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General Car Audio
Capacitors, their NOT what some people claim..
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<blockquote data-quote="gstokes" data-source="post: 8284487" data-attributes="member: 660947"><p>let's watch the video again because it is very revealing, one of the first things i noticed was the use of a 1F cap on a 2500W amplifier, at 4~ the amplifier lost 10W of power 1499 &gt; 1489 (-10), if the capacitor was indeed functioning correctly then that would indicate a 1F is indeed too small for a 2500W amplifier and it would also indicate that the use of a capacitor that was too small for the amplifier would actually cause a decrease in power. At 2~ with the 1F cap the rms power decreased from 2059 &gt; 2024 (-35), at 1~ the rms power decreased from 2366 &gt; 2358 (-8), that would confirm that no capacitor is better than the wrong capacitor.</p><p></p><p>Adding the 100F cap provided some very different results, at 4~ the power increased from 1499</p><p></p><p>If that's what i needed to gain 32 watts at 4~ and 149 watts at 2~ then i would have to say it is not good investment, at a certain dollar figure you have to question your logic and ask yourself why a bigger amplifier would not be better choice. I would like to see a comparison using the 1F cap on your average 750 - 1000W amplifier, let's see a comparison using the right size capacitor for the application and not using one that is over 2x too small for the intended use and using another that is 4x too big for the application. This would make it easier to determine if a 2.5F cap which is right size for a 2500w amplifier would have provided the same or similar results. Apples to apples and oranges to oranges as they say..</p><p></p><p>The test also made something else very evident, the voltage drop from the source (alternator 14.01V) to the load (amplifier 13.07V), keep in mind there was 0 gauge cables from the engine to the amplifier and it still encountered a .94V voltage drop, almost 1V at 4~ but as the load impedance decreased the voltage drop increased, 11.84v at 2~ and 10.83v at 1~. If that doesn't convince you that a secondary battery should be located close to the amplifier then i don't know what does but just realizing even 0 gauge cables and a 2~ load is enough to cause a 2.17V drop in load voltage concerns me because i am using 4 gauge so the voltage drop is even greater.</p><p></p><p>Nevertheless, very revealing test..</p></blockquote><p></p>
[QUOTE="gstokes, post: 8284487, member: 660947"] let's watch the video again because it is very revealing, one of the first things i noticed was the use of a 1F cap on a 2500W amplifier, at 4~ the amplifier lost 10W of power 1499 > 1489 (-10), if the capacitor was indeed functioning correctly then that would indicate a 1F is indeed too small for a 2500W amplifier and it would also indicate that the use of a capacitor that was too small for the amplifier would actually cause a decrease in power. At 2~ with the 1F cap the rms power decreased from 2059 > 2024 (-35), at 1~ the rms power decreased from 2366 > 2358 (-8), that would confirm that no capacitor is better than the wrong capacitor. Adding the 100F cap provided some very different results, at 4~ the power increased from 1499 If that's what i needed to gain 32 watts at 4~ and 149 watts at 2~ then i would have to say it is not good investment, at a certain dollar figure you have to question your logic and ask yourself why a bigger amplifier would not be better choice. I would like to see a comparison using the 1F cap on your average 750 - 1000W amplifier, let's see a comparison using the right size capacitor for the application and not using one that is over 2x too small for the intended use and using another that is 4x too big for the application. This would make it easier to determine if a 2.5F cap which is right size for a 2500w amplifier would have provided the same or similar results. Apples to apples and oranges to oranges as they say.. The test also made something else very evident, the voltage drop from the source (alternator 14.01V) to the load (amplifier 13.07V), keep in mind there was 0 gauge cables from the engine to the amplifier and it still encountered a .94V voltage drop, almost 1V at 4~ but as the load impedance decreased the voltage drop increased, 11.84v at 2~ and 10.83v at 1~. If that doesn't convince you that a secondary battery should be located close to the amplifier then i don't know what does but just realizing even 0 gauge cables and a 2~ load is enough to cause a 2.17V drop in load voltage concerns me because i am using 4 gauge so the voltage drop is even greater. Nevertheless, very revealing test.. [/QUOTE]
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