Sennheiser HD 300 PRO Circumaural Studio Monitoring Headphones

Uncompromised Precision & Acoustic Detail: Sennheiser HD 300 PRO

The Sennheiser HD 300 PRO closed-back circumaural headphones represent the ideal monitoring tool for sound engineers, music producers, field recordists, and broadcast technicians who demand true linear audio fidelity. Built on the heritage of Sennheiser’s legendary studio acoustics, the HD 300 PRO reproduces complex sound fields with surgical accuracy, revealing subtle micro-details across the frequency spectrum.

Engineered for high-volume environments, the HD 300 PRO features an advanced acoustic design that provides superior passive attenuation of background noise. Now available through our Sennheiser pro audio store catalog, this flagship monitoring headphone ensures long-term comfort and reliable performance across live stages, control rooms, and editing suites.

Key Features & Pro-Level Advantages

• Ultra-Linear Frequency Response: Delivers clean, neutral sound reproduction from deep sub-bass (6 Hz) to crystalline highs (25,000 Hz) for accurate mixing decisions.
• High Passive Noise Attenuation: Closed-back earcups isolate up to 32 dB of ambient background noise, maintaining sound purity in loud production booths and live rigs.
• Comfort-First Ergonomics: Specialized padded headband with split padding zone relieves pressure on the cranium, allowing extended wearing comfort during all-day sessions.
• Low Mechanical Noise Cable Design: Single-sided detachable cable incorporates a coiled strain-relief section to absorb structure-borne handling noise.
• High SPL Handling with Minimal Distortion: Handles up to 123 dB SPL with total harmonic distortion under 0.1% at 1 kHz for clean playback at higher volume levels.
• Modular Serviceability: Headband pads, ear cushions, and detachable cables are user-replaceable to extend overall product lifespan.

Key Technical Specifications

• Device Type: Professional Over-Ear (Circumaural) Studio Monitoring Headphones

• Transducer Principle: Dynamic, Closed-Back

• Frequency Response: 6 Hz – 25,000 Hz

• Nominal Impedance: 64 Ohms

• Sound Pressure Level (SPL): 123 dB SPL (1 kHz / 1 Vrms)

• Max Passive Noise Attenuation: Up to 32 dB

• Total Harmonic Distortion (THD): < 0.1% (1 kHz, 100 dB SPL)

• Max Input Power: 500 mW

• Contact Pressure: Approx. 6 N

• Cable Type: 1.55 m (5.1 ft) Detachable Single-Sided Straight Cable (with short coil strain relief)

• Connector: 3.5 mm (1/8″) Jack Plug with Screw-On 6.3 mm (1/4″) Adapter

• Weight (w/o cable): Approx. 297 g (10.4 oz)

• Color: Black

Compatibility & System Integration

• Studio Hardware Integration: Ideal for mixing consoles, audio interfaces, digital audio workstations (DAWs), headphone distribution amplifiers, and field audio recorders.

• Replacement Parts: Compatible with official Sennheiser replacement ear pads, headband cushions, and 1.55 m / 3.0 m HD 300 series replacement cables.

• Box Contents: 1x Sennheiser HD 300 PRO headphones, 1x 1.55 m detachable cable, 1x screw-on 3.5 mm to 6.3 mm (1/4″) adapter plug, instruction manual.

• System Expansion: Explore matching Sennheiser broadcast headsets, condenser studio microphones, and wireless monitoring solutions on our Sennheiser Brand Store.