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Sennheiser HD 300 PRO

The 300 PRO series is a pleasure to wear due to a combination of factors, including new padding material, a comfort zone for the temples of glasses and split headband padding that removes any pressure from the sensitive area of the fontanelle. The headphones have also been given a new fork design that ensures their contact pressure is evenly distributed over the entire ear pad, ensuring both increased comfort and excellent sealing against outside noise.

Sound reproduction modelled on the legendary HD 250 Linear
For inspiration during the design process, Sennheiser's acoustic engineers turned to the HD 250 Linear, a classic model that is still highly regarded amongst professionals today. Despite the difference in the ear cup shapes, the engineering team was able to get extremely close to the precise, linear sound reproduction of the original model, thus placing the HD 300 PRO at the peak of Sennheiser's monitoring headphone portfolio. The detailed, linear response makes the 300 PRO series ideal for music-makers, too.

Attention to detail
When superior performance is required, details matter. The 300 PRO series' detachable cables offer improved protection against handling noise, thanks to a small series of coils that acoustically decouple the cable from the headset. The series come with a rugged, bendable and twistable headband and customizable nameplates to feature a company logo on the ear cups.

The models at a glance
• HD 300 PRO: the new top-of-the-range monitoring headphones
• HD 300 PROtect: as HD 300 PRO, with selectable (on/off) ActiveGard

Sennheiser HD 300 PRO

Technical Data
Headphones HD 300 PRO series
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 (ActiveGard off)
• 110 dB SPL @ 1 kHz (ActiveGard on)*
*ActiveGard equipped models 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)

General Data – HD 300 PRO series
Ambient Temperature: Operation: -15°C bis +55°C
Storage: -55°C bis +70°C
Relative Humidity: =90% @ 40 °C
Weight without cable (approx.):
• HMD 300: 319 g
• HMD 301: 242g
• HD 300 PRO: 297 g

Sennheiser HD 300 PRO


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