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Car Audio Equipment
Amplifiers
Thought and opinions on compact 2 channel amplifiers
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<blockquote data-quote="zako" data-source="post: 8120127" data-attributes="member: 629735"><p>Ignore the THD spec. A lot of the time THD is not measured consistently in the same way, so it's like comparing apples to oranges. A more useful measure of THD is to see a whole THD graph mapping power to THD. There was one for the four channel P900.4 and it looked very good to me. These amps have very low THD. Class D amplifiers run more efficiently, so they don't need huge heatsinks to dissipate heat. I had the 4-channel P900.4. With all channels running at 2ohms, it should be capable of 900watt RMS output. The length of the amplifier was about 10 inches. The 2-channel PPI P600.2 was not bench tested but the 4-channel was:</p><p></p><p><a href="http://www.pasmag.com/car-audio/test-reports/1805-test-report-precision-power-p9004-amplifier-" target="_blank">http://www.pasmag.com/car-audio/test-reports/1805-test-report-precision-power-p9004-amplifier-</a></p><p></p><p>I saw also a bench test of 2-channel Polk Audio D2000.2 and 4ch Polk D4000.4. It's a related design, but the components inside are not identical to PPI amps. It looked good too.</p></blockquote><p></p>
[QUOTE="zako, post: 8120127, member: 629735"] Ignore the THD spec. A lot of the time THD is not measured consistently in the same way, so it's like comparing apples to oranges. A more useful measure of THD is to see a whole THD graph mapping power to THD. There was one for the four channel P900.4 and it looked very good to me. These amps have very low THD. Class D amplifiers run more efficiently, so they don't need huge heatsinks to dissipate heat. I had the 4-channel P900.4. With all channels running at 2ohms, it should be capable of 900watt RMS output. The length of the amplifier was about 10 inches. The 2-channel PPI P600.2 was not bench tested but the 4-channel was: [URL="http://www.pasmag.com/car-audio/test-reports/1805-test-report-precision-power-p9004-amplifier-"]http://www.pasmag.com/car-audio/test-reports/1805-test-report-precision-power-p9004-amplifier-[/URL] I saw also a bench test of 2-channel Polk Audio D2000.2 and 4ch Polk D4000.4. It's a related design, but the components inside are not identical to PPI amps. It looked good too. [/QUOTE]
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Thought and opinions on compact 2 channel amplifiers
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