Sounds like he's full of poo-poo dust.
Number one, a cap does not save a battery, alternator, or a damsel in distress. A cap is used purely as an improvement for sound quality. Stop listening to the car audio witch doctors.
And you cannot wire a cap "to" a particular device, unless you're going to put some large diodes in for some crazy reason. Your electrical system is all interconnected, the current from a cap can flow anywhere. That's one reason for placing it as close to the amp as possible.
For the people out there who still think a cap is like a battery, I make this challenge for you:
Remove the fuse at your battery and power up the system. Now tell me how long you are able to power your amp off your cap :)
I have been a mobile electronics installer for 25 years, 15 of which in my own retail store in Los Angeles. I have had installations featured in "Installation News" magazine and have won many awards in autosound competitions.
· 1 decade ago