AKG Acoustics K 701 headphones Measurements

Sidebar 3: Measurements

It is difficult to make a meaningful measurement of a headphone's frequency response, not least because a flat response is not actually what is required. However, I did measure how the K 701's impedance changes with frequency (fig.1), as that gives an indication of how hard the headphones will be for the amplifier to drive. The AKG's impedance ranges between 60 and 65 ohms across most of the audioband, with a low electrical phase angle. The angle starts to increase above the low treble, but so does the impedance, due to the voice-coil inductance. This increase will therefore be benign. The AKG will be a little harder to drive than, say, the 200 ohms of a typical Sennheiser design, but easier than the 30 ohms of a Grado. There should be no problems with good headphone amplifiers.—John Atkinson

Fig.1 AKG K 701, electrical impedance (solid) and phase (dashed). (2 ohms/vertical div.)

AKG Acoustics US
914 Airpark Center Drive
Nashville, TN 37217
(614) 620-3800

onebadfishy's picture

And if only AKG gave a rats ass about supporting their customers.  It's a sad joke...  I've had 3 pairs of K701s...  two have had problems...  and it sure as hell isn't like I go around abusing my cans...  Here's an AKG horror story for you:  I bought a pair for $400 bucks and their support staff never replied...  yes...  they avoided me...  so I did it the right way...  i ordered another pair...  called my old pair defective...  and ended with two working pairs of cans rather than a single pair of shit...  as it turns out another pair has died out...  Do I travel with these?  Nope...  Do I try not to let anything hurt my prized pair of cans?  Yes.  And yet I have issues now with audio dropping due to a short in these cans.  So here's my conclusion...  AKG is too stupid to make a decent, reliable pair of headphones.  They are a worthless business that needs to die and be replaced.  Their support won't respond to this.  They have great reviews after all, so they can delude themselves into not competing...  like every other company that half asses their way through success.  I'll have visual images of myself dancing on the AKGs grave when it happens.  I'll share it with the world...  I was trying to be polite, but truthfully, they suck raw cock!