Neither a capacitor nor a second battery will do anything to help an
alternator keep up with current demand when the engine is running.

A second battery or a higher capacity battery is useful if you want to play
your system for long periods of time with the engine off.

The purpose of a capacitor is to improve the audio quality rather than to
reduce the strain on your electrical system. Judging from the feedback I've
seen, if they do have any effect on the sound quality, it's pretty subtle.

I wouldn't go right out and buy a new alternator just because you're
installing a high power system, however. Your stock alternator may be able
to supply all the current you need for normal use.

"Kim Inglar" wrote in message
...

"Scott M" wrote in message
...
Kim Inglar wrote:

Why do you use a capacitor? what is it good for? And do you realy have
nead
for it if you have large batteries?

Waste of money: they're a gimmic. They're no replacement for thicker
cabling or a bigger battery. And if you really find you need a bigger
battery then say goodbye to your hearing - it's too loud already.

Hehe, it´s never too loud. I have just bought 2 RF 1501 (will be linked
with the powerlink cable) and 2 RF 1051. I only have a alternator that
deliveres 70A and one battery on 75A. What should I do then?

Kim