"Scott M" wrote in message
...
KaeZoo wrote:

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 will stop you flattening your main one without
realising.


How?


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.

True.


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.

Anyone want to buy some magic beans I've got for sale?

What a load of rot. I can only think this stems from a belief that caps
are good for noise removal on power lines. Of course, a 1F lump would be
no use at all for that and amps have great big switched mode step up
PSUs inside them generating shedloads of electical noise which doesn't
seem to affect its operation.


My point was that a capacitor's purpose is NOT to assist the alternator.