The JBL E50BT are stylish, wireless headphones with a decent sound and a sturdy, durable build. They have a well-crafted design but oddly shaped ear cups that don't fit properly around the ears. Unfortunately, this creates a poor seal that lets noise seep into your audio and also leaks quite a bit.
The JBL E50BT are rugged yet stylish and feel somewhat high-end. They're not as well made as some premium headphones we've tested, but they have a sturdy frame and dense ear cups that can handle a few drops without getting damaged. Unfortunately, the oddly sized ear cups are also uncomfortable. They're bulky, cumbersome headphones to comfortably carry on your person and they're not stable enough to use while jogging (see our recommendations for the best headphones for running).
The JBL Synchros E50BT have a good design that gives them a more premium appeal than their price point would suggest. They have circular and flat ear cups that do not protrude outwards once on your head. The headband and frame are wide and look sturdy. They come in a variety of color schemes to suit your tastes. They won't be the ideal looking headphones for everyone, and the hinge mechanism looks a little awkward.
The JBl E50 have oddly sized ear cups that don't quite encompass the ears. Therefore the fit is somewhere between an over ear and an on-ear design, which unfortunately means they won't be the most comfortable for listeners with larger ears. They're not too tight but the rigid padding and the awkward fit exerts pressure on the tip of your ears, which gets uncomfortable during long listening sessions.
These headphones offer good button placement and functionality. They provide call/music, track skipping, and volume controls, which can all be found on the left ear cup including the power/Bluetooth sync button. The controls do not feel cramped and are well laid out. However, the buttons are flat with no tactile indicators.
The JBL Synchros E50BT are not the most portable. They fold into a compact format and the ear cups also lay flat. Although due to the wide headband this doesn't save much space. They're a little on the larger side for over-ear headphones and will be cumbersome to carry on your person without a bag.
The JBL E50BT have a pretty sturdy build quality. The ear cups look robust and dense enough to handle a few drops without getting damaged. The headband and frame are also relatively thick and flexible and should be able to withstand moderate-to-high physical stress. However, the hinge mechanism only connects on one side of the earcups, which gives them a greater range of motion but also slightly weakens the build.
The JBL E50 are moderately stable. They're sufficiently tight on the head and won't move much during casual listening sessions. However, similarly to the Audio Technica ATH-M50x, they're not sports headphones. They're bulky and will quickly fall when used while running or jogging. On the upside, the wireless design makes them less likely to be yanked off your head due to the audio cable being hooked on something.
The frequency response consistency of the E50BT is sub-par. We measured more than 6dB of variance in bass across our 5 human subjects. The bass delivery is also sensitive to whether the user wears glasses. The treble delivery is also inconsistent and sensitive to positioning, but more consistent than the bass response.
The JBL Synchros E50BT deliver a subpar isolation performance. They only block noise through the passive isolation the ear cups provide. Unfortunately, due to their awkward fit, they don't prevent noise from seeping into your audio or from leaking and potentially distracting the people around you. They won't be the ideal headphones for loud, noisy commutes or long flights, and they may be a bit too noisy to use in a library or other quiet environments (see our recommendations for the best noise cancelling headphones).
Poor isolation. Due to the passive isolation and poor fit, these headphones fail to achieve any isolation in the Bass Range. The amount of isolation achieved in the Mid and Treble Ranges are also sub-par.
Poor Leakage. The large drivers and poor seal of these headphones cause them to leak a lot. The majority of the leakage is between 800Hz and 5Khz, with a sharp peak in loudness at 1.5KHz.
The JBL E50 have an excellent wireless range but quite a bit of latency for watching videos. It shouldn't be an issue when streaming audio but they won't be the ideal headphones for gaming or watching movies. They also do not have an app to control the active features or enhance sound. On the upside, they have an above-average battery life.
The JBL E50BT have an average battery life. They last around 20 hours which makes them decent headphones to use on a long flight or a road trip. Unfortunately, there is no auto-off timer so if you leave them on they will run out of battery. You also can't use them while they're charging as the power and audio cables share the same port.
No compatible app.
The JBL E50 have a great wireless range. They rarely dropped any audio either indoors and outdoors. They even maintained a stable connection slightly above 50ft when the Bluetooth source was placed in another room. This makes them a good pair of wireless headphones to use around the house or at the office. However, they have the typical hold-to-pair procedure and no NFC so it might get a little tedious to switch between Bluetooth devices.