The frequency response differs (5 Hz - 37,000 Hz vs 5 Hz - 25000 Hz), which can influence how well the headphones reproduce lows, mids, and highs. If you're comparing Denon AH-D400 and SHURE SRH840A, both models offer a strong combination of sound performance, comfort, and modern wireless features. The driver size differs between the two (50 mm vs 40 mm), which can influence sound depth, bass response, and overall audio clarity. Impedance levels vary (32 Ohms vs 40 ohm), which can affect compatibility and audio output when used with different devices. Both headphones offer solid battery performance, making them suitable for long listening sessions and travel. From a usability standpoint, both models provide a reliable and premium headphone experience. There is a noticeable difference in weight (310 g vs 273 Gm), which may affect comfort during extended use. Denon AH-D400 and SHURE SRH840A offer different noise cancellation capabilities (NA vs CVC), which can impact how effectively they block external noise. Both models support modern Bluetooth connectivity, ensuring stable wireless performance with compatible devices.

Verdict: Both headphones offer strong performance, and the right choice depends on your priorities such as battery life, comfort, and noise cancellation.