Open-Box PSB M4U 8 MkII Wireless Noise Cancelling Headphones - Brown - Mint Condition

Inspection-Only Unit with Full Warranty

• Brand/Model/Finish: PSB M4U 8 MkII - Brown with Chrome Accents
• Condition: Open-box mint condition, opened for inspection only
• Retail: Original MSRP $399 for value context
• Configuration: 40mm dynamic drivers, aptX HD Bluetooth, RoomFeel technology, Personal Sound calibration
• What's Included: Complete with semi-hardshell case, USB-C cable, 3.5mm cable, ¼" adapter, airplane adapter, all documentation
• Warranty: Full 2-Year PSB manufacturer's warranty

From Speaker Legends to Personal Audio Excellence

PSB Speakers emerged from Canadian acoustics pioneer Paul Barton's obsession with natural sound reproduction. For over five decades, Barton has conducted his research at Canada's National Research Council in Ottawa, the same facility where the world's most accurate speaker measurements are performed. This scientific approach created speakers that disappear, leaving only music.

When Barton turned his attention to headphones, he asked a simple question: why don't headphones sound like speakers? His answer revolutionized personal audio. PSB's RoomFeel technology recreates the warmth and dimensionality of hearing reference speakers in an acoustically treated room. The M4U 8 MkII represents the pinnacle of this innovation - headphones that sound nothing like headphones.

Revolutionary Technologies That Redefine Wireless Listening

• RoomFeel Acoustic Processing: Mimics the natural power response of high-quality speakers in a treated room, eliminating the "inside your head" effect typical of headphones
• Personal Sound by Audiodo: Advanced hearing calibration creates a custom EQ profile based on your unique hearing, compensating for any frequency gaps
• All-Digital Signal Path: Eliminates multiple conversion stages that degrade sound, maintaining pristine clarity from source to ear
• Gyro-Suspended Earpads: Angled at 15 degrees and self-adjusting for perfect seal and comfort during marathon listening sessions
• Adaptive Noise Cancellation: Digital ANC effectively removes low-frequency drone while maintaining musical transparency

What the Golden Ears Are Saying

"PSB has succeeded in improving the original headphones... They produce a more lively and cleaner sound. The M4U 8 MKII are good performers that deliver remarkable clarity and natural presence." - What Hi-Fi?

"The sound quality of the headphones is excellent for the price point and rivals the audio quality of offerings that cost several hundred dollars more. Those looking for stunning midrange and bass responses can end their search." - CE Pro Review

"Constantly impressed with the natural sound of voices and instruments. The bass is fantastic, deep but not boomy. This seems to be a PSB trademark." - PSB Customer Review

Engineering Excellence by the Numbers

• Drivers: 40mm dynamic drivers with precision tuning
• Frequency Response: 10Hz - 23kHz
• Impedance: 38 ohms nominal
• Sensitivity: 99.8dB @ 1mW
• Battery Life: 25 hours (ANC off), 20 hours (ANC on)
• Bluetooth Codecs: aptX HD, AAC, SBC
• Connections: Bluetooth 5.0, 3.5mm analog, USB-C digital
• Controls: Physical buttons for reliability (no finicky touch controls)
• Weight: 362g

What Makes the M4U 8 MkII Special

These aren't just another pair of noise-cancelling headphones chasing the Bose and Sony market. PSB approached wireless headphones like they approach speakers - with scientific rigor and an uncompromising commitment to natural sound. The result is headphones that excel where others fail: speech intelligibility in movies, instrument separation in complex orchestral passages, and that elusive quality of making digital music sound analog.

The Personal Sound calibration is a game-changer for anyone over 30 or with asymmetric hearing. Rather than generic tuning, these headphones adapt to your specific hearing profile. Combined with RoomFeel's speaker-like presentation, you're hearing music as the artist intended, compensated for your unique physiology.

Perfect For:

Audiophiles seeking speaker-quality sound in portable form, movie enthusiasts demanding crystal-clear dialogue, commuters requiring effective noise cancellation with musical transparency, listeners with hearing variations seeking personalized calibration, anyone choosing sound quality over brand recognition.

Open-Box Guarantee: This inspection-only unit is absolutely mint with zero signs of use. Includes complete original packaging and full manufacturer's warranty. Experience PSB's revolutionary approach to wireless audio at significant savings - where five decades of speaker expertise meets modern wireless convenience.