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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 5 2012, 17:15
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There is another factor to consider. Very often the headphone amplifier uses a single-ended power supply, and because of this it needs a blocking capacitor in the output to remove the DC component and pass just the AC.

A capacitor of sufficient size to pass very low frequencies can be large/bulky/expensive, so often the manufacturer will cut corners and use a capacitor that is large enough for high-impedance headphones, but has low-frequency roll off for very low impedance headphones, such as 32 ohms.
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