Tested using Methodology v1.5
Updated Apr 02, 2024 10:53 PM
Tested using Methodology v1.6
Updated Jun 09, 2025 09:04 PM
Sennheiser HD 650
Sennheiser HD 660S2
The Sennheiser HD 650 are slightly better audiophile headphones than the Sennheiser HD 660S2. The HD 650 are more comfortable and have a more neutral sound profile, which some users may prefer. Their passive soundstage is more immersive too. However, the HD 660S2 have more bass, which is good if you like more thumpy and rumbly genres.