If you're comparing JBL LIVE 500BT and JBL Quantum 400, both models offer a strong combination of sound performance, comfort, and modern wireless features. Both models support modern Bluetooth connectivity, ensuring stable wireless performance with compatible devices. 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 headphones are equipped with capable drivers that deliver balanced sound output suitable for music, calls, and entertainment. JBL LIVE 500BT and JBL Quantum 400 offer different noise cancellation capabilities (Active vs NA), which can impact how effectively they block external noise. The frequency response differs (18 Hz - 20000 kHz vs 20 Hz - 20000 kHz), which can influence how well the headphones reproduce lows, mids, and highs. There is a noticeable difference in weight (231.6 gm vs 274 gm), which may affect comfort during extended use.

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