AKG K 271

Form Factor	Headphone - Circumaural
Signal Path	Passive Hardware
Weight	240 g without cable
Frequency Response	16 to 28,000 Hz
Sensitivity Headphones	91 dB SPL/mW
Rated Impedance	55 ohms
Connections	Screw-on Jack Combo (1/4" and 1/8", Gold) · 3.5mm Miniature Phone Jack (1/8") · Stereo, Plug (Male) Mini XLR (Headphone Left) · XLR · Socket (Female)
Links	http://www.akg.com