Open-back reference headphones
Sennheiser's long-running open-back reference headphone, known for neutral sound and a natural midrange. It needs a capable amplifier, and reviewers found the clamp firm.
-
Neutral sound
Reviewers found the tuning neutral, with a natural, detailed midrange and controlled bass. They found the soundstage somewhat closed-in for an open-back.
-
Needs an amplifier
It is rated 6 dB less sensitive than the HD 650 at the same impedance. Reviewers recommend a headphone amplifier or a DAC with a capable headphone output.
-
Modular construction
Most parts are modular, so the cable, ear pads and driver units can be replaced.