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Samsung's hybrid tube amplifier, was: "For shame! What the frilly heck!"
StephenPG
post Dec 6 2012, 12:18
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Samsung insanity?

That's it, I officially give up... the world has gone mad...
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punkrockdude
post Dec 6 2012, 12:50
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Are they trying to make us think that a tube can alter a clipped waveform into a pure sine wave?
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Arnold B. Kruege...
post Dec 6 2012, 18:03
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QUOTE (punkrockdude @ Dec 6 2012, 06:50) *
Are they trying to make us think that a tube can alter a clipped waveform into a pure sine wave?


Tubes can, and so can analog tape machines. It takes a frequency-dependent nonlinearity with certain parameters.
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punkrockdude
post Dec 6 2012, 20:19
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QUOTE (Arnold B. Krueger @ Dec 6 2012, 18:03) *
QUOTE (punkrockdude @ Dec 6 2012, 06:50) *
Are they trying to make us think that a tube can alter a clipped waveform into a pure sine wave?


Tubes can, and so can analog tape machines. It takes a frequency-dependent nonlinearity with certain parameters.
Can they really remove ovetones that clipped signals contain?
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Arnold B. Kruege...
post Dec 7 2012, 15:01
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QUOTE (punkrockdude @ Dec 6 2012, 14:19) *
QUOTE (Arnold B. Krueger @ Dec 6 2012, 18:03) *
QUOTE (punkrockdude @ Dec 6 2012, 06:50) *
Are they trying to make us think that a tube can alter a clipped waveform into a pure sine wave?


Tubes can, and so can analog tape machines. It takes a frequency-dependent nonlinearity with certain parameters.
Can they really remove ovetones that clipped signals contain?


Yes.

Let's say that a 10 volt RMS signal is clipped at +/- 5 volts peak with a sharp cutoff. This is going to give you square wave-like clipping with the harmonics falling off in the pattern we see with square waves. There will be a goodly amount of higher order harmonics.

Let's say that we then add a soft clipping circuit that starts at 2 volts and gently cuts off by 4.9 volts. There will be far more actual distortion, but it will tend to be composes of lower order harmonics that are more likely to be masked by the music itself.
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