Marshall has announced the Major 50 FX ($170), a new set of special edition headphones to commemorate the company’s 50th anniversary. The on-ear headphones feature 40mm moving coil dynamic speakers and are adorned with gold accents and the same fret detailing found in Marshall’s 50th anniversary line of amplifiers. An inscription of the company’s founding year and location is found on the headband, which is constructed from the same…