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™
• Only available on the HD 300 PROtect (Item # 506898) model.
• Patented sound compression system consisting of a sophisticated electrical circuit incorporated into analogue headsets.
• Utilizes a compression technology to remove the energy from an excessive incoming signal transmitted through the
communication 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.
• 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
- Transducer Principle Dynamic, closed
- Ear Coupling Circumaural
- Frequency Response 60 Hz – 25 kHz
- Impedance 64 Ohms
- Power Rating 500 mW
- Sensitivity 108 ±3 dB SPL / 1 V rms / 1 kHz
- Maximum SPL 123 dB SPL @ 1 kHz 110 dB SPL @ 1 kHz (ActiveGard™ on) ActiveGard™ equipped model only
- 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
(distance of 140 mm, after 10 min., slider arms moved out for 5 clicks) - Ambient Temperature Operation: -15°C to +55°C
- Storage: -55°C to +70°C
- Relative Humidity ≤90% @ 40 °C
- Weight without cable (approx.) 297 g
