Key Differences

In general, both options are suitable for everyday use including music, calls, travel, and work-from-home scenarios. Both models feature noise cancellation, helping reduce background noise for a more immersive listening experience. The driver size differs between the two (NA vs 40 mm), which can influence sound depth, bass response, and overall audio clarity. Beyerdynamic T 51 P and Koss Pro4s are premium wireless headphones designed to deliver high-quality sound along with advanced features like noise cancellation and long battery life. There is a noticeable difference in weight (174 g vs NA), which may affect comfort during extended use. Both models support modern Bluetooth connectivity, ensuring stable wireless performance with compatible devices. The frequency response differs (10 Hz - 23000 Hz vs 10 Hz - 25000 Hz), which can influence how well the headphones reproduce lows, mids, and highs. Impedance levels vary (32 Ohms vs 35 Ohms), 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.

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