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<blockquote data-quote="squeak9798" data-source="post: 1529508" data-attributes="member: 555320">Any amplifier classes are allowed.&nbsp; A vs A/B.&nbsp; A/B vs D.&nbsp; A/B vs A/B.&nbsp; Read through the rules I posted earlier.&nbsp; He does not state that the amplifiers being compared must be of the same topology.&nbsp; Any amplifier is fair game as long as it meets the rest of the criteria (noise, distortion, etc)The point was to distinguish what does and does not have an audible affect of the &quot;sound quality&quot; of an amplifier.&nbsp; This includes amplifier topology.To quote werewolf, the purpose of the amplifier challenge is to establish a hypothesis that;The standard amplifier tests of power, gain, frequency response, noise &amp;amp; distortion completely characterize an amplifier&#039;s sound. Therefore, any two amplifiers that measure the same, will sound the same.So far no one has disproved this hypothesis.Quote take from;<a href="http://forum.elitecaraudio.com/showthread.php?threadid=123226&amp;amp;pagenumber=3" target="_blank">http://forum.elitecaraudio.com/showthread.php?threadid=123226&amp;amp;pagenumber=3</a> - great thread to read on the subject.You are more than welcome to find a full range Class D amplifier to put up against your favorite class A/B or pure class A in order to disprove the above hypothesis.&nbsp; But thus far, out of thousands of tests, no one has.</blockquote>

[QUOTE="squeak9798, post: 1529508, member: 555320"] Any amplifier classes are allowed. A vs A/B. A/B vs D. A/B vs A/B. Read through the rules I posted earlier. He does not state that the amplifiers being compared must be of the same topology. Any amplifier is fair game as long as it meets the rest of the criteria (noise, distortion, etc) The point was to distinguish what does and does not have an audible affect of the "sound quality" of an amplifier. This includes amplifier topology. To quote werewolf, the purpose of the amplifier challenge is to establish a hypothesis that; The standard amplifier tests of power, gain, frequency response, noise & distortion completely characterize an amplifier's sound. Therefore, any two amplifiers that measure the same, will sound the same. So far no one has disproved this hypothesis. Quote take from; [URL="http://forum.elitecaraudio.com/showthread.php?threadid=123226&pagenumber=3"]http://forum.elitecaraudio.com/showthread.php?threadid=123226&pagenumber=3[/URL] - great thread to read on the subject. You are more than welcome to find a full range Class D amplifier to put up against your favorite class A/B or pure class A in order to disprove the above hypothesis. But thus far, out of thousands of tests, no one has. [/QUOTE]

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