The sonic air and space of open-backed headphones, the lack of sonic leakiness of closed-back headphones. That’s an impossible dream, isn’t it?
Not according to Sennheiser. With the HD 620S, the company has introduced a closed-back design into what has, until now, been a range of open-backed headphones – and it’s done so with the express intention of offering all the sonic virtues of an open-backed configuration combined with the self-contained nature of the closed-back alternative.
