Product Details

Premium Wireless Active Noise Cancelling Headphones.

PSB’s award-winning wireless active noise cancelling headphones are reborn as the M4U8 MKII with exciting feature upgrades. Enhanced battery life and the latest noise cancelling technology will improve mobile listening, while Audiodo Personal Sound will compensate for your unique hearing abilities, letting you fully experience PSB Speakers’ renowned sonic signature. Work or play, PSB Speakers’ headphones are designed for comfortable and noise-free extended listening.

  • High-performance wireless noise cancelling headphones
  • PSB’s award-winning “true-to-nature” sound signature
  • All-digital adaptive noise cancelling (ANC) for pure noise-free listening
  • Custom audio calibration with Personal Sound by Audiodo™

Sound tailored to you
No two people hear the same — hearing will even differ between the left ear and the right ear in the same person. Many factors affect hearing, including the shape and size of ears and ear canals, as well as damage to cilia from loud noises or infection. These combined with personal preferences and everyone’s unique neurological patterns means that the sophistication of human hearing as a sense is often taken for granted. Through a series of audio tests and questions, Audiodo’s Personal Sound technology quickly creates a personal hearing profile for you that compensates for anomalies in sound perception and hearing abilities, allowing you to fully reveal the True-to-Nature sound signature PSB Speakers is known for.

A full-featured app allows you to personalize your listening experience and keep your headphones updated with the latest firmware updates and codecs. Adjust the sound of your headphones to fit your personal hearing profile using Audiodo’s breakthrough Personal Sound technology and customize the sound settings to your preferences and environment. Track your battery status, access user manuals, and control the devices your headphones are connected to.

Behind RoomFeel technology
Designing headphones and designing speakers are different disciplines, and while many companies use similar criteria for speakers meant for in-room listening as for the speakers clamped onto the sides of your head, PSB takes a different approach. With the latest generation of its groundbreaking RoomFeel technology, PSB uses precisely designed target curves to recreate the experience of in-room hi-fi listening in headphones. Based on seminal research in the field of psychoacoustics, while also designing around the listening fatigue that is often associated with active noise cancellation technologies, the M4U 8 MKII offers a natural listening experience even during long journeys, binge-watching sessions, or marathon work days.

Block out the noise
The M4U 8 MKII features an all-new, all-digital signal path design that ensures state-of-the-art active noise cancelling capabilities, cutting down the number of conversion steps required in the audio chain to keep it clean and noise-free. External sounds are detected, analyzed, and cancelled out in nanoseconds across the widest possible frequency and decibel ranges. Highly sensitive Knowles MEMS microphones cut down on system noise to deliver crystal clear call quality, while aptX HD Bluetooth makes your music sound like it is being piped straight from the studio.

True comfort, portability and functionality.
Toggle easily between passive active, and active noise cancelling modes to suit your environment using the physical switch on the headphones, and fine tune the settings with the intuitive PSB Headphones Control app. Ergonomically designed, soft-foam earcups and top-quality materials in the headband allow for full comfort listening, even during marathon calls or travels. Extended battery life — trackable using the PSB Headphones app — delivers up to 50% more listening time over the previous generation M4U 8.

  • High-performance wireless noise cancelling headphones
  • PSB’s award-winning “true-to-nature” sound signature
  • All-digital adaptive noise cancelling (ANC) for pure noise-free listening
  • Custom audio calibration with Personal Sound by Audiodo™
  • New PSB headphone app for more control and personalization
  • Up to 25 hours of battery life for all-day wireless playback
  • Powerful rechargeable battery with a USB C charger
  • Compatible with iOS and Android devices


Frequency Response

LF Cutoff -10dB 10-20,000Hz
LF Cutoff -3dB 15-20,000Hz
Within ±1 1/2dB 20-20,000Hz

THD, total harmonic distortion

ANC: ON (1kHz/1mW) 0.5%
ANC: OFF (1kHz/1mW) 0.25%

Power Handling

Maximum 30mW


Passive 32 Ohms


Type Dynamic
Operating Principle Closed
Size 40mm

Ear Coupling

Ear Coupling Circumaural


Connection 1/8” * (3.5mm) Stereo Jack (Left or Right)

Bluetooth aptX® HD, AAC

Cables Standard Cable - 2m (78 3/4") Detachable Tangle-free

USB Cable - 2m (78 3/4") Detachable Tangle-free

Battery Life

Wireless Active Mode 25 hrs
Wireless ANC Mode 18 hrs


Headband Spring Steel
Driver Enclosure ABS + Polycarbonate
Earpads/Headpad Cover Leatherette
Travel Case EVA

Dimensions / Weights / Finish

Overall 7 7/8 x 7 7/8 x 2 7/8 (200 x 200 x 70mm) (Travel Case)
Ear Cushion Outside 2 3/4 x 3 7/8 x 3/4” * (68 x 98 x 17mm)
Weight 12oz (342g) with cable
Finish Jet Black
Notes * Non-metric measurements are approximate.

All specifications are subject to change without notice.

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