A question for any AGD Audion owners hanging around - have any of you had experience with the earlier iterations of the output stage "tubes?" I am curious about how they sounded compared to the current "mk3's."
My new review for The Absolute Sound comparing AGD GAN amps with BHK300’s
I am normally best suited to be behind the camera, but The Absolute Sound convinced me I should try my hand at reviewing. In listening to AGD’s Audion GAN amps I compared them with my BHK300’s. This was done direct from the my Dac - PS Audio DS MKII with APS transformers, to eliminate any preamp interactions.
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A loudspeaker is a motor. Also a transducer. Output capacitance is really not a “thing” for class D amps, other than internal capacitance (parasitic) can effect the maximum switching frequency and possibly efficiency of the switching device, how much of the switched energy is converted to heat. That’s the only advantage of GaN devices; higher voltage, less heat, higher switching frequencies. It has nothing to do with transfer of energy to transducers (loudspeakers). Im not a “naysayer”. I’m just a “factsayer”. I strongly dislike those manufacturers or reviewers who use consumers’ ignorance of technology to sell stuff. These “proprietary” GaN “audio grade”devices grabbed and used for their singular audio use/purity is a “snake oil” claim. Pure and simple. |
@wolfie62 Output capacitance of a class D isn't a thing as you say, but output capacitance of the output devices is. Its nice to have that low for better switching.
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Exactly what I already said. And “low output capacitance for better switching” is exactly my point!! Those output devices never see audio frequencies!! They are switching at much higher frequencies than the audio spectrum!! So finally we are in agreement. The GaN devices are switchers and are NOT audio devices. |
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