Under Armour JBL Sport Wireless Train

Product Information

With 4K Ultra HD resolution and support for all the most advanced HDR formats, you'll enjoy sharp details and lifelike colors, and it runs on Google TV to access all of the popular streaming services. iPhone users who aren’t quite sold on JBL’s partnership should consider the mighty Beats Powerbeats Pro. Although both iOS and Android are compatible with AAC streaming, only iPhones and other iOS devices deliver consistent streaming qualities over AAC. The top band can handle quite a bit of pressure -- I was totally comfortable bending it every which way. For the most part, the headphones stay put during my workout, except when I lie on my bench to do dumbbell presses, at which point they fall off my head.

With exaggerated bass and treble and slight under-emphasis in the mids, the default frequency response masks the midrange sounds. Both headsets still support just AAC and SBC, though; and neither headset can connect to two source devices at once. The song ICY GRL by Saweetie sounds fun through the JBL UA True Wireless FLASH X thanks to the tame bass emphasis, which allows for sub-bass and bass notes to stand out a bit from other instrumentation.There’s no cable here, meaning both earbuds are untethered, with silicon ear tips and a rounded casing to keep them closely fitting inside your ear. The RPT-01 excelled with bass-heavy tracks, but otherwise sounded average when trying more balanced genres. Possibly the best feature in the My JBL Headphones app is customizable EQ settings, which you can draw in for yourself.

I’m pleased that JBL has considered outdoor activities; however, personally I’ve had more use out of the dedicated Ambient mode.The Bose Sport Earbuds sound and look great, and they’re some of the most comfortable workout earbuds around thanks to the StayHear Max ear tips. Athletes who take their workouts seriously and are constantly pushing their physical limits may enjoy the JBL UA True Wireless FLASH X.

With a USB-C connection and the cable included in the box, a five-minute speed charge provides you 120 minutes of battery power. You also won’t get any speed charging features here, meaning you shouldn’t wait until five minutes before a workout to plug the case into the wall.One unfortunate similarity between these headphones: The inescapable tightness that comes with on-ear headphones that are meant to stay in place during intense workouts. The partnership forged a great pair of workout earbuds, so let’s see if the FLASH X stands out from the likes of Beats and Jaybird. I loved switching between my laptop and phone by plugging and unplugging the chord, depending on what I was doing and what I wanted to listen from moment to moment. Bluetooth codec support isn’t optimal as the earbuds only allow listeners to stream over SBC or AAC.

The headphone jack is an addition to the package that gets you the best possible sound quality, too.This brings up an important caveat about the Wireless Train: At the time of this review, they’re already two years old. This, combined with the noticeable, yet comfortable pressure of the headband, makes for a very secure fit. Active mode is best saved for runs, retaining a degree of noise-cancelling whilst letting in some ambient sounds to establish awareness of surroundings.