description Sennheiser HD 660S2 Overview
The Sennheiser HD 660S2 is a closed-back headphone featuring 44mm metal-dome drivers and a detachable cable, delivering a balanced sound signature with enhanced bass response for detailed audio reproduction at high volumes.
help Sennheiser HD 660S2 FAQ
Are the Sennheiser HD 660S2 open-back or closed-back headphones?
They are open-back headphones, so they provide little isolation and leak sound into the room. They are designed primarily for quiet home listening rather than commuting or recording beside a live microphone.
Does the HD 660S2 need a headphone amplifier?
Its impedance is 300 ohms, so a capable headphone output is advisable for adequate volume and dynamic headroom. Some laptops and audio interfaces can drive it, but weaker phones and dongles may not.
What changed from the HD 660 S to the HD 660S2?
The HD 660S2 extends the low-frequency response and raises impedance from 150 to 300 ohms. It retains the familiar open-back design and detachable dual-entry cables of Sennheiser's HD 600 family.
Which cables are included with the HD 660S2?
It is supplied with detachable cables terminating in a 6.35 mm plug and a balanced 4.4 mm plug. A 6.35-to-3.5 mm adapter is also included for smaller headphone sockets.
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