from some of the effect of it lol) an extra battery can defiantly stop your amp from going into protection or worse. some of your high output alts actually put out less power at idle than a factory alt...and if it puts out a crap load of current at really low rpm its eating up hp in use and it will in all probability have some durability issues in its own right.i have had less problems with modest systems that simply had an extra battery than i have had with high output alts that were professionally installed also imo its sort of a waste to have a HO alt without the extra battery...after all now you would have the charging capacity in which to work with.heck in 1990-92 ppi told me to get an extra battery after they fixxed my 2200 AM the second time lol i went one step beyond that and got a dual 120 amp output alt and a deep cycle battery. at the time i had 2 4200's a 2150 and a 2200 in that car...worked great for a week at a time  until i did the upgrade....</blockquote>

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