Koss QZ900 vs Audio Technica ATH-M50x – Key Differences & Best Choice (2026)

- Revolutionary Active Noise Reduction (ANR) headphone system reduces harmful and annoying low frequency sounds in noisy environments - Closed leatherette ear cushion for added passive noise reduction - Cord unplugs to enjoy passive and active noise cancellation wirelessly - Straight single-entry 4 foot cord with in-line volume control - Fold flat for portability; carrying case included - Covered under the Koss Stereophones Limited Lifetime Warranty

Collapsible for space-saving portability. 90Â° swiveling earcups for easy, one-ear monitoring. Professional-grade earpad and headband material delivers more durability and comfort. Top choice for studio tracking and mixing, as well as DJ monitoring and personal listening. Critically acclaimed sonic performance praised by top audio engineers and pro audio reviewers. Exceptional clarity throughout an extended frequency range, with deep, accurate bass response. Circumaural design contours around the ears for excellent sound isolation in loud environments. Detachable cables ( includes 1.2 m - 3.0 m coiled cable, 3.0 m straight cable and 1.2 m straight cable ). Proprietary 45 mm large-aperture drivers with rare earth magnets and copper-clad aluminum wire voice coils.

Key Differences

Impedance levels vary (38 ohm vs 32 Ohms), which can affect compatibility and audio output when used with different devices. Overall, both headphones are feature-rich and cater to users looking for a combination of sound quality, comfort, and wireless convenience. There is a noticeable difference in weight (285 GM vs NA), which may affect comfort during extended use. The driver size differs between the two (45 mm vs NA), which can influence sound depth, bass response, and overall audio clarity. Both models support modern Bluetooth connectivity, ensuring stable wireless performance with compatible devices. The frequency response differs (15Hz - 28KHz vs 20 Hz - 20000 Hz), which can influence how well the headphones reproduce lows, mids, and highs. Both headphones offer solid battery performance, making them suitable for long listening sessions and travel. If you're comparing Audio Technica ATH-M50x and Koss QZ900, both models offer a strong combination of sound performance, comfort, and modern wireless features. Audio Technica ATH-M50x and Koss QZ900 offer different noise cancellation capabilities (Sound Isolation vs Yes), which can impact how effectively they block external noise.

Verdict: Both models are competitive, and your decision should be based on your usage needs and preferred features.

Top Differences

Noise Cancelling: Sound Isolation vs Yes
Driver Size: 45 mm vs NA
Weight: 285 GM vs NA
Impedance: 38 ohm vs 32 Ohms

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Key Differences

Top Differences