The Anker Soundcore Liberty 4 True Wireless are wallet-friendly in-ears. Like the Anker Soundcore Space A40 Truly Wireless, they support multi-device pairing and LDAC, which is Sony's proprietary codec for Hi-Res audio. They also can access Anker's Spatial Audio feature, which offers speaker modeling and head tracking to help create a more immersive audio experience and have a built-in heart-rate sensor you can then monitor in the app. On the downside, our unit's L/R drivers are mismatched, skewing audio to the right.
The Anker Soundcore Liberty 4 are mediocre for neutral sound. Out of the box, they have a very bright sound profile, which is a bit piercing and painful. They have extra bass, but to balance out the rest of their sound profile, Anker also boosted their high-mid to treble range. Unfortunately, this results in harsh vocals and instruments while sibilants like cymbals are piercing. Luckily, you can finetune their sound to your liking using their companion app's graphic EQ and presets. The app also offers a spatial audio feature, which allows the headphones to track your head movements for a more immersive experience.
The Anker Soundcore Liberty 4 are decent for commute and travel. These buds are comfortable, well-built, and lightweight. They're also small enough to fit into most bags or cases without an issue. That said, even though they have an adaptive ANC system, they struggle to block out the low rumble of bus engines. Their over six-hour continuous battery life may not last through long trips, but their carrying case has an additional two charges.
The Anker Soundcore Liberty 4 are great for sports and fitness. They have a comfortable and well-built fit that's certified IPX4 for resistance against splashes of water. They also have a built-in heart-rate monitor and you can use the app to track it. Even though they don't have stability fins, once you get a good fit, they should stay in place during moderate activities like a jog in the park. Unfortunately, the buds can pop out of your ears while you're chewing or talking, which is a bit annoying.
The Anker Soundcore Liberty 4 are fair for office use. These buds have a comfortable fit suitable for long days at the office and their ANC system can tackle ambient sound like coworkers chatting around you. They also support multi-device pairing, so you can connect the buds to your phone and PC simultaneously. While they last over six hours and may need a top-up throughout the workday, their carrying case holds two extra charges if you need it.
The Anker Soundcore Liberty 4 are Bluetooth headphones and can't connect to PlayStation or Xbox consoles. Their latency is also likely to be too high for wireless gaming on PCs.
The Anker Soundcore Liberty 4 are truly wireless headphones and can't be used wired.
The Anker Soundcore Liberty 4 are alright for phone calls. They have an integrated mic that does a mediocre job of capturing your voice clearly. It does a better job of separating your voice from background noise though, so if you need to take a call from a busy street, you'll be heard clearly. These buds also have an ANC system that can help block out a fair amount of ambient noise.
The Anker Soundcore Liberty 4 come in two color variants: 'Midnight Black' and 'Cloud White'. We tested the 'Midnight Black' variant and you can see our model's label here. If you come across another variant of these headphones, please let us know in the discussion section below and we'll update our review.
The Anker Soundcore Liberty 4 are wallet-friendly in-ears that are similar in design to the Anker SoundCore Life P3 Truly Wireless. Like the P3, they have robust sound customization features and have ANC to help block out background noise. However, their noise isolation performance falls short compared to other similarly-priced in-ears such as the Anker Soundcore Space A40 Truly Wireless. In addition, they have a pretty bright sound profile that's piercing. On the upside, they support LDAC, which is a proprietary codec by Sony for Hi-Res audio.
Check out our recommendations for the best wireless Bluetooth earbuds, the best noise cancelling earbuds, and the best wireless earbuds for Android.
The Anker Soundcore Liberty 3 Pro Truly Wireless are slightly better in-ears than the Anker Soundcore Liberty 4 True Wireless. While both headphones are comfortable and well-built, the Liberty 3 have a more neutral and balanced sound profile, which some users may prefer, and they're able to block out significantly more ambient noise. However, the Liberty 4 have a better battery and mic performance.
The Anker Soundcore Space A40 Truly Wireless are better in-ears than the Anker Soundcore Liberty 4 True Wireless. While both buds are well-built and comfortable, the Space A40 have a better-balanced sound profile, which some users may prefer, and their ANC system does a significantly better job of blocking out background noise. They also have a better battery performance. However, the Liberty 4 have a virtual soundstage feature to help immerse you in your audio, and their companion app offers more overall features.
The Anker SoundCore Life P3 Truly Wireless and the Anker Soundcore Liberty 4 True Wireless have different strengths and depending on your usage, you may prefer either one. Although both headphones are comfortable and well-built, the P3 have a more neutral sound profile, which some users may prefer, and their ANC is able to block out a superior amount of background noise. However, the Liberty 4 support multi-device pairing, have a more robust companion app, and can access Anker's Spatial Audio for a more immersive audio experience.
The Anker Soundcore Liberty 4 True Wireless have a lot more features than the EarFun Air Pro 2 True Wireless 2021. The Anker have a companion app with features like an EQ, a virtual soundstage feature to help immerse you in your audio, and they support multi-device pairing. However, the EarFun have a more neutral sound profile, which some users may prefer, and their ANC is able to block out more background sound.
The Anker Soundcore Liberty 4 True Wireless are slightly better than the JBL LIVE 300TWS Truly Wireless. While both in-ears are comfortable and well-built, the Anker can block out more background noise, thanks to their ANC, they have a better battery performance, and their companion app is a lot more robust. They also support multi-device pairing, so you can connect them with up to two devices at a time. However, the JBL have a more neutral sound profile, which some users may prefer.
These headphones have a somewhat similar look to the Anker SoundCore Life P3 Truly Wireless with an ear stem design. They have a slightly glossy finish and the manufacturer's label is on both stems. They come in two colors: 'Midnight Black' and 'Cloud White'.
The Anker Soundcore Liberty 4 have a comfortable fit. They're lightweight and don't have a deep in-ear fit. Unfortunately, they can pop out of your ears if you're chewing or talking. We also noticed that the ear tips could detach from the buds when pulling them out of your ear, leaving the tips in your ear canal. On the upside, they come with a few different sizes of ear tips to help you get the best fit.
These headphones have good controls. They have a touch-sensitive surface on each stem that's easy to use. There are chimes to let you know when you're cycling between ANC, normal, and transparency modes. There are also tones for tap feedback, though you have to turn this feature on in the companion app.
On the left ear:
On the right ear:
On either earbud:
The carrying case is quite similar in build to other Anker products like the Anker Soundcore Liberty 3 Pro Truly Wireless. There's a light on the front of the case to help you know when the case is on. There are two lights inside the case, one for each bud, that light up and blink when the buds are charging. There's a pairing button on the back of the case too.
The Anker Soundcore Liberty 4 have a very bright sound profile. While they have extra bass to add thump, punch, and boom to audio, they have even more treble, which makes vocals and instruments sound harsh. Sibilants are also piercing, which can cause listening fatigue over time. Luckily, you can really fine-tune their sound to your liking using their companion app's graphic EQ and presets. While our unit's L/R drivers are mismatched and it's noticeable in real-life content, this may not be the case for all units.
The frequency response consistency of these buds is excellent. They're a bit sensitive to fit and can pop out of your ear over time, which can affect their treble delivery. However, once you get a good fit using the provided ear tips, you should get consistent audio delivery each time you use them.
The bass accuracy of these headphones is good. The left driver is more overemphasized than the right driver, adding extra thump, punch, and boom to mixes. This is well-suited for genres like EDM and hip-hop with rumbly basslines.
The mid accuracy of these buds is decent. The low to mid-mid are fairly flat and well-balanced, which results in present vocals and instruments. However, the high-mid is overemphasized, so the upper harmonics of vocals and instruments are very harsh.
The Anker Soundcore Liberty 4 have poor treble accuracy. The range is very overemphasized across the range and is more prominent in the right driver. As a result, vocals and instruments are harsh and painful while sibilants are piercing and painful. In songs like Losing My Religion by R.E.M., cymbals and S and T sounds are overly sharp and can be fatiguing during long listening sessions.
The peaks and dips performance of these buds is satisfactory. The left and right drivers are mismatched, so the left driver has more overemphasized bass than the right. This adds extra thump, punch, and boom to mixes. However, a dip affects the left driver in the low-mid, thinning vocals and instruments, while the dip in the right driver affects the mid-mid, pushing vocals and instruments to the back of the mix. Another peak affects the right driver in the high-mid, making vocals and instruments sound harsh. In addition, the left driver is more affected by the dip in the low-treble, veiling vocals and instruments. That said, both drivers are equally affected by a peak in the mid-treble, which makes sibilants piercing and painful.
The imaging performance is good. Anker has had a few hits and misses when it comes to quality control. While our unit's L/R drivers are well-matched in group delay, which ensures tight bass and transparent treble, there's slight amplitude and frequency mismatch, which can cause an imbalance in the stereo image. There are also a couple of peaks starting in the low-mid all the way to the low-treble. This causes channel imbalance and vocals in songs like Rolling in the Deep by Adele are pushed back in your mix as well as skewed to the right. However, imaging can vary per unit depending on quality control and ergonomics.
These headphones have a bad passive soundstage, but that's to be expected from in-ears. Their design bypasses your outer ear, which needs to be activated by sound in order to create a large and out-of-head soundstage. Their soundstage seems small, closed-off, and as if sound is coming from inside your head, which isn't very immersive.
These headphones have a Spatial Audio mode in their companion app. It allows you to choose between fixed speaker modeling and head tracking. You can also choose between 'Music Mode' and 'Movie Mode', which can help create a more immersive audio experience.
The Anker Soundcore Liberty 4 have a good weighted harmonic distortion performance. There's a very small peak in between the mid to high-bass, which is very hard to hear with real-life content. All the frequencies otherwise fall within good limits, resulting in clean and pure audio reproduction.
These are the settings used to test these earbuds. Our results are only valid in this configuration.
The noise isolation performance is okay. We encountered a couple of issues testing their noise cancelling (ANC) performance, though. These headphones have an adaptive ANC system, which automatically adjusts performance to better suit the noise around you. However, the ANC can turn off if the skin sensor isn't activated, so we used silicone with copper tape to simulate skin. The adaptive ANC would also switch to a lower level if it determined that our test signal wasn't loud enough. In addition, we noticed a couple of peaks above 0. In the case of the 11-120Hz band, we recorded roughly 6dB of difference between ANC off and the headphones completely removed from our rig. As a result, we are investigating this issue. However, these issues are all limited to our testing, and you won't encounter them in real-life use.
When using the adaptive ANC, the buds do a sub-par job of blocking out the low rumble of bus engines, which can be frustrating if you travel a lot. They're more effective when it comes to mid-range sounds like office chatter, though. However, they can passively isolate more high-pitched noise like the hum of an AC unit than the ANC.
These headphones also have manual ANC controls with three modes: 'Weak', 'Moderate', and 'Strong'. You can see a comparison between the manual and adaptive ANC here. The adaptive ANC offers a slightly better overall noise isolation performance than setting the manual ANC to 'Strong'. If you're looking for earbuds with better-performing ANC, consider the Sony WF-C700N Truly Wireless.
The noise handling performance of the mic is very good. The mic is able to separate your voice from background noise. That said, speech can become distorted if there are loud sounds like a train arriving at the station, while you're talking.
The battery performance of these buds is decent. They're advertised to last seven hours continuously with their ANC on, but we measured less than that at six hours. That said, battery life can vary depending on use, including your listening volume, and whether you have the ANC and Spatial Audio modes on. Luckily, there are two additional charges in their carrying case, if you need it. They also have an auto-off timer that you can customize via the companion app, and you can use one bud while the other one charges.
These headphones are compatible with the Anker Soundcore app, which offers an outstanding amount of features. You can adjust the ANC controls, switch between manual and adaptive ANC, and customize the transparency mode. You can also access an 8-band graphic EQ and presets, access the Spatial Audio mode, and switch sound modes between SBC and LDAC codecs. You can even adjust the prompt tones as well as the auto-off timer and update the firmware. What's a bit unusual is that the app has a few wellness-related features too such as guided workouts. Since the buds have a built-in heart-rate monitor, the app can also be used to detect your stress levels. You can see a video of how these kinds of features work here.
The Anker Soundcore Liberty 4 have great Bluetooth connectivity. They can connect with up to two devices at a time and they support LDAC codec, which is Sony's proprietary codec for Hi-Res audio. Keep in mind that if you're using LDAC, you won't be able to connect to more than one device simultaneously. When you're using LDAC, they have high latency on PC, so this codec isn't ideal for streaming. It's lower on Android devices though. If you're using SBC, which is the default codec, they have high latency on PC and Android devices, though it falls within acceptable levels on iOS. Keep in mind that some apps compensate for latency.
These headphones can connect to PCs via Bluetooth with full audio and mic compatibility. However, you won't be able to connect them to these devices in any other way.
The Anker Soundcore Liberty 4 come with a carrying case that holds two extra charges. It has a USB-C port for charging up the case, and it supports wireless charging.