The frequency response differs (30 - 20.000 Hz vs 18Hz - 25KHz), which can influence how well the headphones reproduce lows, mids, and highs. Overall, both headphones are feature-rich and cater to users looking for a combination of sound quality, comfort, and wireless convenience. Both models support modern Bluetooth connectivity, ensuring stable wireless performance with compatible devices. Impedance levels vary (400 ohm vs 35 ohm), which can affect compatibility and audio output when used with different devices. There is a noticeable difference in weight (390 g vs 240 GM), which may affect comfort during extended use. Both headphones offer solid battery performance, making them suitable for long listening sessions and travel. If you're comparing Beyerdynamic DT 109 Series and Audio Technica ATH-AVA400, both models offer a strong combination of sound performance, comfort, and modern wireless features. The driver size differs between the two (NA vs 40 mm), which can influence sound depth, bass response, and overall audio clarity. Beyerdynamic DT 109 Series and Audio Technica ATH-AVA400 offer different noise cancellation capabilities (NA vs Sound Isolation), which can impact how effectively they block external noise.

Verdict: Choosing between Beyerdynamic DT 109 Series and Audio Technica ATH-AVA400 depends on whether you value better sound, longer battery life, or enhanced features.