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is there a general guide line of how big an alternator needs to support howmanywatts
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<blockquote data-quote="akillj" data-source="post: 8309910" data-attributes="member: 644272"><p>What is your source on the "music over time is about 15% the power of a sine wave?"</p><p></p><p>What if i'm listening to Decaf music, where bass lines can be constant through the entire song? If Decaf stuff and a sine wave are recorded at the same level (say, -6 db), the bass amp would see, and produce similar results to the sine waves. I don't see how that would be anywhere near "15%." Could you explain further on why amp efficiency is irrelevant / "********?" It takes an amp X power to create Y power. There's nothing more really to it. I don't see how if one wanted to calculate max load, that they wouldn't consider efficiency a valuable factor.</p><p></p><p>I'm not trying to be a jerk here, i'm here trying to learn as much as the next guy. I would agree that buying more is always better. Even more of a reason to get a rough calculation (like I did above^). It's not about getting as small of an alternator as you can. In fact, quite the opposite. If you take my example into a real-world scenario, you would need no more than 532 amps. That would be a MAXIMUM possible load (For amps + car running, anything else would be too small to even bother calculating in. I simply calculated the two biggest draws on the electrical). You would never see more than that. The rest would just be wiggle room.</p><p></p><p>In most setups here people running big amps / subs, the amps themselves are obviously going to be the top draw on the electrical. Next up would either be the car itself, or the mid/highs amps if they were powerful enough. If you can satisfy the amps than really anything below that (like the small amps for tweets or the car itself) isn't much to worry about imo.</p></blockquote><p></p>
[QUOTE="akillj, post: 8309910, member: 644272"] What is your source on the "music over time is about 15% the power of a sine wave?" What if i'm listening to Decaf music, where bass lines can be constant through the entire song? If Decaf stuff and a sine wave are recorded at the same level (say, -6 db), the bass amp would see, and produce similar results to the sine waves. I don't see how that would be anywhere near "15%." Could you explain further on why amp efficiency is irrelevant / "********?" It takes an amp X power to create Y power. There's nothing more really to it. I don't see how if one wanted to calculate max load, that they wouldn't consider efficiency a valuable factor. I'm not trying to be a jerk here, i'm here trying to learn as much as the next guy. I would agree that buying more is always better. Even more of a reason to get a rough calculation (like I did above^). It's not about getting as small of an alternator as you can. In fact, quite the opposite. If you take my example into a real-world scenario, you would need no more than 532 amps. That would be a MAXIMUM possible load (For amps + car running, anything else would be too small to even bother calculating in. I simply calculated the two biggest draws on the electrical). You would never see more than that. The rest would just be wiggle room. In most setups here people running big amps / subs, the amps themselves are obviously going to be the top draw on the electrical. Next up would either be the car itself, or the mid/highs amps if they were powerful enough. If you can satisfy the amps than really anything below that (like the small amps for tweets or the car itself) isn't much to worry about imo. [/QUOTE]
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is there a general guide line of how big an alternator needs to support howmanywatts
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