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Audio and Video Talk
General Discussion
Motor car Amps vs. Mains Amps
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<blockquote data-quote="ingenieus" data-source="post: 970064" data-attributes="member: 13716"><p>Interesting idea, nothing wrong with your thinking. It will work fine but there are some things to consider.</p><p></p><p>A normal car battery might not last long if you are going to play tunes until it runs out of juice. You really should have a deep cycle (caravan) battery and they are not cheap. A fancy trickle charger that will turn itself on and off would be good as well.</p><p></p><p>This rig will not have any mains noise but there is more to it. From a 12V battery you can only get about 5W RMS power. That is why the radio in granddad's car couldn't play very loud. TO get more watts, a DC to DC converter aka switching power supply is needed. This is a complicated subject, but in short the DC drives a high frequency oscillator. The AC produced can be stepped up with a transformer, which is then rectified back to DC again. To make things <s>worse</s> more complicated, most high power car amps are Class D. Some audiophiles go green at the very thought of these sort of things. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite27" alt=":giggle:" title="Giggle :giggle:" loading="lazy" data-shortname=":giggle:" /></p></blockquote><p></p>
[QUOTE="ingenieus, post: 970064, member: 13716"] Interesting idea, nothing wrong with your thinking. It will work fine but there are some things to consider. A normal car battery might not last long if you are going to play tunes until it runs out of juice. You really should have a deep cycle (caravan) battery and they are not cheap. A fancy trickle charger that will turn itself on and off would be good as well. This rig will not have any mains noise but there is more to it. From a 12V battery you can only get about 5W RMS power. That is why the radio in granddad's car couldn't play very loud. TO get more watts, a DC to DC converter aka switching power supply is needed. This is a complicated subject, but in short the DC drives a high frequency oscillator. The AC produced can be stepped up with a transformer, which is then rectified back to DC again. To make things [s]worse[/s] more complicated, most high power car amps are Class D. Some audiophiles go green at the very thought of these sort of things. :giggle: [/QUOTE]
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Audio and Video Talk
General Discussion
Motor car Amps vs. Mains Amps
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