Sennheiser
A benchmark for total audio immersion.
HD 650 Audiophile Headphones
The HD 650 open-back headphone is beloved by audiophiles for its musical, non-fatiguing sound while offering intimate levels of detail. Upon the first note, your favorite tracks reveal their true potential, and each moment of that performance becomes an opportunity to react all over again. For the hi-fi enthusiast that prioritizes engaging sound quality, the HD 650 is an instant upgrade.
The signature sound starts with our in-house acoustics. Audiophiles know that the best components perform at their peak when nothing stands in their way. The 42mm transducer deploys a 38mm diaphragm with an aluminum voice coil specifically tuned for extended, critical listening: overall treble and low-frequency presence is effortless while the midrange is reproduced with lifelike composure -- none sacrificing their organic roots to get there.
Made in Ireland at our state-of-the-art production facility, the HD 650 delivers more -- more details discovered, more musicality, and more time for blissful listening.
Tech Specs
- Headphone Type: Wired Over-Ear
- Connection Type: 6.35mm plug (unbalanced)
- Impedance: 300 Ω
- Driver Diameter: 38mm
- THD: <0.05% (100 dB, 1 kHz)
- Sound Pressure Level: 103 dB (1 V)
- Frequency Response: 10Hz - 41KHz
- Acoustic Principle: Open-back
- Ear Cushion Material: Synthetic velour
What's in the box
- HD 650 headphones
- 3-meter cable with 6.35 mm connector
- Flexible 6.35 mm to 3.5 mm adapter
- Documentations
When the music matters the most
The HD 650 reproduces the subtle details in your music with the same confidence as the highlights.
Features
Here are the reasons why?
- Hi-fidelity sound
- Open-back design
- 42mm transducers
- Luxurious comfort
- Detachable cable
The (high) definition of smooth
Expertly balanced acoustics, luxurious construction and timeless design.
The HD 650 delivers high-performance audio without the fuss. Loved by audiophiles for its smooth, detailed sound, it reveals the full potential of your favorite tracks. For hi-fi enthusiasts seeking an instant upgrade, the HD 650 hits the mark.
Smooth response and dimensional soundstage
Open earcups provide each and every soundwave ample room to expand as they would in nature.
The HD 650’s signature sound begins with precision-engineered acoustics. Its 42mm transducer and aluminum voice coil deliver balanced treble, rich lows, and natural mids—perfect for extended, critical listening. Each pair is precisely matched for consistent, mastering-grade sound without room interference.
Made with more in mind
Combines the best of modern transducer manufacturing with the attention to detail required to handle a wide variety of acoustic materials.
Crafted in Ireland with precision, the HD 650 offers rich detail, lasting comfort, and consistent performance worldwide. Its modular design makes maintenance easy, while every component—from velour pads to stainless steel mesh—ensures a premium, long-term listening experience.
It's all about connection
Comes with a detachable, impedance-matched cable, stereo connector with audiophile-standard plug and premium adapter.
The HD 650 includes a 9.8 ft detachable, impedance-matched cable with ultra-low capacitance and a 6.3mm plug—ideal for amps, players, and more. A 3.5mm adapter is also included for wider compatibility and flexible listening.
More Information
What you need to know
The sound of the HD 650 can be best described as ...
The HD 650 produces a perfectly neutral sound while still offering an intimate listening experience.
Which of these SOUND features does the HD 650 have?
- Sennheiser signature sound
- Neutral tuning
- 42 mm high-performance transducers
- Aluminum voice coil
- Open-back earcups
To connect to an audio source the HD 650 cable has what type of plug?
The unbalanced 6.35 mm plug lets you connect to a multitude of audio devices. A flexible 6.35 mm to 3.5 mm adapter is also included for additional connection options.
The HD 650 has an impedance of ...?
The HD 650 has an impedance of 300 Ω (Ohms) that is optimized to reproduce audio with greater detail and speed to unleash the potential of serious audiophile systems.
Which of these COMFORT features does the HD 650 have?
- Elliptical earcups
- Velour earpads
- Ergonomic headband
- Light weight chassis
- Detachable cables
Does the HD 650 include a balanced cable?
No, The HD 650 does not include a balanced cable however optional 4.4 mm and XLR-4 cables are available for purchase separately.
Does the HD 650 utilize channel matching?
Yes, Channel matching is used during production to provide excellent balance and superior imaging through matched acoustic systems.
Which of these CRAFTSMANSHIP features does the HD 650 have?
- German design and engineering
- Outstanding build quality
- Optimized airflow
- Channel matching
Where is the HD 650 designed and engineered?
The HD 650 is designed and engineered in Germany and made in our Audiophile Production facility in Ireland.
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