Field Test · Studio Gear Review
Sennheiser HD 550 Mic Bundle
Technical examination of Sennheiser’s HD 550 Mic Bundle open-back headphones
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Spec Sheet
- Circumaural
- Open-back design
- Dynamic
- Frequency range: 6 – 39,500 Hz
- Impedance: 150 Ohm
- SPL: 106.7 dB
- Total harmonic distortion at 1 kHz: <0.2%
- Velour ear pads
- Synthetic leather headband
- Detachable, single-sided, smooth 1.8 m cable with 3.5 mm mini jack plug
- Microphone compatible
- Weight (without cable): 237 g
- Colour: Black
- Includes screwable adapter 3.5 mm to 6.3 mm and drawstring bag
- Suitable for: HD 505, HD 550, HD 560S, HD 569, HD 599, HD 599 SE, HD 620S
- Add-on boom arm microphone
- Frequency: 100 Hz – 16000 Hz
- Sound pressure level: 132 dB
- Cable length: 1.5
- 3.5 mm stereo mini jack connection
- In-line volume control
- Weight: 36 g
- Colour: Black
- HD 500 BAM
- Y adapter
- Three replacement pop screens
- Operating instructions
Studio Log
| Available since | November 2025 |
|---|---|
| Item number | 631261 |
| Sales Unit | 1 piece(s) |
| Design | Over-Ear |
| System | Open |
| Impedance | 150 Ohms |
| Frequency range | 6 Hz – 39500 Hz |
| Adapter | Yes |
| Replacable Cable | Yes |
| Marrone/Argento | Black |
| Sensitivity | 107 dB |
| Type Of Connector | Mini Jack |
| Weight | 237 g |
Demo Footage
Field Photography
QC Pass — Field Test
Customer Review Summary
Overview
The Sennheiser HD 550 Mic Bundle is a comprehensive audio solution released in November 2025, aimed at users who require high-fidelity headphones combined with a reliable microphone. Priced at £251, this package is designed with an over-ear, open-back system that targets professional and audiophile markets seeking wide frequency response and natural sound reproduction. The bundle adds a detachable boom microphone and relevant accessories, broadening its use cases beyond traditional listening.
Design and Build
The headphones feature a circumaural design with velour ear pads and a synthetic leather headband, a combination that balances comfort and durability. The open-back architecture facilitates air circulation, reducing ear fatigue during extended sessions while delivering an expansive soundstage ideal for mixing or casual critical listening.
Weighing 237 grams without the cable, the headphones maintain a relatively light profile, contributing to comfort without compromising build quality. The cables are detachable and single-sided with a smooth 1.8-metre length, terminating in a 3.5 mm mini-jack plug. This length provides flexibility in most studio or desk environments.
Included in the package is a screwable adapter converting the 3.5 mm plug into a 6.3 mm jack, accommodating a variety of audio interfaces. The black finish offers a professional aesthetic suitable for various workspaces.
Acoustic Characteristics
The HD 550 headphones boast a dynamic driver system with an impedance of 150 Ohms, positioning them well for use with dedicated headphone amplifiers or professional audio interfaces. The frequency range extends from an exceptionally low 6 Hz up to 39,500 Hz, well beyond human hearing, indicating a wide and linear response capable of faithfully reproducing audio details.
Sensitivity is rated at 107 dB, ensuring efficient conversion of electrical signals into sound volume, while the sound pressure level peaks at approximately 106.7 dB, providing ample loudness potential without noticeable distortion.
The stated total harmonic distortion remains below 0.2% at 1 kHz, reflecting a clean and precise sound output suitable for critical listening and mixing tasks. The open-back design further contributes to a natural and spacious audio experience, although it naturally allows ambient noise intrusion and sound leakage.
Microphone and Additional Features
The bundle’s microphone attachment enhances versatility. It is a boom arm-style dynamic microphone with a frequency response from 100 Hz to 16,000 Hz, a range adequate for clear voice capture without excessive low-end rumble or high-frequency sibilance.
The microphone provides a high sound pressure level capacity of 132 dB, which supports handling loud sound sources without distortion. A 1.5-metre cable with a 3.5 mm stereo mini-jack connection integrates in-line volume control, enabling convenient audio gain adjustments during use.
The microphone package includes a Y adapter for connection flexibility, three replacement pop screens to manage plosives, and detailed operating instructions.
Compatibility and Accessories
The HD 550 headphones are suitable for various Sennheiser HD 500 series models, including HD 505, HD 560S, HD 569, HD 599, and HD 620S, making this microphone bundle a flexible pick for users with existing related equipment.
Additional accessories such as a drawstring bag aid portability and storage, maintaining the product’s professional usability.
Conclusion
The Sennheiser HD 550 Mic Bundle presents a focused offering combining an already respected headphone design with a practical microphone solution. Its open-back headphones deliver wide bandwidth and low distortion suited to critical monitoring. The microphone and accessories provide adequate functionality for voice applications, including streaming or desktop recording.
While the open-back scheme limits isolation, this is consistent with the product’s intended use in controlled environments rather than noisy or mobile settings. The detachable and replaceable cable system and the inclusion of adapters underscore the attention to user convenience and longevity.
At £251, the bundle targets a professional demographic willing to invest in well-engineered equipment capable of serving both listening and communication requirements.
