PSB M4U 8 headphones review: Very fine noise-cancelling Bluetooth headphones

Paul Barton, founder and chief designer of PSB Speakers, has a well-deserved reputation for creating many superb speakers over the last four decades. When he turned his attention to headphones in 2011, the result was the critically acclaimed M4U 2 over-ear model with active noise cancellation (ANC). Since then, PSB has introduced several iterations of this