The HD 620S are something of a departure for Sennheiser, which has traditionally stuck with open back headphone designs. The move was prompted by customer feedback, according to the company. “The hi fi community has clamored for a headphone with the best traits from our 600 series,” said Jermo Koehnke, audiophile product manager, “yet isolates them from distractions at work, home, or in between.” The HD 620S is an attempt at doing just that: preserving the airy sense o
