Sennheiser HD 505 open-back headphones: A new benchmark in affordable audiophile sound?

The HD 505 features a primarily black design with dark copper accents. I have to admit — I really dig the look.

Sennheiser HD 505 wired audiophile headphones, made in Tullamore. Picture: Noel Campion.

The Sennheiser HD 505 is a fresh addition to the company's esteemed open-back headphone lineup, and I’ve been testing them for the last few weeks. They’re manufactured in Sennheiser’s state-of-the-art factory in Tullamore and designed for audiophiles and casual listeners alike. With a custom 120-ohm transducer, an expansive frequency response of 12 to 38,500 Hz, and a total harmonic distortion of less than 0.2%, the HD 505 delivers a balanced and highly detailed listening experience.

Design and build quality