Best STUDIO Headphones Under $50! - Superlux HD-660 Pro Review

A simple and quick review of the Superlux HD-660 Pro headphones. Links to buy the headphones and support us at the same time: Superlux HD-660 Pro (32 Ohms): USA: CA: EU & International: Superlux HD-660 Pro (150 Ohms): EU & International: DIY-Audio-Heaven website: