Sony WI-C310 Wireless  Headphones Review

The Sony WI-C310 are fairly simple around-the-neck headphones with a soft and flexible neckband design. The cabling is flat and fairly long, which creates a big loop when putting them in your ears. The buds are very small and don't protrude much from your ears. They come in different colors: white, black, blue, white, and gold. If you don't mind the color of your headphones, look at the near-identical Sony WI-C200 Wireless.

These feel satisfactorily comfortable for in-ears. They don't go too deeply into your ear canal and don’t apply pressure inside your ear since the buds are very small. The headphones feel lightweight, but their long cables can be annoying, as they can snag on something and pull the buds out of your ears.

They come with three tip sizes to help you find the most comfortable fit. That said, their in-ear fit can cause slight fatigue if you're wearing them for extended periods.

The headphones have a pretty straightforward in-line remote with a three-button scheme. You have audio cues when skipping tracks and when reaching maximum and minimum volume. A clear voice prompt helps during the pairing procedure. Unfortunately, the buttons are a bit mushy, making tactile feedback underwhelming. Adjusting the volume using the control module during a call won't impact your music volume playback. The depth of controls varies depending on whether your device is compatible with Hands-free Profile. If your device is incompatible with the Hands-free Profile, the functions are the same except for the press and hold functions for the multi-purpose button during calls.

'+' button

• Single press: Raises volume.
• Press and hold: Skip track forward.

Multi-purpose button

• Single press: Powers on. Plays and pauses audio. Also answers and ends a call.
• Double press: Voice assistant.
• Press and hold: Switches between the headphones and the phone for the call's audio during a call and an outgoing call. Reject incoming calls. Power off.

'-' button

• Single press: Lowers volume.
• Press and hold: Skips to previous track.

Like most in-ear headphones, these are very breathable and won't trap much heat inside your ears. This means you won't feel a big difference with the buds in from the ambient temperature, and you won't sweat more when working out because of them.

Thanks to the flexible neckband design, the headphones are remarkably portable, can easily be folded into a more compact format, and will fit in most pockets or a bag. They're also quite easy to carry around your neck, with the magnetic buds securing the ends together. These headphones don't take up much space, but unfortunately, they don't come with a case to protect them. This can lead to snags or tangling.

The build quality is unremarkable. The two modules feel like they're made from thin plastic and are fairly fragile. While the cables are rubberized and flat, they feel thin and look like you could easily pull them from the bud housing or the modules. Additionally, a lack of IP rating means you must use discretion when exercising or using the buds outdoors if it rains. On the upside, the buds are magnetic, which helps with cable management when they're dangling around your neck.

The Sony WI-C310 Wireless are decently stable enough for a light run or workout. However, a very small tug on the cable can make the buds fall out of your ears. While their wireless design means you don't have a wire in the way, the cable is still very long, creating a big loop when wearing them, so be careful not to get them hooked on something.

• Sony WI-C310
• 3x tip options
• USB-C charging cable
• Manuals

The headphones favor a more neutral-meets-consumer-oriented sound profile. They provide more mid to high-bass, but are still reasonably balanced overall for most listeners. Overall, vocals and instruments sound fairly natural. The extra low-end boom is also pleasing for more bass-heavy content like EDM and hip-hop. These headphones lack sound customization features, so you can't change the tuning without a third-party app.

The frequency response consistency is excellent. If you can achieve a proper fit using the three sets of ear tips that come with the headphones, they'll deliver consistent sound every time you use them.

The bass accuracy performance is great. While they're a little light on thump and rumble common to bass-heavy genres, they make up for it in mid to high-bass warmth. The response overemphasizes the mid- and high-bass, adding a bit of boominess and muddiness to the sound. If you prefer a more bass-heavy sound, check out the similar Sony WI-XB400 EXTRA BASS Wireless.

The mid accuracy is excellent. Overall, these headphones accurately reproduce vocals and lead instruments. However, the small dip in mid-mid slightly nudges them to the back of the mix, but this isn't too audible for most.

These have excellent treble accuracy. From low-treble through most of the mid-treble range, it's well-balanced and even, with some emphasis in the low- and mid-treble, yielding some harshness to vocals. There's a dip in the mid-treble that ends in a peak ending in the high-treble. This means that some, mainly harmonic, frequencies of instruments like cymbals lack detail. However, not everybody hears the high-treble frequencies the same way, as we lose sensitivity to this region over time.

These headphones can control their sound profile well. There's a peak in the bass, a dip in the mid-mid region with a mismatch between the L/R drivers, and a peak in the low-treble. That bass peak contributes to the added boominess of the audio. While the mismatch between the drivers indicates that the right driver will output disproportionately more mid to low-treble than the left, it's only noticeable in a narrow range for instruments like woodwinds, for instance. Lastly, the peak in the treble range adds punchiness. Because these dips and peaks aren't extreme, your audio plays back without too much exaggeration or underemphasis relative to the rest of the audio.

The stereo imaging is excellent. The weighted group delay is very low. Our unit's group delay is well below the audibility threshold, ensuring a tight bass and a transparent treble reproduction. Sony manufactures many headphones at different price points, and many of their similarly-priced budget headphones have good quality control and ergonomics.

Also, the L/R drivers of our unit are 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. There's phase mismatch in the mid-mid and the right earbud, which means that the right earbud plays back some mid frequencies like guitars or speech more loudly. Note that imaging varies between units.

The soundstage is poor. This is because creating an out-of-head and speaker-like soundstage largely depends on activating the resonances of the pinna (outer ear). The design of in-ears and earbuds fully bypasses the pinna and doesn't interact with it.

Also, because these headphones have a closed-back enclosure, their soundstage won't be perceived to be as open as that of open-back earbuds like the Apple AirPods (2nd generation) Truly Wireless or the bone conduction headphones, like the Shokz OpenRun Bone Conduction.

The weighted harmonic distortion performance is decent regardless of whether you listen at moderate volumes or high volumes. Most of the distortion lands in higher frequencies, but it's unlikely that you'll notice distortion at these levels as it's well under 1%.

These are the settings used to test these headphones. Our results are only valid when using them with this configuration.

The headphones have an overall mediocre noise isolation performance. Their fit doesn't block much lower frequencies like the rumbling of a bus engine, which means they won't be ideal for commuting. On the upside, they somewhat isolate mid-range noise, like ambient chatter. They perform excellently in the treble range, responsible for fan noise and clatter, which is expected of passive isolation-only in-ear buds.

The leakage performance is excellent. The headphones don't leak in the low-bass through mid-mid ranges, which results in a thin-sounding leakage. Most leakage occurs in a relatively narrow mid-mid to mid-treble range and isn't loud in most settings. The resulting leakage sounds quiet for most offices and trebly, so you can listen to your music without disturbing others.

The in-line mic has a sub-par recording quality. The mic's frequency response reproduces very thin audio that lacks detail and presence. However, speech will still be understandable when captured in quiet environments. Low-pitched voices will suffer the most as the curve rolls off volume significantly in lower frequencies.

Ensure the microphone faces your mouth when using it. The downside of a cable microphone is that it can turn around, leading to muffled audio quality.

The in-line microphone is satisfactory at noise handling. The mic is best suited for quiet and moderately noisy environments. However, the mic will struggle to separate speech from ambient noise in loud situations. Similarly, if you're out and about on a call, the mic module is on a long enough cable that it can add unpleasant noise by bumping or brushing against your shoulder or neck.

We measured about 17 hours of battery life for a single charge of these neckband headphones. The battery will last long enough for a full workday or two without a problem, depending on variables like how loud your volume is. However, they can take some time to charge at under three hours. According to the manufacturer, you can fast charge the headphones for 10 minutes to yield 60 minutes of playback. Unfortunately, they don't have any power-saving features, so be sure to turn them off when you're not using them.

These earbuds are Bluetooth 5.0 compatible, meaning you get the standard SBC and AAC codec selection. They can't connect to multiple devices simultaneously and don't support NFC pairing.

The Sony WI-C310 aren't the best option to watch video content, as many folks will notice a delay between audio and video. However, some apps and devices offer some compensation.

The Sony WI-C310 are Bluetooth-only headphones; you can't use them with an audio cable.

Because the Sony WI-C310 are Bluetooth-only headphones, that's how they connect to computers.