Sign up and join a community that's passionate about exploring the world of entertainment & technology.
The 75-ohm output impedance measurement showed a minor change in frequency response, a bump of about 1.2 dB centered at 120 Hz.
Just another point of clarification for those who may worry about a lack of detail in these headphones as suggested. These headphones do have a V-shaped frequency curve, which does make midrange details somewhat less apparent than the extremes of the sonic range. Even so, it happens to have a rather punchy, sparkly sound that makes listening in movies and music more engaging than a flat or N-shaped frequency curve, as the Audio Technicas, Sennheisers and, to some degree, the Grados possess.
Please bear in mind that this graph is technically inaccurate in the uppermost frequencies. First, I have looked long and hard at graphs and listened to the headphones on this site. Although this graph seeks to represent the DT990 well, it makes it seem as if it has a rolled-off, muddy upper treble response. I can tell you that the Beyerdynamics do not exhibit such a response, but, in fact, are brighter in the uppermost highs than even the ATH-AD900 and, in some ways, the Grado RS-2! And I am not the only one sharing in that consensus, either, as you can see on Head-Fi and other review sites with graphs showing the polar opposite of here. It is clear that there is something wrong in the testing methodology of these headphones.
Copyright © 2013 Bonnier Corp. All rights reserved. Reproduction in whole or in part without permission is prohibited.