Bluetooth is a wireless technology standard that allows data transfers between devices placed in close proximity, using short-wavelength, ultra-high frequency radio waves. For a quick overview, the simple view also gives you the opportunity to evaluate the sound characteristics of the test candidate at a glance. They consist of a power button, another button for switching on and off the noise cancellation, and buttons for volume up and down and play/pause. JBL claims that the cans have a “rugged construction” but, while it would take considerable effort to break them, we did find that the plastic scuffed fairly easily. The only doubt I have is the long-term suitability of the soft artificial leather cover of the ear cushions.

Turn the feature on and the clarity and level of detail that the Tune600BTNCs serve goes up a notch. At the same time, the headphones are pleasantly light and can be quickly stowed away by folding in the earpieces.If you favour uncompressed FLAC recordings over the MP3 though, the TUNE 600 BTNC won't do you any good. I would not describe the sound of the Tune600BTNC as linear—JBL conceals the Bluetooth codecs used in the technical specifications. As a one stop, ‘block the world out’ option, they make a huge amount of sense and as they are active, their performance is less dependent on the equipment that they are connected to. When you play more delicate material with real instruments some of the slight failings of the JBL are easier to determine.

Overall, JBL Tune 600BTNC headphone is a solid wireless headphone that delivers exceptional sound quality, has a long battery life, and is easy to use.

Others say that they're harder to connect with any device, the Bluetooth is not the best, and there's too much crackling and lost connections.

In case you fancy at the minimum a commonplace level of Bluetooth distance, these ones should please you with 10 m. But if you’re using the headphones in a quiet environment, you will start to notice significant white noise whenever you pause the music. Almost every headphone we test is checked by us: In addition to determining the frequency response, the heart of our measurements, we also evaluate the effects of noise that penetrates from the outside to the inside. The noise cancelling is not as good as expected, and the Bluetooth keeps cutting out when they've been between meetings.I also find that the pressure that the earpads exert on my ears can be a little uncomfortable during those longer listening sessions. there is a button which allows one to turn on noise cancelling which really gives the user a world of their own.