Key Differences

The driver size differs between the two (45 mm vs 38 mm), which can influence sound depth, bass response, and overall audio clarity. Beyerdynamic DT 1770PRO and Sennheiser HD 660S2 are premium wireless headphones designed to deliver high-quality sound along with advanced features like noise cancellation and long battery life. Both models support modern Bluetooth connectivity, ensuring stable wireless performance with compatible devices. Impedance levels vary (250 ohm vs 300 ohm), 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 (388 g vs 260 Gm), which may affect comfort during extended use. Both headphones offer solid battery performance, making them suitable for long listening sessions and travel. The frequency response differs (5 - 40 000 Hz vs 8 Hz -41500 Hz), which can influence how well the headphones reproduce lows, mids, and highs. Beyerdynamic DT 1770PRO and Sennheiser HD 660S2 offer different noise cancellation capabilities (NA vs AMBIENT), which can impact how effectively they block external noise.

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