In the audio community, the Sennheiser HD 650 is something of a legend – an excellent value headphone, it delivers exceptional audio quality without costing the earth. It is perhaps a bold move, then, for Sennheiser to release a successor to the much-loved HD 650, named the HD 660 S. With a price of £429, is this the new go-to headphone for budget audiophiles?
Instead of just re-tuning the HD 650 driver, the Sennheiser HD 660 S actually features an all-new transducer design and a lower impedance of just 150Ω. That means the HD 660 S is considerably easier to drive than its predecessor, giving it some extra versatility in that it can be easily used with portable music players. It’s still an open-back headphone, though, so not for use out and about, but it will sound better across a wider range of devices.
- Impedance: 150 Ω
- Connector: 6.35 mm / 4.4 mm Pentaconn
- Frequency response: 10 – 41,000 Hz (-10 dB)
- Sound pressure level (SPL): 104 dB at 1V 1kHz
- Ear coupling: Over-ear (circumaural)
- THD + N, total harmonic distortion and noise: < 0,04% (1 kHz, 100 dB)
- Transducer principle (headphones): Dynamic, open
- Weight w/o cable: Approx. 260 g (without cable)