Sennheiser HD 660S2 Audiophile Open Back Headphones

Dive deeper into legendary sound

These over-ear headphones' open-back design and ultrasoft velour earcups ensure extreme comfort during extra-long sessions and perfectly channel-matched drivers within ±1 dB provide a truly intimate, high-fidelity listening experience. The HD 660S2 comes with two detachable cables in 1/4" unbalanced and 4.4mm balanced flavours, and the headphones also include a handy 1/4" to 3.5mm adapter and a convenient carry pouch.

Double the sub-bass
Sub bass expands the entire sound. In doubling the sound pressure at the lowest frequencies, Sennheiser has retained extraordinary precision and balance throughout the sub-bass, mid-bass, and beyond. Extension on the low-end changes everything by creating more space for the sound. Against a deeper backdrop, highs feel more brilliant, the soundstage deeper, and the emotions stronger.

New voice coil and optimized airflow system
Outside your pair of HD 660S2 headphones, you’ll find a steel mesh that perfectly complements the ventilated driver, providing pure diaphragm travel and tighter production tolerances that combine for reduced turbulence and expansive, natural sound. On the inside, an ultra-light aluminium voice coil with 300 ohms of impedance delivers ultra-quick impulse response. And the improved airflow of the 660S2 magnet’s air gap results in better reproduction across the entire frequency spectrum.

Main Features:

• Audiophile-grade headphones with liquid-smooth response and effortless instrument reproduction
• Double the sub-bass frequencies of their predecessors makes for an improved listening experience across the entire spectrum
• Open-back design with steel mesh over uniquely optimized airflow system makes for natural sound devoid of turbulence and distortion
• 38mm transducer offers revealing, tack-sharp detail demanded by modern audiophiles
• Excellent balance and superior imaging through matched acoustic systems
• Lightweight, durable design and replaceable padded ear cups make for a comfortable listening experience for hours or minutes
• Ultra-light Duofol aluminium voice coil with 300ohms of resistance delivers ultra-quick impulse fidelity
• Comes with carry pouch, a 1/4-inch plug and 4.4mm balanced plug (both with 1.8 meter long cables), and a 1/4-inch to 3.5mm adapter

Tech Specs:

• Type: Wired
• Open/Closed: Open
• Fit Style: Circumaural (Around the Ear)
• Driver Size: 38mm
• Frequency Response: 5Hz-41.5kHz
• Impedance: 300 ohms
• Connectivity: 1/4" plug, 1/8" adapter
• Cable Type: Straight
• Cable Length: 1.8 meters
• Detachable Cable: Yes
• Colour: Black
• Material: Velour Earpads
• Case/Bag: Carry Pouch
• Discover more Sennheiser [HD 660S2]: https://www.sennheiser-hearing.com/en-US/p/hd-660s2/