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ANDYS87 · 05-21-2008, 04:53 AM

Just to beat a dead horse.....here's Richard Clark's reply:

Quote:
Originally Posted by ANDYS87
Hi Richard,

I've written you before. Was a huge fan of you and your "sound system" GN back in the good old days. Reasons why I went into electrical engineering.... Anyways, this guy on a Mustang forum(american muscle.com) is throwing out basic highschool DC formulas and trying to "school" me. There's always an ass**** out there! Anyways, he says that capacitors for car audio purposes are useless. You are the stiffening capacitor "GOD" so I thought I'd get your take on it. I will paste what he said below:

.................................................. ......................
Actually if you are using the hose analogy, the amperage would be the pressure and voltage would be the diameter of the hose, not the pressure.
The reason for the huge cables is that a low voltage (DC) signal requires a lot of amperage to do the same amount of work.

Ohms law: P=IV Power = Current x voltage

say you want 500 watts for your car stereo (DC.) You need 35.7 amps on that 14 volts to get the power you need. 14volts x 35.7Amps = 500 watts

now say you need the same 500 watts in your house (AC.) You only need 4.16 amps with the 120 volts. 120volts x 4.16Amps = 500 watts

Also capacitors for car audio are a waste of money. If you put a capacitor on an already taxed DC electrical system, you are not helping any. In DC analysis capacitors are treated as shorts anyway.
__________________................................ ...........

Ok, he thinks amperage is electrical "pressure"...back to highschool for him! What is your take on his capacitor arguement?

Thanks for your time.

Andy

he's obviously not too bright or he failed to pay attention in his circuits class-------i really hate arguing with idiots on the internet-------it really gets old after about two paragraphs.............RRC
__________________
Richard Clark at AMI

05-21-2008, 04:53 AM	#21 (permalink)
ANDYS87 Member Join Date: Dec 2006 Posts: 97	Just to beat a dead horse.....here's Richard Clark's reply: Quote: Originally Posted by ANDYS87 Hi Richard, I've written you before. Was a huge fan of you and your "sound system" GN back in the good old days. Reasons why I went into electrical engineering.... Anyways, this guy on a Mustang forum(american muscle.com) is throwing out basic highschool DC formulas and trying to "school" me. There's always an ass**** out there! Anyways, he says that capacitors for car audio purposes are useless. You are the stiffening capacitor "GOD" so I thought I'd get your take on it. I will paste what he said below: .................................................. ...................... Actually if you are using the hose analogy, the amperage would be the pressure and voltage would be the diameter of the hose, not the pressure. The reason for the huge cables is that a low voltage (DC) signal requires a lot of amperage to do the same amount of work. Ohms law: P=IV Power = Current x voltage say you want 500 watts for your car stereo (DC.) You need 35.7 amps on that 14 volts to get the power you need. 14volts x 35.7Amps = 500 watts now say you need the same 500 watts in your house (AC.) You only need 4.16 amps with the 120 volts. 120volts x 4.16Amps = 500 watts Also capacitors for car audio are a waste of money. If you put a capacitor on an already taxed DC electrical system, you are not helping any. In DC analysis capacitors are treated as shorts anyway. __________________................................ ........... Ok, he thinks amperage is electrical "pressure"...back to highschool for him! What is your take on his capacitor arguement? Thanks for your time. Andy he's obviously not too bright or he failed to pay attention in his circuits class-------i really hate arguing with idiots on the internet-------it really gets old after about two paragraphs.............RRC __________________ Richard Clark at AMI