wattage question

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flatulatta

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Joined: August 28, 2003

Location: United States

Posted: March 14, 2004 at 10:14 AM / IP Logged

ok i know most everyone knows the watt formula amperage x voltage = wattage.... i was wondering how accurate this was for more amps because i tryed it and it showed me about 1000watts for my amp... i was assuming this was with full voltage and the least resistance but how relable is it exactally?

DYohn

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Joined: April 22, 2003

Location: Arizona, United States

Posted: March 14, 2004 at 10:18 AM / IP Logged

Ohm's Law is, well, a LAW. It is 100% "reliable." What are you measuring, exactly? And what amp are you talking about?

flatulatta

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Joined: August 28, 2003

Location: United States

Posted: March 14, 2004 at 10:22 AM / IP Logged

well i was just messing around the other day and wanted to use it to see how many watts my amp put out and im running a 14.4v system and there is no rating for that anywhere..... i am running a jbl bp600.1..... it has 2 30a fuses in it

DYohn

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Joined: April 22, 2003

Location: Arizona, United States

Posted: March 14, 2004 at 10:34 AM / IP Logged

Well, at 14.4 V and 60 A (30 X 2) the math comes out to 864 watts. JBL under-rates their equipment so the listed specs are at a nominal 11 volts. The BP600.1 (a very nice amp, by the way) has a max current draw of 57 amps. So if you are really delivering 14.4 volts to it, it should be able to produce approximately (57 X 14.4) = 820 watts PEAK. This compares nicely with their rating on the amp of 600 watts into 2 ohms.

If you are really interested in measuring the exact output from your amp, it requires a little more expertise and equipment than the average person has. You can't do it with just a voltmenter, for example. But if you're serious I can direct you to a web site that will show you how to do it.

flatulatta

Silver - Posts: 356

Joined: August 28, 2003

Location: United States

Posted: March 14, 2004 at 10:37 AM / IP Logged

yea thatd be cool as long as it didnt cost about as much as the amp or speakers : )

customsuburb

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Joined: January 17, 2004

Location: United States

Posted: March 14, 2004 at 1:12 PM / IP Logged

So an old alpine amp like the 3513s which has a 10 amp fuse would average about 110 watts? Is that way off or am i about right?

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wattage question

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