Wireless noise-cancelling headphones from PSB with aptX HD and AAC Bluetooth, an all-digital signal path, Audiodo Personal Sound hearing calibration and RoomFeel. PSB lists up to 25 hours in Active Mode.
PSB says the M4U 8 MKII is an upgrade to its wireless noise-cancelling headphones, with enhanced features, improved sound quality and advanced noise cancellation. It comes in Jet Black or Espresso Brown.
Why you will love it
aptX HD Bluetooth and noise cancellation
PSB says aptX HD Bluetooth gives exceptionally clear sound without significant loss during wireless transmission, and that the all-digital signal path simplifies audio conversion.
Sensitive microphones are there for calls, and you can switch between passive, active and noise-cancelling modes.


Audiodo Personal Sound
PSB says Audiodo Personal Sound measures your hearing abilities in the PSB Headphones app and builds a model of your hearing that the headphones compensate for.
RoomFeel
PSB says RoomFeel mimics the warmth and energy a room adds when you listen to high-quality loudspeakers, drawing on decades of its acoustic design knowledge.

Comfort and battery
Gyro-suspended earpads are tilted at 15 degrees, and the headband expands to fit. PSB lists up to 25 hours of Active Mode runtime, or 18 hours with ANC, and wired listening over 3.5mm or USB-C.
The PSB Headphones app shows battery status.
Is it right for you?
A great fit if you…
- Want wireless ANC headphones with a wired option
- Like to tailor sound to your own hearing in an app
- Travel or commute and want a hard travel case
Worth knowing
- Wireless battery life is 25 hours in Active Mode and 18 hours with ANC
- The earpad cover is leatherette
- The Jet Black and Espresso Brown finishes are separate options on this page
Build your system
The M4U 8 MKII works on its own over Bluetooth or by cable.
- Step up: The PSB M4U 9 adds graphene-infused drivers and aptX Adaptive.
- Earphones: See the PSB M4U TWM true wireless earphones.
- More headphones: Browse headphones.
Specifications
Sound
| Frequency response, LF cutoff -10dB | 10 - 20,000Hz |
|---|---|
| LF cutoff -3dB | 15 - 20,000Hz |
| Within ±1.5dB | 20 - 20,000Hz |
| THD, ANC on (1kHz/1mW) | 0.5% |
| THD, ANC off (1kHz/1mW) | 0.25% |
| Maximum power handling | 30mW |
| Impedance (passive) | 32 ohms |
| Transducer | Dynamic, closed, 40mm |
| Ear coupling | Circumaural |
Connection and battery
| Connections | 3.5mm stereo jack (left or right), Bluetooth aptX HD and AAC, USB-C |
|---|---|
| Cables | Standard cable 2 m, USB cable 2 m |
| Battery life, Active Mode | 25 hours |
| Battery life, ANC Mode | 18 hours |
Construction
| Headband | Spring steel |
|---|---|
| Driver enclosure | ABS and polycarbonate |
| Earpad cover | Leatherette |
| Travel case | EVA |
| Travel case size | 200 x 200 x 70 mm |
| Ear cushion outside | 68 x 98 x 17 mm |
| Weight | 342 g with cable |
| Finish | Jet Black or Espresso Brown |
Specifications from PSB's M4U 8 MKII product page (PSB Canada), checked November 2026.
Questions people ask
Does it have noise cancelling?
Yes. PSB lists active noise cancellation, with passive, active and noise-cancelling modes.
Which Bluetooth codecs does it use?
PSB lists aptX HD and AAC.
How long does the battery last?
PSB lists 25 hours in Active Mode and 18 hours in ANC Mode.
Can I use it with a cable?
Yes. PSB lists a 3.5mm connection and a USB-C connection, with a 2 m cable for each.
What colours are there?
Jet Black and Espresso Brown.