Ultimate Ears FITS Truly Wireless Headphones Review

The Ultimate Ears FITS are truly wireless in-ears with a unique design. Their ear tips are a bit large since they're designed to mold to fit your ears for personalized comfort. The earbud is long and skinny, with an Ultimate Ears logo printed on it. They come in three color variants: 'Midnight Blue', 'Grey', and 'Lilac'.

The Ultimate Ears FITS are impressively comfortable. Using their app, their Lightform technology creates a custom fit by molding the ear tips to your ears. They're lightweight, and they don't put a lot of pressure on your ears, even when you make an input on their touch-sensitive controls. They also don't go very far into your ear canal. They're a bit bulky and stick out of your ears, which may be inconvenient for some listeners. You can only mold each pair of tips once, but you can purchase extras from the manufacturer.

Note: The image shows the headphones after they've been molded to fit our test dummy head.

The Ultimate Ears FITS have okay controls. By default, every command plays/pauses your audio, but you can use the companion app to add a few other functions, including track skipping and volume control. You can also add a voice assistant function, although it has to be assigned a double tap on one of the earbuds. However, you can't remap the call-related controls.

The touch-sensitive controls are generally easy to use, although sometimes commands don't register on your first try. Fortunately, you hear different tones for a double tap and a single tap, making it easy to know when a command is registered. You also get audio feedback when they connect with or disconnect from a device and when you hit maximum and minimum volume. However, they use the same chime for max and min volume, which could be a bit confusing.

On either earbud:

• Single tap: Plays and pauses audio. Also answers a call.
• Double tap: Plays and pauses audio. Also ends a call.

The Ultimate Ears FITS are incredibly breathable. Thanks to their truly wireless design, they don't trap a lot of heat in your ears. You won't really feel a temperature difference while wearing them, and you likely won't sweat more than usual.

The Ultimate Ears FITS are fantastically portable. Their truly wireless design is small and lightweight, and they'll easily fit into your pockets. They also come with a small carrying case that will likely fit into most pockets or bags.

They come with a decent case. It's small enough to fit in purses and pockets and has a button inside it for Bluetooth pairing. The silicone interior has a nice feel, but unfortunately, the outside of the case is really prone to collecting fingerprints, and the lid feels thin.

The Ultimate Ears FITS have a good build quality. They're mostly made of silicone-like plastic that feels solid and durable. Unfortunately, the case collects fingerprints. The earbuds aren't rated for dust or water resistance either, which is disappointing since many Βluetooth earbuds that we've tested are rated at least IPX4 for resistance against minor water exposure.

These headphones are impressively stable. Though they stick out of your ears a bit, they're more stable than some sports-oriented earbuds like the Jabra Elite 7 Active True Wireless and easily stay in place during workouts. They may accidentally register commands if you're shaking your head intensely. If that becomes an issue, you can choose to turn off the single tap, double-tap, or both commands using the companion app.

• Ultimate Ears FITS earbuds
• Charging case
• USB-C to USB-A charging cable
• Manuals

The Ultimate Ears FITS have a pretty neutral sound profile. They lack a bit of low-bass, so you don't feel the deep thump and rumble in bass-heavy genres like EDM, but there's a little extra warmth and boom in the high-bass that some listeners may enjoy. Vocals and lead instruments are pretty clear and present in the mix, though sibilants like S and T sounds can be honky and harsh. There's also a graphic EQ and presets available in the Ultimate Ears Fits companion app to help you customize their sound.

The Ultimate Ears FITS have okay frequency response consistency. There's some inconsistency in the bass and treble delivery, so depending on their fit, seal, and positioning on your head, they may sound a bit different each time you use them. They're a bit difficult to test since they're molded to fit our dummy head's ears. We also can't subjectively confirm our results with this unit. We believe they perform a bit more consistently than this test is showing, and the results may be a result of an issue with our dummy head.

The Ultimate Ears FITS have good bass accuracy. Even though the tips are molded to your ears, which will help create a good seal, they still lack a bit of low and mid-bass, so you don't hear the deep thump and punch in genres like EDM. There's a small bump in the high-bass that brings some extra warmth to the mix, though.

The Ultimate Ears FITS have amazing mid accuracy. The range is pretty neutral and balanced, so vocals and lead instruments are clear and present in the mix.

The Ultimate Ears FITS have decent treble accuracy. The underemphasized low-treble can hurt the comprehensibility of vocals and lead instruments slightly. The overemphasized mid-treble adds harshness to sibilants like S and T sounds, making some vocals, like Jisoo in the first verse of You Never Know by BLACKPINK, seem a bit piercing.

The Ultimate Ears FITS have mediocre peaks and dips performance. There's some frequency mismatch between the left and right drivers, especially in the low-bass range, so your audio may lack some rumble in one ear and have a little extra in the other. There's also a peak in the high-bass to low-mid ranges that can add a boomy quality to the mix, which slightly muddies vocals and lead instruments. The dip in the mid-mid nudges those same instruments slightly towards the back of the mix. The peak in the mid-treble makes sibilants like cymbals very harsh and piercing.

The Ultimate Ears FITS have a great imaging performance. Their weighted group delay falls below the audibility threshold, resulting in a tight bass and transparent treble. The L/R drivers of our unit are well-matched in amplitude response, which helps to accurately place and localize objects like footsteps and voices within the stereo image. The drivers have a mismatched phase response affecting mid-bass to mid-mid frequencies. It can create inaccuracies in the stereo image, but it's hard to hear with regular content. There's a bit of frequency mismatch, which can also cause 'holes' in the stereo image at certain frequencies. Imaging can vary between units and can indicate a manufacturer's quality control and ergonomics.

Like most truly wireless in-ears, these headphones have a bad passive soundstage performance. Due to their design, they don't interact with the outer ear, which is one of the key factors in creating a large and out-of-body soundstage. Audio seems like it's coming from inside your head rather than from speakers placed around you. The soundstage also seems more closed-off than that of most open-back headphones.

The Ultimate Ears FITS have a good weighted harmonic distortion performance. There are a couple of small peaks in the treble range at normal volume levels, but it shouldn't be very noticeable. All frequencies otherwise fall within good limits, resulting in clear and pure audio reproduction.

These are the settings we used to test these headphones. Our results are only valid when using these settings.

The Ultimate Ears FITS have a disappointing noise isolation performance. Even though the tips are molded to your ears, and the manufacturer advertises the earbuds to have a strong passive noise isolation performance, they don't do a good job of blocking out rumbling engines or ambient chatter. They do a decent job of cutting out high-pitched noise like a humming computer fan.

The Ultimate Ears FITS have an incredible leakage performance. They don't leak a lot of audio, and escaping sound is thin. If you're listening to audio at a high volume, it shouldn't really bother those around you unless you're in a very quiet setting like a library.

The integrated microphone has an alright recording quality. Your voice sounds clear to whoever's on the other end of the line but also a bit thin and unnatural.

The mic has a passable noise handling performance. Your voice is understandable if you're calling from a moderately noisy environment. However, background noise is also audible, and your voice may be drowned in a loud setting like a busy subway station.

These headphones have an adequate battery performance. They last for about eight hours off a single charge, and the case stores about 1.5 additional charges. You can use one earbud while the other charges in the case, which is convenient in a pinch, and they recharge quickly. However, please note that battery life can vary with real-life usage.

The Ultimate Ears FITS Truly Wireless have a great app. You can use it to mold new ear tips to your ears and test their fit. You can only mold each pair of ear tips once, but you can buy extras from the company without buying a new pair of earbuds. The app also lets you remap the onboard controls and includes a graphic EQ and presets for sound customization.

The Ultimate Ears FITS have an okay Bluetooth performance. They don't support multi-device pairing, which can be inconvenient if you often switch between using your phone and computer. They have low latency with iOS and Android devices, so you can watch a video on your phone without worrying about audio syncing issues. Unfortunately, their latency with PCs is high, so if you take a video call on your computer, your audio and video may be out of sync. They also support the aptX codec for high-resolution audio but still have high latency when you use it.

The Ultimate Ears FITS are wireless-only. They come with a USB-C to USB-A cable, but it's just for charging their case.

These earbuds work with Bluetooth-enabled PCs but can't connect any other way.

The Ultimate Ears FITS charging case stores around 1.5 extra charges. You can charge the case using the included USB-C to USB-A cable, but it doesn't support wireless charging.