Marshall’s new Mid A.N.C. marks the company’s first venture into active noise cancelling headphones, using four microphones to continuously measure and pinpoint ambient noise and block it out. The headphones boast “up to 20 hours” of wireless playback when active noise cancelling is engaged or more than 30 hours of wireless playtime without A.N.C. The headphones feature 3D metal hinges that rotate to provide a snug fit and…