Both models feature noise cancellation, helping reduce background noise for a more immersive listening experience. Impedance levels vary (18 Ohms vs 48 ohm), which can affect compatibility and audio output when used with different devices. If you're comparing Sennheiser Momentum and Beyerdynamic DT 900 PRO X, both models offer a strong combination of sound performance, comfort, and modern wireless features. From a usability standpoint, both models provide a reliable and premium headphone experience. Both models support modern Bluetooth connectivity, ensuring stable wireless performance with compatible devices. Both headphones offer solid battery performance, making them suitable for long listening sessions and travel. The frequency response differs (16 Hz - 22,000 Hz vs 5 - 40,000 Hz), which can influence how well the headphones reproduce lows, mids, and highs. The driver size differs between the two (NA vs 45 mm), which can influence sound depth, bass response, and overall audio clarity. There is a noticeable difference in weight (190 g vs 345 g), which may affect comfort during extended use.

Verdict: Choosing between Sennheiser Momentum and Beyerdynamic DT 900 PRO X depends on whether you value better sound, longer battery life, or enhanced features.