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Beyerdynamic DT990 Ohm question

post #1 of 3
Thread Starter 

Hi :)

 

I just received a second hand set of Beyer dt990 premium headphones and they were supposed to be the 32 ohm version but upon listening to them they sounded kind of quiet for 32 ohm, so I tested the resistance of them with a fluke DMM by testing the plug, one lead the the tip and the other to the sleeve and it shows a reading of around 253 ohm.

 

Now I would actually rather have the 250 ohm version, but is a DMM able to accurately measure the resistance of a headphone this way?

 

By the way there are no markings on the plastic part of plug.

post #2 of 3

You might want to post this in the Sound Science section of the forum.

post #3 of 3

I cannot tell you for sure, but I do know that the impedance is a complex function. In other words, it varies with frequency, which means it has to be under load, the audio signal. Considering that the impedance of speakers can very with frequency, this would support my thoughts on the matter. But the specification for the headphone that is used in sales literature may be the resistance measured in your way, the actual resistance.

 

Bob Graham


Edited by r010159 - 2/21/14 at 9:16pm
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