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<blockquote data-quote="KrisM" data-source="post: 8680736" data-attributes="member: 677693">I have tested hundred&#039;s of amps over the years, replaced many, many components (EE-major) and I have tuned my ear well in the past 25 years of being an audio aficionado and I can tell you amplifiers do sound different.&nbsp; Whether we are speaking of solid state amps, tube amps, hybrid amps, etc, they all sound different.&nbsp; Do all amps have an extremely discernible sound difference?&nbsp; Yes, but not that most can hear or not without some type of testing equipment like an oscilloscope or an RTA.&nbsp; I have tested amps back to back of the exact same model and they had sonic differences between the two.Has class D come a long way and is almost completely unnoticeable now?&nbsp; Almost, but not quite.&nbsp; I still prefer class A and AB amplifiers.&nbsp; Is an amp that distorts bad?&nbsp; Maybe, is an amp that clips bad?&nbsp; Same thing, right?&nbsp; Not.&nbsp; When a class A or AB amp clips or distorts, the clipping is almost unheard and is not as pronounced as other types of amps.&nbsp; When class D amps clip, it&#039;s very noticeable.&nbsp; Does anyone even know the reason why class D amps run cooler?&nbsp; Let&#039;s see who knows the answer.&nbsp; Or I&#039;ll just tell you hear.&nbsp; Class D amps are not &quot;on&quot; all the time.&nbsp; The output devices in class D are only &quot;on&quot; when they have to be.&nbsp; Class A/AB are always &quot;on&quot;.&nbsp; Hence one of the reasons class A amps get warmer....</blockquote>

[QUOTE="KrisM, post: 8680736, member: 677693"] I have tested hundred's of amps over the years, replaced many, many components (EE-major) and I have tuned my ear well in the past 25 years of being an audio aficionado and I can tell you amplifiers do sound different. Whether we are speaking of solid state amps, tube amps, hybrid amps, etc, they all sound different. Do all amps have an extremely discernible sound difference? Yes, but not that most can hear or not without some type of testing equipment like an oscilloscope or an RTA. I have tested amps back to back of the exact same model and they had sonic differences between the two. Has class D come a long way and is almost completely unnoticeable now? Almost, but not quite. I still prefer class A and AB amplifiers. Is an amp that distorts bad? Maybe, is an amp that clips bad? Same thing, right? Not. When a class A or AB amp clips or distorts, the clipping is almost unheard and is not as pronounced as other types of amps. When class D amps clip, it's very noticeable. Does anyone even know the reason why class D amps run cooler? Let's see who knows the answer. Or I'll just tell you hear. Class D amps are not "on" all the time. The output devices in class D are only "on" when they have to be. Class A/AB are always "on". Hence one of the reasons class A amps get warmer.... [/QUOTE]

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