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Using 250ohm headphones with amp and computer
starbux58
post Sep 5 2012, 11:58
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I have found a reseller for Beyerdynamic DT990 headphones that is selling the 250ohm model for half that of the other models 32ohm and 600ohm. So the 250ohm model is within my financial reach as its $200 US lower than the others. I am also buying an integrated stereo amplifier from NAD electronics in Canada to use the Beyers with primarily. Does anyone know if the standard headphone jacks on amplifiers and receivers will adequately drive or power these? I can buy some AKG's that I know will work but have wanted to try these Beyers for awhile now. I know too that companies like FiiO make affordable (for my budget)desktop amps too that could work with the Beyers.
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pdq
post Sep 6 2012, 16:38
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Lighter loading means the output can be driven a little closer to the supply voltages, so this partially compensates for the higher voltage needed for equal loudness with higher headphone impedance, but this effect is probably small.
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Arnold B. Kruege...
post Sep 9 2012, 04:13
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QUOTE (pdq @ Sep 6 2012, 11:38) *
Lighter loading means the output can be driven a little closer to the supply voltages, so this partially compensates for the higher voltage needed for equal loudness with higher headphone impedance, but this effect is probably small.


I would expect a small and ineffective benefit from a well-designed active-driven headphone amp. Typically their source impedances are on the same order or even much less than low impedance headphones.

OTOH, the passive (series resistor) headphone jacks on some receivers and integrated amps might come close to providing enough extra voltage due to reduced loading to do some good. Their impdeance is typcially much, much more than low impedance phones and may even come close to matching high impedance phones.
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