Sennheiser HD 300 PROtect Monitoring Headphone with On/Off Selectable ActiveGard Limiter (Used)

The Sennheiser HD 300 PROtect Monitoring Headphone is a top-tier audio solution designed for professionals who demand exceptional sound quality and comfort. Perfect for studio work and live performances, these closed headphones boast high-sensitivity transducers with precision diaphragms, delivering high-resolution, neutral, and distortion-free sound across the entire frequency spectrum. Crafted for unmatched listening experiences, the HD 300 PROtect ensures that every note and nuance is captured with utmost clarity.

One of the standout features is its innovative ActiveGard technology, which can be turned on or off to protect against sudden audio peaks, providing a safe listening environment without compromising audio quality. The headphones also feature viscoelastic earpads and specially sealed acoustic elements, offering efficient shielding against external noise and ensuring maximum comfort even during extended use. The design accounts for optimum pressure distribution and includes a recess for the fontanelle, ensuring that users experience minimal discomfort.

In addition to its superior sound quality and comfort, the Sennheiser HD 300 PROtect is built to last. The robust design includes entirely field-replaceable components, making it a durable investment for professionals. Coupled with a coiled cable that filters out structure-borne noise directly at the earpiece, these headphones are engineered to meet the highest standards of audio fidelity and reliability.

Key Features

• High-resolution and distortion-free sound for professional monitoring
• Linear frequency response
• Efficient, passive noise attenuation
• Robust design
• Entirely field-replaceable components

Specifications

• Acoustic principle: Dynamic, closed
• Ear coupling: Circumaural
• Frequency response: 6 - 25,000 Hz
• Impedance: 64 ohm
• Power rating: 500 mW
• Sensitivity: 108 -3 dB SPL / 1 Vrms / 1 kHz
• Maximum SPL (without ActiveGard): 123 dB SPL @ 1 kHz
• Maximum SPL (ActiveGard off): 123 dB SPL @ 1 kHz
• Maximum SPL (ActiveGard on): 110 dB SPL @ 1 kHz
• Ambient noise attenuation: <= 32 dB
• Distortion: < 0.1% @ 1 kHz, 94 dB SPL
• Contact pressure: approx. 6.0 N
• Weight (without cable): approx. 297 g
• Cable length: approx. 1.55 m
• Operating Temperature: -15°C to +55°C (5°F to 131°F)
• Storage Temperature: -55°C to +70°C (-67°F to 158°F)
• Relative humidity: <= 90%

Package Contents

• Sennheiser HD 300 PROtect Monitoring Headphone
• Coiled cable
• Documentation