If you're comparing Denon AH-D340 and Koss R80, both models offer a strong combination of sound performance, comfort, and modern wireless features. The frequency response differs (7Hz - 37,000Hz vs 16 Hz - 22000 Hz), which can influence how well the headphones reproduce lows, mids, and highs. There is a noticeable difference in weight (250 g vs NA), which may affect comfort during extended use. The driver size differs between the two (40 mm vs NA), which can influence sound depth, bass response, and overall audio clarity. Impedance levels vary (36 Ohms vs 60 Ohms), which can affect compatibility and audio output when used with different devices. Both models feature noise cancellation, helping reduce background noise for a more immersive listening experience. Overall, both headphones are feature-rich and cater to users looking for a combination of sound quality, comfort, and wireless convenience. Both headphones offer solid battery performance, making them suitable for long listening sessions and travel. Both models support modern Bluetooth connectivity, ensuring stable wireless performance with compatible devices.

Verdict: Choosing between Denon AH-D340 and Koss R80 depends on whether you value better sound, longer battery life, or enhanced features.