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Speakers crackle when the engine is running
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<blockquote data-quote="Thor230" data-source="post: 8832000" data-attributes="member: 669168"><p>Your alternator makes AC power then is rectified then the DC is sent to your battery which acts as a filter however their is still a small ripple of ac in that DC power going into your amps and this is why you hear that sound with the car on . In home audio the ac is rectified then sent through a cascade of capacitors because different size capacitors filter different frequencies better then others so ideally they use several sizes and this cleans up the power so that the amp has better SQ, but in car audio we seem to have forgotten the importance of capacitors because we were told that they don't put out as much power as a battery therefore they are junk and this is unfortunately a concept born out of ignorance,</p><p></p><p>Long story short add a stiffing cap and that should do the trick or add one after the battery under the hoon then add a cap before each individual amp (if you have several amplifiers and batteries)</p></blockquote><p></p>
[QUOTE="Thor230, post: 8832000, member: 669168"] Your alternator makes AC power then is rectified then the DC is sent to your battery which acts as a filter however their is still a small ripple of ac in that DC power going into your amps and this is why you hear that sound with the car on . In home audio the ac is rectified then sent through a cascade of capacitors because different size capacitors filter different frequencies better then others so ideally they use several sizes and this cleans up the power so that the amp has better SQ, but in car audio we seem to have forgotten the importance of capacitors because we were told that they don't put out as much power as a battery therefore they are junk and this is unfortunately a concept born out of ignorance, Long story short add a stiffing cap and that should do the trick or add one after the battery under the hoon then add a cap before each individual amp (if you have several amplifiers and batteries) [/QUOTE]
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Speakers crackle when the engine is running
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