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<blockquote data-quote="dcsoundguy" data-source="post: 2934" data-attributes="member: 540818"><p>very impressive, n2audio!!&nbsp; I would like to add to this thesis that the surge of mosfet use in amplifier power supply sections has drastically reduced the gap in sound quality between class A and class A/B as a result of their super fast switching capabilities.&nbsp; One trick that some manufacturers use that gets my nod of approval is they&#039;ll employ class A operation in the pre-amp stage, where current supply needs are modest, and class AB for output stage.&nbsp;&nbsp; The general rule of thumb is class D is good for bass only, while the above described gets u the best overall performance for your $$.&nbsp; One other 2cents worth I might add is that mosfets are often used in the output stage as well with many budget amplifiers--and while they can be super clean sounding, to me they all have a characteristic anemia, or what we used to call in th industry, &quot;no balls&quot;.&nbsp; Instead, try to look for Bi-polar outputs--most Jensens go this route, for example, and they&#039;re pretty decent sounding cheap amps.</p></blockquote><p></p>

[QUOTE="dcsoundguy, post: 2934, member: 540818"] very impressive, n2audio!! I would like to add to this thesis that the surge of mosfet use in amplifier power supply sections has drastically reduced the gap in sound quality between class A and class A/B as a result of their super fast switching capabilities. One trick that some manufacturers use that gets my nod of approval is they'll employ class A operation in the pre-amp stage, where current supply needs are modest, and class AB for output stage. The general rule of thumb is class D is good for bass only, while the above described gets u the best overall performance for your $$. One other 2cents worth I might add is that mosfets are often used in the output stage as well with many budget amplifiers--and while they can be super clean sounding, to me they all have a characteristic anemia, or what we used to call in th industry, "no balls". Instead, try to look for Bi-polar outputs--most Jensens go this route, for example, and they're pretty decent sounding cheap amps. [/QUOTE]

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