In case you've never heard of KEF, it's a British company that makes premium speakers that generally sound really good. Those speakers tend to be a bit pricey -- and some are very pricey -- but now the company has made a foray into the headphone market with two new models, the $200 M200 Hi-Fi Earphones reviewed here and the $300
Frankly, I had a bit of a hard time reviewing these headphones. As you can see, they have a pretty unique design. They're large for an in-ear model and that's because they have two drivers jammed into their aluminum housings.
The larger, 10mm driver is dedicated to low frequencies and the smaller, 5.5mm driver is dedicated to highs and mids. That's all great -- and the headphones sound impressive, with accurate, detailed sound. They really are an audiophile headphone and in terms of sound they can hold their own against most in-ear models in this price class.
But the fit was a problem for me. I have somewhat smaller ears and the housing just wouldn't get past certain parts of my ear, so I couldn't jam any of the included eartips -- you get three sizes -- far enough into my ears to get a tight seal. While the bendable arm keeps the headphones on -- and in -- your ears, it doesn't help you achieve a tighter seal. And when you don't get a tight seal, you end up losing a lot of bass, and the headphones quickly go from sounding great to sounding not-so-great.
I had a few other quibbles. This is an Apple-friendly headphone that has an inline remote and microphone for making cell phone calls (call quality was decent, though when I was outside, callers said I sounded better when I held the microphone closer to my mouth). Some or all of the remote features may not work with non-Apple devices and the buttons on the remote were a little small. When I used the headphones outside, the wind seemed to reverberate through the aluminum housings more than for your typical, smallish in-ear headphones, which tend to hide inside your ear more and perhaps find a little more shelter from the wind.