“Because the KLH Fusion Earbuds are very lightweight and fit so well, they are really comfortable to wear for long periods of time, and with a battery life of 28 hours (with the portable charging case) you may well want to use these earbuds for endurance sports like ultrarunning or road cycling.

The richness and clarity in the bass and treble are very noticeable, and as I run with these earbuds, I’m comparing the KLH Fusion Earbuds to the Jaybird VISTA, an alternative favorite of mine, that are also premium wireless earbuds robust enough for mountain running, ultrarunning, and working out in the gym. Listeners can hear even the smallest details in their music.”

“The sound that comes from these tiny earbuds is incredible and many steps above some of the other wireless headphones out there. I rarely have to re-adjust either earbud at any point – not to mention they are incredibly comfortable and durable and the voice commands and charging case make my life a whole lot easier. KLH has really put out an incredible product with the Fusion.”

“Bass response on the headphones was impressive, to say the least. In listening to a range of styles and genres of music, the Ultimate Ones displayed their ability to handle a wide array of dynamic sounds. Audio came through crisp and clear, and I often found myself drifting away into the music… KLH Audio knocked it out of the park with the Ultimate One headphones. These open-back headphones are exceptionally comfortable to wear, the beryllium driver produces an astoundingly dynamic and impressive sound stage, and the price is simply unbeatable. Looking up and down the list of open-back headphones that we’ve unboxed, I honestly don’t think there’s a better pair out there right now.”  ”

“Listeners looking for exceedingly comfortable, open-back, over-ear headphones that deliver a relaxed and musical presentation would do well to try the KLH Ultimate Ones. After a couple of minutes, you may find them hard to take off…”