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kphooligann
52
Aug 11, 2017
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With an output impedance of one half ohm, this amp appears to be for low impedance headphones only. That's too bad. I need a more versatile amp. Also, the exposed tube is a burn hazard! I don't know why amps are built w/o tube shielding!
Aug 11, 2017
TheTerriblePuddle
119
Aug 11, 2017
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Ehm, the lower the output impedance the better.
Aug 11, 2017
kphooligann
52
Aug 11, 2017
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To an extant I believe. It's my understanding that a high impedance headphone, say 300 ohms, would perform better with a 10 ohm output resistance amp. It's a complex issue, not as cut and dried as the lower the better. InnerFidelity may have an article on this. My understanding is that it's the ratio of amp output resistance to headphone resistance that has to be low. But, not too low. What is too low I don't know. What is too high is more that a tenth I believe. Here's a link, https://www.innerfidelity.com/content/musings-headphone-amplifier-output-impedance .
Aug 11, 2017
Marvey.Purrin
213
Aug 12, 2017
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Low output impedance is good for both low and high impedance headphones. Aa a rule of thumb, (Z transducer / Z source) > 5 is good. In general, there is no such thing as too low. The exceptions are to color certain headphones with uneven impedance curves in a certain way or loosen up the amp's grip on certain headphones that might be too dry sounding.
Aug 12, 2017
kphooligann
52
Aug 12, 2017
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Aug 12, 2017
Elsid
698
Aug 12, 2017
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Careful Ralphie!
Aug 12, 2017
amoeba1126
459
Aug 14, 2017
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It's not a burn hazard if you don't touch it ;) Resist touching the shiny!
Aug 14, 2017
kphooligann
52
Aug 14, 2017
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Accidents happen & I have cats!
Aug 14, 2017
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