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Car Audio Discussion
General Car Audio
is there a general guide line of how big an alternator needs to support howmanywatts
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<blockquote data-quote="hispls" data-source="post: 8310191" data-attributes="member: 614752"><p>The Zed Audio manual. It's quite a good read.</p><p></p><p>Then you are actually listening to a sine wave. Enjoy. That's not my definition of music. Most folks' definition of music would be an average of stuff you'd hear on the radio.</p><p></p><p></p><p>Because the "efficiency" that manufacturers brag about is a ******** number and will only be seen at 4 ohms or so and just below clipping. It is incredibly unlikely you'll get anything like advertised efficiency real-world (even if your definition of music is just a test tone).</p><p></p><p></p><p>OK, so now buy a 500A alternator or whatever you just guessed at. First of all, that doesn't exist, second that's still probably under-estimating what your maximum draw could potentially be.... or possibly over-estimating what OP will actually need for his daily use. Pretty much 250-300A is about the biggest real world hot current you'll get out of an alternator, so what's the point of counting how many angels could dance on the head of a pin beyond that?</p><p></p><p></p><p>I can almost guarantee that 750A fusing won't in a million years protect that amp from burning up if something goes wrong. Also, most manufacturers have learned that "clever" people on audio forums try to guess output based on the fuse rating and they over-rate that as well. I can't remember the last time I heard of someone opening fuses on the popular Korean amps.... which tells me they're over-fusing. Generally speaking if it's protecting your amp you'll open a fuse here and there when pushing hard.</p></blockquote><p></p>
[QUOTE="hispls, post: 8310191, member: 614752"] The Zed Audio manual. It's quite a good read. Then you are actually listening to a sine wave. Enjoy. That's not my definition of music. Most folks' definition of music would be an average of stuff you'd hear on the radio. Because the "efficiency" that manufacturers brag about is a ******** number and will only be seen at 4 ohms or so and just below clipping. It is incredibly unlikely you'll get anything like advertised efficiency real-world (even if your definition of music is just a test tone). OK, so now buy a 500A alternator or whatever you just guessed at. First of all, that doesn't exist, second that's still probably under-estimating what your maximum draw could potentially be.... or possibly over-estimating what OP will actually need for his daily use. Pretty much 250-300A is about the biggest real world hot current you'll get out of an alternator, so what's the point of counting how many angels could dance on the head of a pin beyond that? I can almost guarantee that 750A fusing won't in a million years protect that amp from burning up if something goes wrong. Also, most manufacturers have learned that "clever" people on audio forums try to guess output based on the fuse rating and they over-rate that as well. I can't remember the last time I heard of someone opening fuses on the popular Korean amps.... which tells me they're over-fusing. Generally speaking if it's protecting your amp you'll open a fuse here and there when pushing hard. [/QUOTE]
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is there a general guide line of how big an alternator needs to support howmanywatts
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