Sennheiser HD300 PROtect Closed Back Headphones with ActiveGard Limiter (Black)

Main Features

• Monitoring sound that always cuts through - for live stages and studio work
• Maximum ambient noise attenuation and shielding
• High-resolution acoustic system with high level of wearing comfort
• Foldable earcup design
• ActiveGard™ hearing protection technology

The HD 300 PROtect adds Sennheiser's patented ActiveGard™ technology, for advanced protection from peak levels above 110 dB.

With ActiveGard™, disruptive or harmful peaks are brought down to a safe level, preserving clarity and control at all times. The HD 300 PROtect satisfies European EC noise directives on industrial safety and noise control while safeguarding hearing for all production staff, even in the event of big surprises.

ActiveGard™

• Patented sound compression system consisting of a sophisticated electrical circuit incorporated into analogue headsets.
• Utilises a compression technology to remove the energy from an excessive incoming signal transmitted through the monitoring system, leaving the signal free of distortion.
• Can be compared to an automatic and fast-working 'intelligent' volume control. If an incoming signal rises to a level that is harmful to your hearing, it is instantly 'turned down' to a lower, more comfortable level.
• When the incoming signal returns to safe levels, ActiveGard™ reverts to its stand-by surveillance mode and volume is restored to its original level.


Sennheiser HD 300 PROtect Specifications

Transducer Principle: Dynamic, closed
Ear Coupling: Circumaural
Frequency Response: 6 Hz – 25 kHz
Impedance: 64 Ohms
Power Rating: 500 mW
Sensitivity: 108 ±3 dB SPL / 1 V rms / 1 kHz
Maximum SPL: 110 dB SPL @ 1 kHz (ActiveGard™ on)
WBCV: 0.308 V rms
Ambient Noise Reduction (passive): Max 32 dB
Distortion: < 0.1 % @ 1 kHz, 100 dB SPL
Contact Pressure: 6.0 N ± 0.75 N
Weight without cable (approx.): 297 g