Sennheiser HD 559 review: specs and price

Devices with stereo speakers deliver sound from independent channels on both left and right sides, creating a richer sound and a better experience.

With a detachable cable you can use alternative cables, and if the cable is pulled it will pop out instead of breaking.

Comfortable full-size form with earcups that fully enclose your ears. This model is loved for its increased sound isolation and the fact that it won't leak sound to your neighbors. It offers potential for maximum bass and loudness levels.

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Folding devices are good for transporting as they take up less space in your bag.

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A straight plug is better when the jack is on the top or bottom of your player.

The highest frequency at which device produces audio. The higher the high-frequency response, the clearer and crispier the treble.

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The lowest frequency at which the device produces audio. The lower the low-frequency response, the stronger and juicier the bass.

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Devices with a higher sound pressure level are generally louder when supplied with any given audio source.

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Impedance is the device’s electrical resistance to the current being pushed through it. The lower the impedance, the easier it is to get higher volume and requires less power.

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Wireless devices allow users more freedom of movement.

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When covered under the manufacturer’s warranty it is possible to get a replacement in the case of a malfunction.

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