M4U 9

About the M4U 9

The PSB M4U 9 represents the pinnacle of PSB's wireless headphone performance, combining award-winning 'true-to-nature' sound signature with cutting-edge adaptive audio technologies. These premium headphones feature all-digital active noise cancelling utilizing 4 digital MEMS microphones to minimize audio conversion errors, paired with 6 additional microphones for crystal-clear voice capture via cVc technology. The innovative Audiodo Personal Sound technology allows independent calibration of left and right ear channels through a hearing assessment, creating a personalized compensation curve that accommodates unique hearing characteristics. PSB's proprietary RoomFeel tuning recreates the experience of listening to high-quality speakers in an acoustically optimized room by mimicking natural room gain, delivering an open and spacious soundstage rather than an 'in-head' listening experience. The headphones offer three listening modes via physical switch: ANC with RoomFeel, Active with RoomFeel, or Passive mode, with adjustable transparency levels. Designed for extended comfort during all-day listening, the gyro-suspended earpads are tilted at 15 degrees for ergonomic support, while the expandable headband features a fabric inner cover. The M4U 9 supports both wireless and wired operation, making it suitable for critical listening, gaming, streaming, travel, and daily use.