Shure AONIC 50 Gen 2 vs Sennheiser HD 620S

These are different tools. The Shure AONIC 50 Gen 2 is a wireless, noise-cancelling travel and work headphone with a 45-hour battery, six call microphones and spatial audio. The Sennheiser HD 620S is a passive, wired closed-back headphone with 150-ohm impedance, a 6 Hz to 30 kHz range and very low distortion, built for clean listening at a desk. Buy the Shure for portability, calls and quieting a plane or office; buy the Sennheiser for wired sound quality from a good source. Owners praise the Shure's comfort and battery but note its size and lack of folding; the Sennheiser is heavier at 350 g and needs a decent amp to sound its best.

• Choose the Shure AONIC 50 Gen 2 if you want one wireless headphone for travel, calls and noisy rooms, with long battery life and codec support for LDAC and aptX Adaptive.
• Choose the Sennheiser HD 620S if you listen wired at a desk from a phone with a dongle or a dedicated amp and want a closed-back headphone tuned for detail and low distortion.