PSB M4U 8 MkII Wireless Noise Cancellation Headphone

A Refined Second Generation of PSB's Signature Headphone

The PSB M4U 8 MkII is a closed-back wireless headphone built around a 40mm dynamic driver, refining the original M4U 8 with better battery life, Active Noise Cancellation, and PSB's own RoomFeel tuning technology.

A three-position switch covers ANC, Active (non-ANC electronics on), and fully Passive listening, so the M4U 8 MkII keeps working as a standard wired headphone even with a completely dead battery.

The free PSB Headphones app unlocks Audiodo Personal Sound calibration, tuning the headphone's response to your own hearing profile — a genuinely useful feature, though it does mean the app isn't optional if you want the full experience.

Where RoomFeel Tuning Earns Its Keep

A 40mm Driver, Tuned for Closed-Back Clarity

The 40mm dynamic driver runs at 32 ohms passive impedance, low enough to drive comfortably from a phone or laptop headphone jack while still giving PSB's engineers room to tune the closed-back cavity for a natural, uncolored sound.

RoomFeel technology adjusts the headphone's frequency response to compensate for the artificial bass buildup that closed-back designs can create sitting directly against the ear, aiming for a more speaker-like presentation.

Three-Position Switch: ANC, Active, or Fully Passive

Flip to ANC for maximum quiet, Active for the onboard amplifier without noise cancellation, or Passive to run the M4U 8 MkII as a completely battery-free wired headphone through its 3.5mm or USB-C connection.

Bluetooth pairing supports AAC and aptX HD codecs, and the rechargeable battery delivers up to 25 hours in Active mode or 18 hours with ANC engaged, a real jump over the original M4U 8's battery life.

What Reviewers Are Saying

What Hi-Fi? found the MkII produces "a nice, clear midrange with a good soundstage and no part of the musical mix overly prominent," calling out "improved battery life" as a genuine upgrade over the original.

Who Is the PSB M4U 8 MkII Best For?

• You want a headphone tuned to your own hearing: Audiodo Personal Sound calibration through the free PSB app adjusts the response specifically for you
• You want a true battery-free fallback: the Passive switch position works over a wired connection with zero power at all
• You want genuinely improved battery life over the original M4U 8: up to 25 hours Active or 18 hours with ANC on
• You want both USB-C and 3.5mm wired options: either connection works in Active or Passive mode
• You want PSB's proven driver with full connectivity and battery life — the M4U 8 MkII, at a lighter weight

How Does It Connect to Your System?

Pair over Bluetooth from a phone, tablet, or computer using AAC or aptX HD, or connect the included 3.5mm or USB-C cable directly for a wired connection in either Active or Passive mode.

Download the free PSB Headphones app to run Audiodo Personal Sound calibration and adjust RoomFeel settings — the headphone plays music without it, but the personalization features specifically require it.

Pairs Well With

What finishes the system around a PSB M4U 8 MkII:

• Headphone amplifiers — for driving the M4U 8 MkII in passive mode from a home system
• Headphone cables — a spare or longer cable for wired listening
• Headphone stands — a proper resting spot between listening sessions
• Headphone accessories — replacement earpads keep the M4U 8 MkII fresh over years of use

Frequently Asked Questions

Do I need the PSB app to use these headphones?

Not for basic playback. The app is required specifically for Audiodo Personal Sound calibration and RoomFeel adjustments, PSB's two signature personalization features.

Does the M4U 8 MkII work with a dead battery?

Yes, in the Passive switch position. Connect a 3.5mm or USB-C cable and it runs as a standard wired headphone with zero power required.

How long does the battery last?

Up to 25 hours in Active mode, or 18 hours with ANC engaged, both genuine improvements PSB made over the original M4U 8.

Which Bluetooth codecs does it support?

AAC and aptX HD. Codec availability depends on your source device, since aptX HD needs a compatible Android device rather than an iPhone.

How is this different from the M4U 9?

The M4U 9 uses a graphene-infused driver and supports aptX Adaptive instead of aptX HD; the M4U 8 MkII shares the same battery life and connection options at a lighter weight.

See It in Action

David Susilo Unscripted reviews the M4U 8 MkII and walks through Audiodo setup:

PSB Speakers presents PSB M4U 8 MKII Wireless Headphones - Reimagined For You.

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Learn More

Want to learn more about wireless headphones, Bluetooth codecs, or getting the most from an ANC design? Visit our Learning Center for guides, tips, and expert advice.