Audio-Technica ATH-AD900X vs Pioneer SE-NC21M

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

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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The device comes with its own special case or pouch, which is useful for safe transportation.

Foldable devices are easier to transport and take up less storage space.

This device comfortably rests on top of your outer ears. As it doesn't block out everything from the outside world, it's preferred in places like office environments and recommended for outdoor activities.

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

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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. Show more

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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. Show more

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The driver unit is the component that produces sound in the device. Bigger drivers are more powerful and can produce better bass.

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This type of device allows you to listen at lower volume levels, causing less ear fatigue as you don't have to crank up the volume to overcome background noise. Ideal for plane rides and morning commutes.

The battery is removable and can be replaced by the user if broken. Show more

A standard 3.5mm male connector is suitable for use with all MP3 players and computer sound cards.