It is based on the successful K271 MKII Studio headphones combined with a rugged dynamic microphone. The flexible microphone arm mutes the microphone automatically as it is moved up. The microphone can be mounted to the left or right side, depending on personal preference and available space.

The HSD271 features a switch in the headband that mutes the audio just as soon as the headphones are taken off. The plug-in cable with a six-pin mini XLR connector allows quick replacement of the cable.

Over-ear, closed design
for high comfort and high noise attenuation
Sealed design
for recordings without unwanted spill
Dynamic microphone on flexible boom
for maximum robustness
Auto-mute for headphone and microphone
prevents feedback and protects headphones when not in use
Self-adjusting headband
allows extended wear without discomfort

General
Headphone type: closed
Audio Frequency bandwidth: 16 to 28000 Hz
Sensitivity headphones: 104 dB SPL/V
Rated Impedance: 55 Ohms
Earpads: leatherette, velvet
Detachable cable: yes
Audio Interface
Type: Mini XLR
Gender: Male
Contacts: 6-pin
Interface Finish: Gold
Dimensions / Weight
Length: 110 mm
Width: 205 mm
Height: 200 mm
Microphone
Polar Pattern: hypercardioid
Audio Frequency bandwidth: 60 to 17000 Hz
Sensitivity: 1 mV/Pa
Equivalent Noise Level: 15 dB-A
Electrical Impedance: 600 Ohms
Recommended Load Impedance: 2000 Ohms