JBL has really stepped up is game today with the introduction of its new Synchros line of on-ear and over-ear headphones that consists of two powered over-ear headphones - the S700 (right), S500 as well as an on-ear pair called the S300 (left). Notably however, is JBL's flagship S700 headphones which are said to offer professional sound performance, robust build quality and comfort with a $350 price tag. The S700 feature a die-cast aluminum frame, acoustic ear cup design with leather cushions and woven cordura accents, LiveStage DSP for a life-like soundstage, 50mm drivers with JBL's proprietary PureBass technology that deliver deep, rich lows, detachable audio cable with an in-line 3-button remote and mic, and a built-in rechargeable battery to power all that hardware and technology. Surprisingly though, none of JBL's new headphones have active noise-cancellation. Jump past the break for the full details on each pair.