Sennheiser HD 550 Audiophile Open-Back Over-Ear Headphones

The Sennheiser HD 550 delivers an immersive high-fidelity listening experience with exceptional detail, natural tonal balance and an expansive soundstage. Designed for music enthusiasts, audiophiles, gamers and anyone seeking greater clarity from their favourite entertainment, these open-back headphones combine precision-engineered dynamic transducers with a lightweight, comfortable design.

Featuring a 150-ohm transducer system manufactured in Ireland, the HD 550 reproduces frequencies from 6Hz to 39.5kHz, revealing subtle musical textures, deep bass and finely detailed high frequencies. Its open acoustic construction creates a spacious, natural presentation that brings listeners closer to the original recording.

Discover a New World of Musical Detail

The HD 550 is engineered to reveal subtle details that conventional headphones can overlook. From the delicate breath of a vocalist and the resonance of acoustic instruments to distant environmental effects in movies and games, its precise acoustic tuning delivers a realistic and engaging listening experience.

Carefully balanced bass, articulate midrange and extended treble combine to reproduce music with clarity and natural expression without excessive harshness or sibilance.

Open-Back Acoustic Design

The HD 550 uses an open-back acoustic architecture with high-grade metal mesh earcup covers. This design allows air and sound to move more freely around the transducers, helping reduce unwanted internal reflections and creating a wider, more natural soundstage.

The result is a spacious stereo presentation with accurate instrument placement and a convincing sense of depth, making the headphones particularly suitable for critical music listening, cinematic entertainment and immersive gaming.

Precision-Engineered Dynamic Transducers

At the heart of the HD 550 is a Sennheiser dynamic transducer system manufactured in Ireland. Its 150-ohm design is engineered to deliver accurate sound reproduction, controlled low-frequency response and detailed high-frequency performance.

With a frequency response extending from 6Hz to 39.5kHz, the headphones provide impressive extension at both ends of the audio spectrum while maintaining natural midrange reproduction.

Extended Bass and Balanced Midrange

Building upon the acoustic characteristics of the Sennheiser HD 599, the HD 550 provides improved low-frequency extension while preserving a balanced midrange and precise treble presentation.

Deep bass notes are reproduced with definition and control, while vocals and instruments remain clear and naturally positioned within the stereo soundstage. This carefully tuned response makes the HD 550 suitable for a wide range of musical genres.

Lightweight Comfort for Extended Listening

Weighing just 237 grams, the HD 550 is designed for comfortable listening over extended periods. Its lightweight construction and gentle clamping force help minimize pressure on the head and ears.

Soft synthetic velour earpads provide a comfortable circumaural fit, while the padded headband distributes weight evenly for long listening sessions.

Immersive Gaming and Entertainment

The HD 550's spacious soundstage and precise stereo imaging make it an excellent choice for gaming, movies and multimedia entertainment. Subtle environmental sounds, distant footsteps and directional audio cues are reproduced with clarity, helping create a more immersive experience.

Its microphone-ready design also provides flexibility for users who wish to incorporate a compatible microphone accessory into their listening setup.

Detachable Cable and Versatile Connectivity

The HD 550 includes a detachable 1.8-metre audio cable with a standard 3.5mm stereo plug. A screw-on 6.35mm adapter is supplied for connection to compatible headphone amplifiers, stereo receivers and professional audio equipment.

The wired connection provides dependable analog audio transmission without requiring batteries, Bluetooth pairing or charging.

Built for Long-Term Ownership

Sennheiser designs its audiophile headphones for durability and long-term performance. The HD 550 features replaceable components, including cables and earpads, helping extend the useful life of the headphones.

Its sturdy construction and high-grade metal mesh earcup covers provide reliable protection while preserving the acoustic advantages of the open-back design.

Features:

• Premium Sennheiser audiophile open-back headphones
• Natural, spacious high-fidelity sound reproduction
• Precision-engineered dynamic transducers manufactured in Ireland
• 150-ohm nominal impedance
• 6Hz to 39.5kHz frequency response
• 106.7dB SPL at 1V RMS
• Total harmonic distortion below 0.2%
• Open-back acoustic design
• High-grade metal mesh earcup covers
• Expansive stereo soundstage
• Accurate instrument separation and spatial imaging
• Extended low-frequency response
• Natural, balanced midrange reproduction
• Detailed, airy high-frequency performance
• Lightweight 237-gram construction
• Gentle clamping force for extended comfort
• Soft synthetic velour earpads
• Comfortable padded headband
• Over-ear circumaural design
• Suitable for critical music listening
• Excellent for movies, gaming and multimedia
• Microphone-ready design for compatible accessories
• Detachable 1.8-metre audio cable
• 3.5mm stereo audio connection
• 6.35mm screw-on adapter included
• Replaceable cables and earpads
• No batteries or charging required
• Drawstring storage bag included

Specifications:

General

• Brand: Sennheiser
• Model: HD 550
• Article Number: 700455
• Product Type: Wired Audiophile Over-Ear Headphones
• Wearing Style: Over-Ear / Circumaural
• Ear Coupling: Over-Ear
• Acoustic Design: Open-Back
• Transducer Principle: Dynamic
• Transducer Manufacturing: Ireland

Driver & Acoustic Performance

• Transducer Type: Dynamic
• Frequency Response: 6Hz - 39.5kHz
• Nominal Impedance: 150 Ohms
• Sound Pressure Level: 106.7dB SPL (1V RMS)
• Total Harmonic Distortion: Less Than 0.2% (1kHz / 90dB SPL)
• Soundstage: Open, Spacious Stereo Presentation
• Noise Isolation: Open-Back / Minimal Passive Isolation
• Active Noise Cancellation: No

Connectivity

• Connection Type: Wired Analog
• Audio Connector: 3.5mm Stereo Plug
• Included Adapter: 3.5mm to 6.35mm Screw-On Adapter
• Cable Length: 1.8m (5.9 ft)
• Cable: Detachable
• Microphone Compatibility: Microphone-Ready Design
• Wireless Connectivity: No
• Battery Required: No

Construction & Comfort

• Earcup Construction: Open-Back with High-Grade Metal Mesh Covers
• Earpad Material: Synthetic Velour
• Headband: Adjustable, Padded
• Clamping Force: Low-Pressure Comfort Design
• Weight: 237g (8.4 oz)
• Replaceable Accessories: Earpads and Cable

Recommended Applications

• Music Listening: Critical and High-Fidelity Listening
• Movies: Immersive Stereo Playback
• Gaming: Spatial Audio and Directional Sound Awareness
• Remote Work: Compatible with Suitable Audio and Microphone Equipment

What's in the Box:

• 1 x Sennheiser HD 550 Open-Back Headphones
• 1 x Detachable 1.8m Audio Cable with 3.5mm Plug
• 1 x 3.5mm to 6.35mm Screw-On Adapter
• 1 x Drawstring Storage Bag