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PSB M4U TW1 Bluetooth Earbuds Preview



  • Product Name: M4U TW1 In Ear Monitor
  • Manufacturer: PSB
  • Review Date: February 06, 2018 00:00
  • MSRP: $149
  • First Impression: Gotta Have It!
  • Frequency Response: 20Hz-20KHz
  • THD, total harmonic distortion: 0.25% (1kHz/1mW)

  • Transducer Type: Dynamic

  • Operating Principle: Sealed

  • Size: 6mm
  • Ear Coupling
  • Connection

  • Bluetooth version: Bluetooth V4.1

  • Bluetooth profiles:  A2DP and AVRCP

  • Operating distance: 10 meters

  • Music time: 4.5 hours

  • Talk time: 5 hours

  • Standby time: 80 hours

  • Charging time: 2 hours

  • Dimensions (W+H+D):  2 5/32” x 1 3/8” x 29/32”

  • Weight:  .14 oz

There are some truly amazing products that are introduced at CES every year from drone taxis for people to self-propelled suitcases that follow you wherever you go. Then there are products that take a good idea and make it better in the case of the PSB M4U TW1 Bluetooth earbud. Although it’s been 20 years since the advent of Bluetooth, each year the technology gets better and better. Sure, you can easily go out and purchase a pair of Apple airpods for around $159 like 85% of the other people who bought wireless headphones last year, but that would not be in form or factor of a true Audioholic! We don’t buy what’s trendy or hip, but what actually sounds amazing.

 If the PSB M4U TW1 Bluetooth earbuds come up to the sound standards of their over ear headphones, then the $149 price tag will be quite a deal. The M4U TW1’s has a unique shape and soft rubber material that should provide long-lasting comfort.  The TW1 is Bluetooth enabled to connect to any other Bluetooth compliant device. It also comes with a high-clarity mic and one-touch sensitive button to play/pause, skip tracks and answer calls. And since it has the advanced A2DP version of Bluetooth wireless the M4U TW1 should provide fast and seamlessly pairing with any device, and delivers extended range, fewer drop-outs and better battery life.


The TW1 comes with a unique earhook design combined with a set of soft and comfortable silicone ear tips, the M4U TW1 allows you to customize its fit to stay put while running, biking or at the gym.

The M4U TW1 looks to be a heavy hitter in the sound department housing high-performance 6mm drivers. We really like the fact that these high-performance earphones are sweat and weather resistant and has a rechargeable lithium-ion battery that delivers up to five hours of listening. For added hands-free convenience, the M4U TW1 will notify you when you’re paired to a device or running low on battery by using voice prompts. As the first cordless earphones from PSB Speakers, the M4U TW1 is the result of over 40 years of advanced acoustic research done by renowned speaker designer, Paul Barton.

Unless otherwise indicated, this is a preview article for the featured product. A formal review may or may not follow in the future.

About the author:
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Tony is our resident expert for lifestyle and wireless products including soundbars. He does most of the reviews for wireless and streaming loudspeakers and often compares soundbars in round ups and helps us cover the trade shows.

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