The largest pair of the bunch is E50BT, the only over-ear headphones currently in the Synchros E line. On the outside, they’re substantially plastic that’s designed to resemble metal, although there is some real metal, too. Each cup has a ring of diamond-textured plastic surrounding a metal disc, bearing either the JBL logo on the right cup, or control buttons every 90 degrees on the left. The hinges that connect the cups to the headband…
