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In the box
Anker SoundBuds Curve
The Anker SoundBuds Curve are good sports headphones, with a long battery life and a decent sound. They're comfortable with a stable ear-hook design for exercising and working out. They're compact enough to fit into your pockets, and they're decently well built, although the audio cable is a little thinner than comparable wireless in-ears. Unfortunately, they do not block that much noise so they may not be the best headphones for loud, noisy environments and their sound may be a bit too bass-heavy for some.
See our recommendations for the best Earbuds.
- Stable and portable design.
- Comfortable fit.
- Very low leakage.
- Mediocre-at-best noise isolation.
- Slightly thin audio cable.
The Anker SoundBuds Curve have a decent design that looks a lot more premium than their price would suggest. The earbuds feel dense, durable and are a bit more comfortable than typical in-ears. They also have an ear-hook design with additional stability fins that make them stable enough for the gym. Unfortunately, the tips tend to slide out of your ears from time to time, especially during more strenuous workouts. They also have fairly thin cables that do not feel as durable as some of the other wireless in-ear/earbuds we've tested like the Bose SoundSport Wireless. On the upside, they have a simple and straightforward control scheme and come with a decent case that's portable.
The Anker SoundBuds Curve have a surprisingly decent-looking, sporty aesthetic, considering their price range. They have thick and flexible ear-hooks, and the matte finish makes the earbuds feel a bit more premium than the similarly designed SoundPeats Q9A. The inline remote and the cable, however, feel a bit cheap. They also do not come in as many color schemes to match your tastes and preference but, their understated look will work for most.
The Anker Curve are quite comfortable for an in-ear design. The tips do not enter as deeply into the ear canal like most in-ear, which removes a bit of the soreness and pain some listeners experience during long listening sessions. Unfortunately, the rubber tips sometimes slide a bit in the ear canal, which can be slightly distracting and somewhat uncomfortable for some. On the upside, they come with 6 tip options to help you find the right fit so it shouldn't be much of an issue.
The Anker Curve have a simple 3 button layout with no additional features. It's an easy-to-use and efficient control scheme that provides all the essential functions; call/music, track skipping, and volume controls. However, the buttons are a bit small, and even if they're fairly easy to find on the in-line remote by touch, bigger buttons with a bit more feedback would have been preferred.
- 100% Avg.Temp.Difference
The Curve are very breathable headphones. Like most in-ears, they do not cover the outer ear which remains relatively cool when exercising and working out. They do cover a bit more surface area than typical in-ears due to their ear-hook, earbud-like design but it's a negligible difference and won't make you sweat like on-ears or over-ears do.
The Anker Curve are easy to carry around on your person. They're compact, lightweight and you can fold them to easily fit into a pocket, bag, or purse. They're slightly larger than straightforward, wired in-ear designs, but are still very portable and come with a decent case.
These headphones come with a decent hard case that will protect them from minor impacts, scratches, and falls. However, the case shell is not as hard as some of the other hard cases we've tested but on the upside, it's compact and can fit into a pocket.
The Anker SoundBuds Curve have a decent build quality but thin audio cables. The earbuds and ear-hooks are fairly dense and relatively sturdy, making them better built than some cheaper sports-oriented like the Mee Audio X6 Plus. They feel better built and more premium than the similarly designed Q9A, but the audio cable is thinner and less durable.
These headphones have a stable ear-hook design that's great for sports. They won't easily fall off your ears even during intense workout sessions. They also have a couple of stability fins included in the box that helps with the fit, which makes even more stable. However, the earbuds will slip out of your ear canal from time. They won't fall but the change in the seal when they move around slightly changes the audio which may be an issue for some.
The Anker SoundBuds Curve is a decent sounding pair of closed-back in-ear headphones. They have a deep, powerful and consistent bass, a clear and neutral mid-range, and an even and well-balanced treble. However, their bass is slightly overpowering, which may be welcomed by the fans of bass-heavy genres, and their mid-range lacks a bit of emphasis on vocals and lead instruments. On the upside, they have a great imaging performance, but like most other in-ears, they don't have a large and speaker-like soundstage.
The bass is quite good. Their LFE (low-frequency extension) is at 10Hz, which is excellent. Low-bass, responsible for the thump and rumble in bass-heavy genres like EDM, Hip-hop and film scores, is overemphasized by more than 5dB. This results in quite a bit of thump and rumble, which fans of bass may like. Mid-bass and high-bass are also hyped, but only by 3dB. Overall, the bass is thumpy and heavy without sounding too muddy and cluttered.
The SoundBuds Curve have an excellent mid-range performance. The overall response is quite even and flat but recessed by about 2dB. This nudges the vocals and lead instruments towards the back of the mix, by giving bass and treble a bit more emphasis.
The treble is good. Low-treble is even and within 0.75dB of our target. Mid-treble is also quite well-balanced, but a little uneven between 8Khz and 10KHz. This could make some of the sibilance (S and T sounds) slightly lacking, and some other sibilances a tad too sharp. Overall though, their treble response is quite well-balanced, which is important for a good reproduction of vocals, leads, and cymbals.
The frequency response consistency of the Anker SoundBuds Curve is excellent. If the user is able to achieve a proper fit and an air-tight seal using the assortment of tips that come with the headphones then they should be able to get consistent bass and treble delivery every time they use the headphones.
The imaging performance is excellent. The weighted group delay is at 0.2, which is very low. The GD graph also shows that the entire group delay response is below the audibility threshold. This ensures a tight bass and a transparent treble reproduction. Additionally, the L/R drivers of our test unit were very well-matched, which is important for the accurate placement and localization of objects (instruments, voice, footsteps), in the stereo image.
The soundstage is poor. This is because creating an out-of-head and speaker-like soundstage is largely dependent on activating the resonances of the pinna (outer ear). The design of in-ears and earbuds is in such a way that 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, Google Pixel Buds, or the Bose SoundSport Free.
The harmonic distortion performance is very good. In the bass range, they show very little THD, even under heavy loads. This suggests that the Curve could take a few dB of EQ boost in the bass range before distorting. The THD in the mid-range, however, is rather elevated and could sound a bit harsh and fatiguing around 1KHz.
The Anker SoundBuds Curve only passively block ambient noise which won't be ideal for commuting and very noisy environments. The in-ear buds do not create the best seal within the ear canal, which allows some of your surrounding environment to seep into your audio, unlike some of the other in-ears we've tested. On the upside, since they barely leak you can mask some of the noise by playing your music at higher volumes without distracting those around you.
The Anker SoundBuds Curve have a mediocre isolation performance. In the bass range, where the rumble of bus and airplane engines sit, they achieve about 3dB of isolation, which is barely noticeable. In the mid-range, important for cutting out speech, they isolate by more than 16dB, which is good. In the treble range, occupied by sharp S and T sounds, they isolate by about 27dB, which is above-average.
The leakage performance is great. Like most other closed-back in-ear, these headphones don't leak in the bass and mid-ranges. The significant portion of their leakage is in the treble range and between 3KHz and 6KHz, which is quite a narrow range. The overall level of the leakage is not loud either. Peaking at around 57dB SPL at 1 foot away, which is about the same as the noise floor of most offices.
The in-line microphone has a sub-par quality. In quiet environments, speech recorded or transmitted with this mic will sound noticeably thin, and quite muffled and lacking in detail. However, it will still be understandable. In noisy environments, the Anker SoundBuds Curve will struggle to separate speech from background noise even in moderately loud situations, like a busy street.
The SoundBuds Curve's microphone has a sub-par recording quality. The LFE (low-frequency extension) of 369Hz means speech recorded/transmitted with it will sound noticeably thin. The HFE (high-frequency extension) of 2.5KHz is poor and results in speech that is muffled and lacking in detail. It also negatively affects the intelligibility of speech.
- 100% SpNR
The in-line mic is mediocre at noise-handling. In our SpNR test, they achieved a speech-to-noise ratio of 13dB, indicating they are best suited for quiet environments and will struggle to separate speech from ambient noise in moderate and loud situations.
The Anker SoundBuds Curve have a decently long battery life but poor power saving features and no app support for customization. They lasted up to 13 hours on a single charge, which should be enough for a day of moderate-to-heavy use. They also do not take too long to charge (1.7 hours). Unfortunately, the lack of an app makes them less customizable than some of the other wireless in-ears like the Jaybird X3. They also do not turn-off automatically when inactive as long as they're paired with your Bluetooth source which is a little disappointing.
The Anker Curve have a decent battery life of 13 hours and only took about 1.5 hours on average for a full charge. This makes them a decent option for the casual and heavy user, but unfortunately, they do not have a lot of power saving features to extend their battery life. They will stay paired to your device until the battery runs out or they are out of range so if you forget to switch them off the battery will continue to drain which is not ideal.
These headphones do not come with a compatible app for added customization options.
- 10% Bluetooth
- 32% Wired
- 10% Base/Dock
- 22% Wireless Range
- 25% Latency
The SoundBuds Curve are Bluetooth-only headphones with no audio cable or base/dock. They have a decent wireless range but do not support simultaneous multi-device pairing or NFC. On the upside, they have relatively low latency for a Bluetooth headset and even support aptX but still won't be the ideal headphones for gaming or watching movies.
- 79% Multi-Device Pairing
- 20% NFC
- 0% PS4 Compatible
- 0% Xbox One Compatible
The Anker Curve do not have multi-device pairing or NFC support. On the upside, their hold-to-pair procedure is not difficult to use and not as frustrating as some Bluetooth headphones due to the decent feedback of the buttons on the in-line remote.
- 13% Analog
- 9% USB
- 26% PS4 Compatible
- 26% Xbox One Compatible
- 26% PC Compatible
The Anker SoundBuds Curve have no wired option. If you want a decent sounding, wired design with a universal in-line remote, then check out the 1More Triple Driver In-Ear.
- 4% Optical Input
- 22% Line In
- 4% Line Out
- 22% USB Input
- 4% RCA Input
- 9% PS4 Compatible
- 9% Xbox One Compatible
- 9% PC Compatible
- 2% Power Supply
- 13% Dock Charging
These in-ear buds do not have a dock. If you want a headphone that's versatile and has a dock, try the SteelSeries Arctis 7. However, it won't be as compact and easy-to-carry around on your person.
The Curve have an average wireless range, even when the Bluetooth source was obstructed but they are not as far-reaching as some of the other wireless in-ears we've tested like the BeatsX. They should have enough range for most use cases, especially if you keep your phone on you, but they won't be ideal for very large office spaces and fixed Bluetooth sources like a PC or TV.
The Anker SoundBuds Curve have quite a bit of latency which is not ideal for watching movies and a lot of video content. It's less than most typical Bluetooth headphones especially when connected to an aptX device but it won't be suitable for gaming and movies.
In the box
- Anker SoundBuds Curve Headphones
- Earbud tips (x6)
- Stability fins (x3)
- USB charging cable
- Carrying case
Compared to other Headphones
The SoundBuds Curve are decently well-rounded in-ears for sports. They have a stable and sweatproof ear-hook design with additional stability fins and a decently well-balanced sound that packs a lot of bass. They're lightweight and portable and surprisingly well-designed for their low budget price. Unfortunately, although they are stable, the earbuds tips would sometimes slip out of your ears and the audio cable is quite thin and does not feel as durable as some of the competing wireless in-ear models below.
The Anker SoundBuds Sport are average in-ear headphones that deliver a stable wireless fit that's great for sports. They're about as stable as the Curve despite not having an ear-hook design, but the in-ear buds go a bit deeper into the ear canal. This also means that they're a bit more uncomfortable than the Curve, but on the upside, their in-ear fit blocks a lot more ambient noise. The Curve are the better headphone overall with a more balanced sound and they're very affordable. However, the SoundBuds Sport isolate a bit more and are more portable for commuting.
The Soundpeats Q9A are affordable sports headphones with a stable ear-hook design like the SoundBuds Curve. However, they do not feel as well-built or as premium, and their sound quality is a bit less balanced. They also struggle to isolate in noisy conditions but overall, they are decent headphones for most use cases. The SoundPeats are slightly cheaper than the Ankers but also perform slightly worse in all categories, they're also not as sweatproof. So unless you're on a very tight budget, go for the SoundBuds Curve instead.
The Fitbit Flyer are good sports headphones that have a fairly common wireless in-ear design. They feel a lot more premium and durable than the Anker SoundBuds Curve but do not benefit from the extra stability of the ear-hook design. On the upside, they come with a variety of tips and stability accessories, which make them stand out when compared to other wireless in-ears. They also isolate better than the Ankers in loud environments but have a much shorter battery life and a worse sound quality. They're also considerably more expensive.
The Jaybird X3 are great sports headphones with a customizable sound and a good wireless range. They sound a bit sharper out-of-the-box when compared to the Anker Curve but thanks to the Jaybird MySound App, they're a lot more versatile. They're also better-built, more durable and feel more high-end than the Ankers but they're also considerably more expensive. If you like to tweak your headphones to sound just the way you like, then the Jaybird X3 are a great option, especially for sports. However, the battery life and budget price of the Anker SoundBuds Curve makes them a good alternative, especially if noise isolation is not the highest priority for you.