Sennheiser Headphone HD 400 PRO

Technical Data:

Impedance
120 Ω

Frequency response
6 Hz to 38 kHz (-10 dB)

Sound pressure level (SPL)
110 dB (1 kHz / 1 V RMS)

THD, total harmonic distortion
< 0.05 % (1 kHz / 90 dB SPL)

Ear coupling
circumaural

Jack plug
3.5 mm jack plug with 6.3 mm adapter

Weight
240 g

Storage temperature
–55 °C to +70 °C (–67 °F to 158 °F)

Operating temperature
–15 °C to +55 °C (5 °F to 131 °F)

Operating relative humidity
≤ 90 %

Accoustic principle
dynamic, open

Ear pad material
Velour