Sennheiser HD 300 PROtect

Properties:

The HD 300 PROtect is a closed over-ear headphone with a frequency range from 6 to 25,000 Hz and an impedance of 64 Ohms. The headphones have been specially designed for working in noisy environments and reliably attenuate ambient noise up to 32 dB thanks to their passive design. In addition, the HD 300 PROtect features switchable ActiveGard® technology, which lowers the maximum sound pressure level from 123 dB to 110 dB. Soft ear and head cushions ensure a pleasant wearing comfort even over a longer period of time. The sensitive transducers guarantee powerful and distortion-free reproduction even at high sound pressure levels.

• Switchable ActiveGard® technology for increased hearing protection
• Precise and linear sound reproduction
• Soft ear and head pads for long wearing comfort
• Passive external noise reduction
• Exchangeable cable
• Retractable ear cups
• Robust and durable

Technical Specifications:

• Transducer Principle: dynamic, closed
• Frequency Response: 6 - 25,000 Hz
• Impedance: 64 Ohms
• Resilience: 500 mW
• Sensitivity: 108 ± 3 dB SPL / 1 Vrms / 1 kHz
• Max. Sound Pressure Level (without ActiveGard®): 123 dB SPL at 1 kHz
• Max. Sound Pressure Level (with ActiveGard®): 110 dB SPL at 1 kHz
• Ambient Noise Attenuation (passive): max. 32 dB
• Total Harmonic Distortion: less than 0.1 % at 1 kHz, 100 dB SPL
• Pressure Force: approx. 6 N ± 0.75 N

General Product Information:

• Cable Length: approx. 1.5 m
• Weight (without cable): approx. 297 g
• Operating Temperature: -15° to +55° C (max. 90 % rel. air humidity)
• Storage Temperature: -55° to +70° C (max. 90 % rel. air humidity)

Included in Delivery:

• 1x Signal cable with 3.5 mm jack plug, 1.5 m
• 1x Screw adapter 3.5 mm jack plug to 6.3 mm jack plug
• 1x Instruction manual