Mixcder E9 Wireless Headphones Review

The E9 have a sleek style thanks to the metal-looking cup design. These over-ears are fairly bland otherwise since they only come in black. The cups are rather large as well. They're quite bulky but, on the upside, the padding is thick and comfortable.

The Mixcder E9 are comfortable headphones that can be worn for a while. They aren’t too heavy and the padding of the cups is good and comfortable. The headband design resembles that of the Bose QuietComfort 35 II and is nicely padded. The cups could be slightly deeper, but should be large enough for most ear shapes and sizes. The headphones are a bit bulky but don’t clamp too much, and the cups have a good range of motion, which is great.

These headphones have a great control scheme. The physical buttons are large and clicky, making them quite easy to use. The power button can also be used to play/pause your music and take calls as well. You can easily raise or turn down your volume, and there's an audio cue when reaching maximum or minimum volume. Holding the volume buttons will skip tracks forward and backward. However, you need to be quick if you want to go to the previous tracks, as it might just restart your song instead. The power button could also be in a better position. On the left cup, you also have a dedicated ANC switch which is independent of your power, so be sure to turn it off after powering off the headphones.

Like most over-ears, the Mixcder E9 are not the most breathable option. Due to their design, they trap heat inside the ear cups and will more than likely make you sweat more than usual when working out. These are not the best option for sports, but you shouldn’t have any issues for casual listening.

The E9 are quite bulky over-ears, but thankfully, they can be folded in a more portable design, which is easier to carry around. Their cups also swivel to lay flat, making it easier to slide into a bag or to hang them around your neck. They also come with a nice hard case for when you’re on the move.

The E9 come with a nice hard case. It's a bit thin and feels a bit cheaper than some other models, but still feels durable. It provides the headphones decent protection against scratches, drops, and water.

The build quality of the E9 is decent. The hinges are good and don’t feel like they’ll break, and the headband is reinforced by a thin metal plate. However, the overall build is a bit plasticky and the ear cups are covered in cheap-feeling faux leather material.

The Mixcder E9 are decently stable but won’t be the best option for sports. They stay on the head fairly well, but enough head movement can make them fall quite easily. They shouldn’t be used for running, but thanks to their wireless design, they get rid of the risk of getting a cable stuck or hooked on something and yanking the headphones off your head.

• Mixcder E9 headphones
• 1/8” TRS audio cable
• Micro-USB charging cable
• Carrying case
• Airplane adapter
• Manuals

The frequency consistency of the E9 is very good. Like some other similar noise cancelling headphones, the E9’s ANC system seems to help with bass consistency. Some people with glasses might have a drop in bass, though, especially if there’s a break in the seal.

The bass performance of the Mixcder E9 is excellent. It's flat, well-balanced, and almost follows our target curve flawlessly. There's a bit of an overemphasis in the low-bass range, resulting in a bit of extra thump and rumble common to bass-heavy music.

The Mixcder E9 have a very good mid-range performance. The response is well-balanced throughout the range. This results in an accurate reproduction of vocals and lead instruments. However, there’s a small overemphasis in the low-mid, which can clutter vocals and leads a bit, though this won’t be very audible. There’s also a dip in high-mid which negatively affects the intensity and projection of instruments.

The treble performance of the E9 is decent. The response doesn’t show too much deviation from our curve, but the response is quite uneven. Some frequencies are under our curve while others show a small overemphasis. Overall, the treble lacks detail and brightness, especially in the low-treble.

The stereo imaging is excellent. Their weighted group delay is very low, which is good. The group delay graph also shows that the entire response is below the audibility threshold. This ensures a tight bass and a transparent treble reproduction. Also, the L/R drivers of our test unit were well-matched in frequency, amplitude, and phase response. This is important for the accurate placement and localization of objects (voices, instruments, video game effects) in the stereo image. Note that these results are only valid for our unit and yours may perform differently.

The soundstage of the E9 is sub-par. The graph shows a good amount of pinna interaction and a decent level of accuracy. There’s also a decent PRTF distance, which results in a wide soundstage. However, due to the closed-back design of these over-ears, the soundstage won’t feel very natural and will be situated inside the listener’s head rather than in front.

The noise isolation performance of the Mixcder E9 is decent. It does a good job against bass frequencies, where the rumble of engines sit, making them a viable option for commuting and traveling. They also do a decent job against ambient chatter, which can be useful in an office setting. Against high frequencies like S and T sounds and the noise coming from an A/C system, they do a pretty good job at blocking out noise.

The leakage performance of the E9 is decent. The leakage sounds fuller and more comprehensible than that of in-ears and earbuds. However, the overall level of leakage is not too loud. This shouldn’t be an issue in most situations unless you blast music in a very quiet environment.

The recording quality of the E9’s integrated mic is mediocre. The recorded/transmitted speech sounds thin, noticeably muffled, and lacking in detail. This won’t be the best option for phone calls.

The E9's microphone doesn’t fare well in noisy environments. It struggles to separate speech from ambient noise and therefore will be better suited for quiet environments.

The E9 has about 18 hours of battery life with ANC on, which is good, but slightly disappointing as it's below the 24 advertised hours of continuous playback. With ANC off, the manufacturer mentions a 30-hour battery life. They also take about 3 hours to charge, which is slightly longer than most headphones but shouldn’t be an issue if you just charge your headphones at night. You can also use them while they're charging or wired when they're completely dead, which is very useful.

Unfortunately, this pair of headphones doesn’t have a companion app with dedicated customization options.

The E9 are Bluetooth compatible, but they're on the older 4.0 version. They don't support multi-device or NFC pairing, which is disappointing, and their latency is fairly high on all devices. If you want a pair of similarly-performing headphones that also support aptX-LL for a low latency connection, check out the TREBLAB Z2 Wireless.

You can use the included audio cable to use the E9 wired. You’ll get audio when connecting the headphones to a headphone jack, regarding of the console or device. However, you can’t use the integrated mic when the audio cable is plugged in.

These headphones don’t have a base/dock.