Sennheiser HD 650
Open-back circumaural headphones Sennheiser HD 650, designed for faithful and detailed music listening, intended for hi-fi enthusiasts.
Description
The Sennheiser HD 650 is an open-back circumaural headphone designed for demanding music listening. It follows in the footsteps of the HD 600, retaining its fundamental qualities while bringing improvements that further refine the sound rendering.
The open-back design of these headphones allows for pronounced spatial reproduction: the source of the listing describes a wide and deep soundstage, with a sense of air around the instruments. The treble is described as dynamic and free, while the bass is presented as deep without artifice. This open architecture, typical of Sennheiser's high-end headphones of this generation, promotes a sound perceived as natural rather than artificially emphasised.
This type of headphone is intended for stationary use in a quiet environment, since the open-back design lets ambient sound through and does not isolate the listener from outside noise. It is particularly suited to attentive music listening, in a home studio or a living room dedicated to audiophile listening, rather than on the move or in noisy settings.
Technical specifications
| Type | Open-back, dynamic |
| Configuration | Circumaural |
| Impedance | 300 Ω |
| Sensitivity | 103 dB (1 V) |
| Connectors | 6.35 mm (1/4 inch) stereo jack |
| Length | 3 m |
| Weight | 260 g |
What to check before buying used
Check the condition of the HD 650's ear pads and headband cushion: after several years, the foam compresses or crumbles and the synthetic leather cracks, which affects comfort and acoustic seal. Also check the flexibility and continuity of the detachable cable as well as the cleanliness of the connectors at the earcups. Finally, listen to each side separately to rule out any level imbalance or crackling related to the transducers.
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