Sennheiser HD 300 PROtect Closed-Back Active Gard Studio Monitor Headphones

Description

The Sennheiser HD 300 PROtect are closed-back over-ear studio monitor headphones offering high-resolution audio reproduction and switchable peak level protection for musicians, audio engineers, and event staff in broadcast, studio, and live stage applications. The precision-diaphragm dynamic drivers produce a wide frequency response of 6 Hz to 25 kHz with low distortion and a maximum SPL of 123 dB. Switch on the Active Gard hearing protection technology to limit levels above 110 dBA for safe listening even with unpredictable source volumes. The HD 300 PROtect’s circumaural closed-back design provides up to 32 dB of passive isolation from ambient noise.

Thick ear cushions and headband padding ensure comfortable wearing for long listening sessions. The detachable 4.9′ single-sided cable is terminated with a 3.5mm stereo mini jack and may be swapped for other Sennheiser modular cables (available separately). A 1/4″ TRS adapter is included to allow easy connectivity with mixers, dedicated headphone amplifiers, and audio interfaces. The HD 300 PROtect headphones fold for compact storage and transport.

Complies with European EC industrial safety and noise control standards
Safeguards hearing and presence of mind for listeners
Switchable Active Gard technology attenuates signals above 110 dB down to a safe level while maintaining clear, distortion-free sound
Sensitive transducers, precision diaphragms, and a 6 Hz to 25 kHz frequency response provide neutral high-resolution audio reproduction
Soft, cushioned viscoelastic earpads and headband padding ensure consistent comfort for long sessions
Closed-back over-ear design delivers up to 32 dB of ambient-noise attenuation
Detachable single-sided cable features a 3.5mm stereo mini jack
Includes 1/4″ TRS adapter

Headphone
Maximum Sound Pressure Level (SPL)
123 dB at 1 kHz
Maximum Power Handling
500 mW
Total Harmonic Distortion (THD)
0.1%
Volume Limiting
110 dB
Foldable
Yes
Contact Pressure
6 N
Audio Connector
1/8″ / 3.5 mm TRS Straight
Included Adapter
1/4″ TRS
Cable Design
Single-Sided
Cable Color
Black
Packaging Info
Package Weight
1.16 lb
Box Dimensions (LxWxH)
9.7 x 7.6 x 3.5″