Conclusion: PSB M4U 2 is a superb example of a premium headphone that does almost everything right. The headset provided good noise cancellation, a rich and brilliantly detailed sonic signature, and an impressive feature set, all bundled into one of the most comfortable pair of cans we’ve put on.
Pros: Excellent balance and instrumental separation, Brilliant detail and dynamic expression, Solid noise-cancelling, Deep feature set, Extremely comfortable
Summary: Had these for just over 2 months now and have a couple hundred hours with them. These are a very balanced headphone in terms of the frequency range they are capable of. Paul Barton (the man who designs PSB speakers) suggests this is 20-20,000 Hz @ ± 1.5 Hz, and I believe him.
Summary: A few weeks ago, I met a very nice gentleman who was a distributor of this product. I had never heard of PSB let alone the M4U 2 and I was given the opportunity to demo this product. A very big thanks to John of Lenbrook Asia for this opportunity.
On The Head
Isolation - average.
Pros: Noise Cancellation, Active, and still usable if batteries drain. Comes with lots of accessories
Summary: Just got my PSB M4U 2 headphones after a dilligent search for the right cans for my lifestyle. I am a "limited audiophile". Limited since my main genre is classic rock from the 60's and 70's. If you need a broader range of music style to consider, then please press on.
Summary: I've owned the Sennheiser Momentums, B&W P7's, and other mid-fi portable headphones but I prefer these in terms of sound quality only.
Why? These headphone's have such an organic/balanced representation of all the sound frequencies that it really sounds accurate/natural opposed to accurate/cold or...
Summary: Bought this PSB M4U2 for a few days now,, super happy and excited - bought it from a headphone store. ( Headphone Bar - w. boardway, Vancouver bc )
I always wanted a noise cancelling headphone with passive mode and uses batteries than stupid rechargeable ones..
Pros: Very detailed and well balance + good enough punchy bass ( I love the amp mode ) Stylish ,,but bulky looking
Summary: Warning: See Update (2014-12-15) below.
First, a disclaimer. My Head is of an above average size. 7 3/4 (XXL)
These headphones are very well made. In the world of plastic, it's nice to see headphones put together with metal and screws, though plastic is still heavily used.
Pros: Amazing active (NC off) sound quality. Full range response.
Cons: Not that comfortable for long periods. Active NC has weird distortion sometimes. Poor Internal build.