Sennheiser HD 550 Open-Back Over-Ear Headphones (SEN-700455) | Like New
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1 Year WarrantyIncludedThe Sennheiser HD 550 Over-Ear Open-Back Headphones (700455) are audiophile-grade wired headphones designed for critical music listening, gaming, movies and long work sessions at your desk. The HD 550, which is based on Sennheiser's in-house 150-ohm dynamic transducer that is made in Ireland, has a remarkably broad 6 Hz–39.5 kHz frequency response with less than 0.2% total harmonic distortion, revealing genuine transients, micro-detail, and a roomy soundstage. Perfect for lossless libraries, immersive gaming and hi-fi streaming, the open-back earcup design with acoustically transparent mesh and angled 38 mm drivers creates a 3D, room-like presentation that puts you in the center of the mix. These over-ear headphones are comfortable enough for hours of concentrated listening without becoming tired due to their lightweight 150-ohm chassis, cushioned headband, and soft synthetic velour ear pads. The Sennheiser HD 550 readily couples with headphone amplifiers, audio interfaces and home stereos thanks to its detachable 1.8 m cable that ends in 3.5 mm and the provided 1/4" converter, providing enthusiasts with a simple entry point into true audiophile open-back sound.
Quick specs
- Product Type
- Wired Headset
- Headphone Type
- Open-back, dynamic, over-ear (circumaural)
- Wearing Style
- Headband, around-the-ear
- Driver Type
- Dynamic transducer (38 mm diameter, made in Ireland)
- Frequency Response
- 6 Hz – 39.5 kHz
- Nominal Impedance
- 150 Ω
Key Features
Audiophile open-back design with metal mesh earcups for airy, spacious sound and natural instrument separation in an over-ear form factor.
In-house 150-ohm dynamic transducer (38 mm) built in Ireland, tuned for open, natural sound with punchy bass, neutral mids and precise, airy treble.
Extremely wide 6 Hz–39.5 kHz frequency response to reproduce deep sub-bass you feel and ultra-extended treble that preserves fine spatial cues.
Low distortion performance with THD under 0.2% at 1 kHz / 90 dB SPL, maintaining clarity and control even at higher listening levels.
Angled driver geometry and acoustic foam tuning for a wide, 3D soundstage that enhances positional audio, music imaging and cinematic immersion.
Synthetic velour ear pads and soft-padded headband for a gently snug, breathable fit that stays comfortable during long gaming or listening sessions.
Detachable 1.8 m (approx. 5.9–6 ft) unbalanced cable with 3.5 mm plug and included 1/4" adapter for flexible connection to amps, interfaces and stereos.
Robust HD 500-series chassis with steel-reinforced sliders designed for everyday reliability.
Over-ear, open-back wired configuration (no Bluetooth, no ANC) to prioritize pure, unprocessed sound quality for serious listeners.
Benefits
- Unlock hidden details in your music and games with an open-back Sennheiser HD 550 tuning that stays neutral and revealing instead of “V-shaped” or overly bass-heavy.
- Experience a wide, realistic soundstage where instruments and in-game sounds occupy believable positions, improving immersion and spatial awareness for both entertainment and competitive play.
- Enjoy long, comfortable sessions thanks to lightweight construction, breathable velour earpads and a relaxed clamping force that reduce heat build-up and pressure points.
- Pair easily with desktop DAC/amps, hi-fi receivers, and audio interfaces—150 ohms makes the HD 550 scale beautifully with better gear while remaining accessible to many home setups.
- Hear vocals, dialogue, and instruments as they were mixed, with a balanced midrange that keeps voices clear and avoids the “scooped” sound of bass-boosted consumer headphones.
- Invest confidently in a durable, serviceable open-back headphone with replaceable pads and a detachable cable, backed by Sennheiser’s build quality.
- Upgrade from closed-back or gaming headsets to a more refined listening experience that makes lossless streaming, vinyl, and high-resolution audio feel worth the investment.
| Manufacturer | Sennheiser |
|---|---|
| Manufacturer Part Number | 700455 |
| Product Name | Sennheiser HD 550 Over-Ear Open-Back Headphones |
| Product Type | Wired Headset |
| Headphone Type | Open-back, dynamic, over-ear (circumaural) |
| Wearing Style | Headband, around-the-ear |
| Driver Type | Dynamic transducer (38 mm diameter, made in Ireland) |
| Driver Design | Angled drivers with laminate Duofoil (aluminum) diaphragm, vented magnet system |
| Frequency Response | 6 Hz – 39.5 kHz |
| Nominal Impedance | 150 Ω |
| Sound Pressure Level (SPL) | 106.7 dB (1 kHz / 1 Vrms) |
| Total Harmonic Distortion | < 0.2% (1 kHz / 90 dB SPL) |
| Ear Coupling | Around-the-ear (over-ear) |
| Ear Pad Material | Synthetic velour |
| Clamp Force | Low clamping force for comfort |
| Cable | Detachable 1.8 m (5.9 ft / 74") single-sided unbalanced cable, 3.5 mm plug |
| Connector (Headphone Side) | 2.5 mm? (balanced-ready on left earcup; confirm via manual) |
| Included Accessories | 3.5 mm to 6.35 mm (1/4") screw-on adapter, drawstring cloth bag |
| Weight (without cable) | 237 g (8.35 oz) |
| Weight (with cable) | Approx. 275 g (9.7 oz) |
| Ear Cup Dimensions (Outer) | Width: 3.535", Height: 4.49", Depth: 1.867" |
| Operating Principle | Open-back with acoustic mesh grilles |
| Connectivity | Wired only (no Bluetooth, no wireless) |
| Use Cases | Critical listening, gaming, movies, remote work |
Frequently Asked Questions
Sennheiser HD 550 Open-Back Over-Ear Headphones (SEN-700455) | Like New
What type of headphones are the Sennheiser HD 550?
What is the advantage of open-back headphones?
Are the HD 550 headphones wired or wireless?
Do these headphones require an amplifier?
Are the HD 550 headphones good for music listening?
Can they be used for gaming?
Are they comfortable for long listening sessions?
Do they isolate external noise?
Are they suitable for studio monitoring?
Do they include a detachable cable?
What devices are compatible with the HD 550?
Are they good for watching movies?
Do they work with portable audio players?
Are they designed for audiophiles?
Can they be used for home audio setups?
Do they support high-resolution audio playback?
Are the ear cushions replaceable?
Are these headphones lightweight?
Are they suitable for professional audio work?
Who are the Sennheiser HD 550 headphones ideal for?
Sennheiser HD 550 Open-Back Over-Ear Headphones (SEN-700455) | Like New
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