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I know DEAD HORSE.. but if you feel like it,.. Help me with Class A/B vs Class D.
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<blockquote data-quote="So Low iT Hz" data-source="post: 8213443" data-attributes="member: 658541"><p>I have to chime in here on the class differences, mainly because its important to understand how they work to really know what to look for or how to properly implement them. And on a side note class D is technically NOT an amplifier, as only pure analog circuits can be called amplifiers, but thats too far gone at this point and basically just an extra tidbit for your brain.</p><p></p><p>This will be very simplified, but enough for you to understand the key points. First off is class A. You send in a signal, which is routed through an amplification circuit, out comes a bigger signal. Simple, and predictable ("root two"). Efficiency is lower in comparison because the FETs are more or less wide open, like a bucket of water, waiting for a signal to get "poured" into it.</p><p></p><p>Class D is waaaaaay different, until the very last step. First thing that happens is the signal gets chopped into an infinite number of little "chunks", individually augmented, and reconstructed to the new signal, and sent through to the output. The problem that arised a decade ago with class D was that the clock speed of the processor that deconstructed and reconstructed the waveform was below the higher end of the audible frequency range, IMO 25 kHz. This meant that higher frequency notes were impossible to "amplify" due to the limitations of the processing. Thus class D was reserved for low frequency reproduction, such as bass amplifiers. Nowadays, the full range class D is much improved, as the processing is more powerful. As stated before, the output of a class D is very similar to an analog amplifier, so similar that you probably wouldnt be able to tell without the use of a tool of some kind. There are more phase issues between the output voltage and current, as the traditional analog circuits have basic electrical laws optimizing these conditions. Class D's do not.</p><p></p><p>Brands that have made a name for themselves with high power full range digital amplifiers are becoming increasingly good at producing quality reproduction with higher efficiency in a smaller and smaller footprint. Stetsom and Soundigital come to mind there. I ran a Stetsom 2k for my highs and omg itd make your ears bleed from a block away. But when it comes down to it, you cant go wrong with most "cheap" analog amplifiers, so long as you buy like four of them to get the output that they rate for one lol, but the "cheap" full range digital amps out there are typically garbage. I had a choice between the digital four channel Sundown amps and the 100.4 and I opted for two 100.4's. And I cant say enough about how good they sound. Though I do miss my Stetsom...</p></blockquote><p></p>
[QUOTE="So Low iT Hz, post: 8213443, member: 658541"] I have to chime in here on the class differences, mainly because its important to understand how they work to really know what to look for or how to properly implement them. And on a side note class D is technically NOT an amplifier, as only pure analog circuits can be called amplifiers, but thats too far gone at this point and basically just an extra tidbit for your brain. This will be very simplified, but enough for you to understand the key points. First off is class A. You send in a signal, which is routed through an amplification circuit, out comes a bigger signal. Simple, and predictable ("root two"). Efficiency is lower in comparison because the FETs are more or less wide open, like a bucket of water, waiting for a signal to get "poured" into it. Class D is waaaaaay different, until the very last step. First thing that happens is the signal gets chopped into an infinite number of little "chunks", individually augmented, and reconstructed to the new signal, and sent through to the output. The problem that arised a decade ago with class D was that the clock speed of the processor that deconstructed and reconstructed the waveform was below the higher end of the audible frequency range, IMO 25 kHz. This meant that higher frequency notes were impossible to "amplify" due to the limitations of the processing. Thus class D was reserved for low frequency reproduction, such as bass amplifiers. Nowadays, the full range class D is much improved, as the processing is more powerful. As stated before, the output of a class D is very similar to an analog amplifier, so similar that you probably wouldnt be able to tell without the use of a tool of some kind. There are more phase issues between the output voltage and current, as the traditional analog circuits have basic electrical laws optimizing these conditions. Class D's do not. Brands that have made a name for themselves with high power full range digital amplifiers are becoming increasingly good at producing quality reproduction with higher efficiency in a smaller and smaller footprint. Stetsom and Soundigital come to mind there. I ran a Stetsom 2k for my highs and omg itd make your ears bleed from a block away. But when it comes down to it, you cant go wrong with most "cheap" analog amplifiers, so long as you buy like four of them to get the output that they rate for one lol, but the "cheap" full range digital amps out there are typically garbage. I had a choice between the digital four channel Sundown amps and the 100.4 and I opted for two 100.4's. And I cant say enough about how good they sound. Though I do miss my Stetsom... [/QUOTE]
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I know DEAD HORSE.. but if you feel like it,.. Help me with Class A/B vs Class D.
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