Both the Sonorous II and III feature a 50mm driver that integrates with the front plate in an effort to reduce vibration, with the plate itself made from polycarbonate strengthened with 30% glass instead of the aluminium found on the high-end models. This naturally makes them a lot lighter (410g) and cheaper.
The new headphones have a closed-back design and full-size, noise-isolationg earcups, and come with a 1.5-metre detachable cable.
The two new models have the same design and styling but have been tuned for a slightly different musical delivery. The Sonorous II keeps things analytical and flat across the frequency range, while the III aims to be a little more entertaining, adding some sparkle to the top end and a bit more punch to the bass.