Key Differences

Both headphones offer solid battery performance, making them suitable for long listening sessions and travel. Beyerdynamic DT 1770PRO and Sennheiser HD 660S2 offer different noise cancellation capabilities (NA vs AMBIENT), which can impact how effectively they block external noise. There is a noticeable difference in weight (388 g vs 260 Gm), which may affect comfort during extended use. Beyerdynamic DT 1770PRO and Sennheiser HD 660S2 are well-known options in the wireless headphone segment, offering a balance of audio quality, battery performance, and smart features. In general, both options are suitable for everyday use including music, calls, travel, and work-from-home scenarios. 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. Impedance levels vary (250 ohm vs 300 ohm), which can affect compatibility and audio output when used with different devices. The driver size differs between the two (45 mm vs 38 mm), which can influence sound depth, bass response, and overall audio clarity. 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.