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<blockquote data-quote="zako" data-source="post: 8040839" data-attributes="member: 629735">I personally recommend to always go over the subwoofers power handling, if you can afford it. A 200watt RMS amplifier means, if the rating is accurate, that you get audible distortion at the rated output. In fact, you can expect that such amplifier will behave well up to 150watt RMS output, and then the distortion will explode, reaching into audible range pretty fast. Just take a look at the picture, which is typical of what you get with a quality amplifier. The one on the picture gives 480watts RMS output with 4ohm load, but it&#039;s clearly starting running out of steam at 400watts. So if you need 200watts RMS, it&#039;s much better to have say 300-400watt amplifier.&nbsp; This way if you send 200watts to your subwoofer, those will be truly clean, low distortion watts. Of course, the downside is that this is more expensive, but what&#039;s cheap if you&#039;re building a good sounding audio system? Another thing is that amplifier ratings are often done at 14.4V, but in a lot of cars and installs the voltage seen by the amplifier will be lower, which means lower RMS output. This could happen due to flimsy factory wiring, battery, or poor amplifier power or ground wire.<img src="http://www.avtozvuk.com/az/2012/11/amps_gr/polk_1.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></blockquote>

[QUOTE="zako, post: 8040839, member: 629735"] I personally recommend to always go over the subwoofers power handling, if you can afford it. A 200watt RMS amplifier means, if the rating is accurate, that you get audible distortion at the rated output. In fact, you can expect that such amplifier will behave well up to 150watt RMS output, and then the distortion will explode, reaching into audible range pretty fast. Just take a look at the picture, which is typical of what you get with a quality amplifier. The one on the picture gives 480watts RMS output with 4ohm load, but it's clearly starting running out of steam at 400watts. So if you need 200watts RMS, it's much better to have say 300-400watt amplifier. This way if you send 200watts to your subwoofer, those will be truly clean, low distortion watts. Of course, the downside is that this is more expensive, but what's cheap if you're building a good sounding audio system? Another thing is that amplifier ratings are often done at 14.4V, but in a lot of cars and installs the voltage seen by the amplifier will be lower, which means lower RMS output. This could happen due to flimsy factory wiring, battery, or poor amplifier power or ground wire. [IMG]http://www.avtozvuk.com/az/2012/11/amps_gr/polk_1.jpg[/IMG] [/QUOTE]

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