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Reviewed on Jun 19, 2018

Anker SoundCore Spirit X Wireless

Usage Ratings - Version 1.2
Mixed Usage
Critical Listening
Type : In-ear
Enclosure : Closed-Back
Wireless : Yes
Noise-Cancelling : No
Mic : Yes
Transducer : Dynamic

The Anker SoundCore Spirit X are good sports headphones, versatile enough for most use cases. They have an above-average build quality that feels a lot more high-end than their price would suggest. They also have a decent sound with a lot bass, a comfortable and stable in-ear fit for the gym, and a better control scheme than the similarly designed Anker Soundbuds Curve. Unfortunately, like the Curve, they won't be the best choice for loud, noisy environments, watching movies or gaming.

Test Results
Design 7.7
Sound 6.8
Isolation 6.1
Microphone 6.3
Active Features 5.9
Connectivity 2.7
  • Stable and portable design.
  • Comfortable fit.
  • Very low leakage.
  • Mediocre-at-best noise isolation.
  • Slightly thin audio cable.

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Soundcore Spirit X


The Anker SoundCore Spirit X have a slightly improved design over the Anker SoundBuds Curve. The in-line remote and control scheme is a lot better with more spaced out and clicky buttons. The earbuds also look sleeker than the Curve, feel dense and durable, and are a bit more comfortable than typical in-ears. They also have an ear-hook design with additional stability fins, to make them more stable for working out and running. Unfortunately, the tips do tend to slide out of your ears from time to time, especially during more strenuous exercises which can get a bit annoying. 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


The Anker Spirit X have a decent-looking, sporty aesthetic that looks and feels more premium than their price range would suggest. They have thick and flexible ear-hooks, and a more polished earbud design than the Anker Curve. They also have a better in-line remote. Unfortunately, like the Curve, they also have thin cables that do not seem as durable as some of the more expensive wireless sports headphones we've tested like the Fitbit flyer. This somewhat cheapens their design, and they also do not come in as many color schemes as most sport-oriented headphones. On the upside, their understated look will work for most.

7.5 Comfort
Weight : 0.05 lbs
Clamping Force
0 lbs

The Anker Spirit X, like the Curve, are quite comfortable for in-ear headphones. The tips do not enter the ear canal as deeply as most in-ears, which makes them more comfortable and removes a bit of the soreness and pain some listeners experience during long listening sessions with in-ear headphones. Unfortunately, since they do not enter the ear canal as deeply, they tend to slide out of your ears sometimes and may need to be adjusted somewhat often, which may get a bit annoying. It's not a big issue, but it's more common when doing physical activity. Overall though, these headphones will be comfortable enough for most listeners.

7.5 Controls
Ease of use : Good
Feedback : Good
Call/Music Control : Yes
Volume Control : Yes
Microphone Control : No
Channel Mixing
Noise Canceling Control : N/A
Additional Buttons : No

The Anker SoundCore Spirit X have a slightly better control scheme than the Anker Curve. The buttons are more responsive with clicky feedback and they're better spaced out on the in-line remote. They also have a simple 3 button setup 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.

8.9 Breathability
Avg.Temp.Difference : 1.1 C

The Anker SoundCore Spirit X, like the Beats Powerbeats3 Wireless, the Altec Lansing True Evo and most in-ear headphones, are very breathable. They have an ear-hook design which does have more points of contact with your ear than typical in-ear models. However, the temperature difference is negligible and won't make you sweat more than you have to during more intense physical exercises since they do not cover your outer ear like over-ear and on-ear designs.

8.5 Portability
L : 2.1 "
W : 3 "
H : 1.2 "
Volume : 7 Cu. Inches
Transmitter required : N/A

The Anker SoundCore Spirit X are easy to carry around on your person and come with a good compact case. Like most wireless in-ear headphones, they're portable, lightweight and you can fold them to fit into your pocket, bag, or purse. They're slightly larger than straightforward, wired in-ear designs (since they have ear-hooks), but they're still very portable and come with a decent case.

7.5 Case
Type : Hard case
L : 3.2 "
W : 3.2 "
H : 1.4 "
Volume : 14 Cu. Inches

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.

7.0 Build Quality

The Anker SoundBuds Spirit X have the same build quality as the Anker Curve. They have a slightly more polished earbud design and a better in-line remote but thin and non-replaceable cables. The earbuds and ear-hooks are fairly dense and relatively sturdy, making them better built than most sports-oriented headphones in their price range like the Senso ActivBuds S-250 or the Mee Audio X6 Plus. They're also more water resistant, but we have yet to implement a reliable and comparable test for water resistance without permanently damaging some headphones. For waterproof headphones with a thicker and shorter cable, take a look at the JBL Endurance Dive.

8.0 Stability

Unlike the SoundCore Liberty Air, the Soundcore Spirit X have a stable ear-hook design that's great for sports. They also have a couple of stability fins included in the box that helps with the fit, which makes them even more stable. However, the earbuds do slip out of your ear canal from time to time especially during more intense activity. They won't fall from your ears but the change in the seal when they move around alters their sound, which is not ideal when running or working out.

Detachable : No
Length : N/A
Connection : N/A

The Spirit X come with a micro-USB charging cable.

Headshots 1
Headshots 2


The Anker SoundCore Spirit X 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. Compared to the SoundBuds Curve, the Spirit X have an improved bass with less muddiness, but their sound rating is basically the same because the L/R drivers of our test unit were slightly mismatched.

8.2 Bass
Std. Err.
2.61 dB
Low-Frequency Extension
10 Hz
4.47 dB
2.38 dB
0.75 dB

The bass is great. 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 is also hyped, but only by 3dB. High-bass, responsible for warmth is over our neutral target by less than 1dB, which is an improvement over the SoundBuds Curve. Overall, the bass is thumpy and heavy without sounding muddy and cluttered.

8.7 Mid
Std. Err.
1.76 dB
-1.57 dB
-1.99 dB
0.36 dB

The Anker SoundCore Spirit X 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.

7.3 Treble
Std. Err.
4.06 dB
0.64 dB
0.55 dB
-8.53 dB

The treble performance is good. Low-treble is even and within 0.65dB 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.

9.4 Frequency Response Consistency
Avg. Std. Deviation
0.12 dB

The frequency response consistency is excellent. If the user can 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.

8.3 Imaging
Weighted Group Delay
Weighted Amplitude Mismatch
Weighted Frequency Mismatch
Weighted Phase Mismatch

The imaging performance is excellent. The weighted group delay is at 0.17, 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.

1.7 Soundstage
PRTF Accuracy (Std. Dev.)
PRTF Size (Avg.)
PRTF Distance
Acoustic Space Excitation
Correlated Crosstalk
0.0 dB

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.

6.4 Total Harmonic Distortion
Weighted THD @ 90
Weighted THD @ 100

The harmonic distortion performance of the Spirit X is mediocre. The amount of THD produced in the bass range is very low, which is great. Additionally, the THD at 100dB SPL is lower in the bass range compared to the 90dB SPL. This could be due to the increase flexibility of the driver under heavier loads. The amount of harmonic distortion in the mid and treble ranges though, is a bit elevated, which could make the sound a bit impure.



The Anker SoundCore Spirit X have mediocre isolation. In the bass range they have almost no noticeable isolation, so the rumbles of a bus or airplane engines will easily seep into your audio. On the upside, they do decently well with higher frequency noise, and they have very good leakage performance, so you can mask some of the ambient noise in your environment by playing your music a little louder without bothering the people around you in an office setting.

5.2 Noise Isolation
Isolation Audio
Overall Attenuation
-13.08 dB
-1.79 dB
-14.3 dB
-24.43 dB
21.54 dB

The Anker SoundCore Spirit X have a mediocre isolation performance. In the bass range, where the rumble of bus and airplane engines sit, they achieve about 2dB of isolation, which is barely noticeable. In the mid-range, important for cutting out speech, they isolate by more than 14dB, which is above-average. In the treble range, occupied by sharp S and T sounds, they isolate by about 24dB, which is also above-average. If you want sports-oriented wireless headphones that provide a bit more isolation than the Spirit X then check out the Jaybird Freedom 2 or Jaybird Tarah.

8.0 Leakage
Leakage Audio
Overall Leakage @ 1ft
33.86 dB

The leakage performance of the Spirit X 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 4KHz and 7KHz, which is quite a narrow range. The overall level of the leakage is not loud either. With the music 100dB SPL the leakage at 1 foot away averages at 34dB SPL and peaks at around 60dB SPL, which is just above the noise floor of an average office.



Detachable Boom

The Anker SoundCore Spirit X have mediocre microphone. In quiet environments, speech recorded or transmitted with this mic will sound relatively thin, and noticeably muffled and lacking in detail. However, it will still be understandable. In noisy environments, it will struggle to separate speech from background noise even in moderately loud situations, like a busy street.

6.3 Recording Quality
Recorded Speech
285.09 Hz
FR Std. Dev.
2.55 dB
3133.58 Hz
Weighted THD
45.25 dB

The microphone has a mediocre recording quality. The LFE (low-frequency extension) of 285Hz means speech recorded/transmitted with it will sound noticeably thin. The HFE (high-frequency extension) of 3.1KHz is poor and results in speech that is muffled and lacking in detail. It also negatively affects the intelligibility of speech.

6.2 Noise Handling
Speech + Pink Noise :
Speech + Subway Noise :
14.77 dB

The in-line microphone of the Spirit X is mediocre at noise-handling. In our SpNR test, they achieved a speech-to-noise ratio of 15dB, indicating they are best suited for quiet environments and will struggle to separate speech from ambient noise in moderate and loud situations.


Active Features

The Anker SoundCore Spirit X have mediocre active features. There is no companion app available for them, and the sound cannot be customized in any way unlike some of the other sports headphones we've tested like the Jaybird X3. The battery life is slightly shorter than the Soundbuds Curve, but should still last through a typical work day and can be recharged fairly quickly in case they run out.

6.6 Battery
Battery Type
Battery Life
11.9 hrs
Charge Time
1.8 hrs
Power Saving Feature
Audio while charging
Passive Playback

Decent battery performance. The battery lasts about 12 hours, which should easily last a typical workday. They recharge relatively quickly, but they have no power saving feature so the battery will continue to drain even when they're not in use.

They do not support passive playback and cannot be used while charging.

0 App Support
App Name : N/A
iOS : N/A
Android : N/A
Mac OS : N/A
Windows : N/A
ANC control
Mic Control : N/A
Room effects
Playback control
Button Mapping : N/A
Surround Sound : N/A

The Anker Spirit X do not have any compatible companion app.



The Anker SoundCore Spirit X have poor connectivity. They don't support NFC and can't be paired to multiple devices simultaneously but do remember the last synced device. Unfortunately, they can only be used wirelessly, and aren't compatible with any game consoles. The wireless range is decent but slightly worse than the Anker Curve and like most Bluetooth headphones, the wireless latency is too high for watching a lot of video content or gaming.

6.0 Bluetooth
Bluetooth Version
Multi-Device Pairing
NFC Pairing

The SoundCore Spirit X support Bluetooth 5.0, but they don't have NFC support and must be paired manually. We did not test Bluetooth 5.0's dual audio feature.

These headphones have an interesting feature. When you start playing music immediately after pairing, the music fades in instead of immediately going to full volume.

0 Wired
OS Compatibility
Analog Audio
USB Audio
PS4 Compatible
Xbox One Compatible
PC Compatible

These headphones can only be used wireless.

0 Base/Dock
Optical Input
Line In
Line Out
USB Input
RCA Input
PS4 Compatible
Xbox One Compatible
PC Compatible
Power Supply
Dock Charging

There is no compatible docking station or base for these bluetooth headphones. Unlike truly wireless headphones there is no charging case.

7.2 Wireless Range
Obstructed Range
30 ft
Line of Sight Range
88 ft

The wireless range is decent on the Anker SoundCore Spirit X. It is slightly worse than the Anker Curve. When approaching the outer limits of the range, the fade in feature makes these headphones almost unusable, as they keep fading in and out each time they lose the connection for a brief moment, so the overall volume is low.

Our testing is not currently able to take advantage of the new features of Bluetooth 5.0. If you have a compatible device (e.g. iPhone 8, 8+, X; Samsung Galaxy S8), your range might be better than what we tested.

2.1 Latency
Default Latency
200 ms
aptX Latency
aptX(LL) Latency

The Anker Spirit X have very high latency and are unsuitable for watching videos. The latency is slightly worse than the Anker Curve. They also do not support the aptX codec.

In the box

  • Anker Soundcore Spirit X  Headphones
  • Earbud tips (x5)
  • Stability fins (x3)
  • Cable management clip
  • USB charging cable
  • Carrying case
  • Manual

Compared to other Headphones

The Anker SoundCore Spirit X are decently versatile wireless sports headphones and one of the best cheap earbuds we've tested. They have a stable and sweatproof ear-hook design with additional stability fins.  They also have a long 12hr battery life and an above-average sound quality that packs a lot of bass. They're lightweight and portable and surprisingly well-designed for their budget price. They're one of the best wireless earbuds for running we've tested. Unfortunately, although they are stable, the earbuds tips do tend to slip out of your ear canals from time to time, which can be a bit annoying. They also have relatively thin cables that do not look as durable as the rest of the design, and they are not as customizable as some of the other headphones compared below. See our recommendations for the best wireless earbuds under $50 and the best cheap wireless earbuds.

Anker SoundBuds Curve Wireless

The Anker SoundBuds Curve and the Anker Soundcore Spirit X are practically the same headphones, with very slight differences. The Spirit X are slightly better due to their higher sweat and water resistance, and their in-line remote offers better tactile feedback. You also get a cinch for easier cable management. If you have a Bluetooth 5.0 source, you might get better wireless range and connection stability with the Spirit X. On the other hand, the Curve have lower latency, support the aptX codec, and are even more affordable. These two headphones are great budget options, but if you don’t really care for the additional sweat resistance, the Curve will satisfy most users.

Anker SoundBuds Sport Wireless

The Anker Soundcore Spirit X are better in-ears overall when compared to the Anker SoundBuds Sport. The Spirit X have better sound quality, a more stable and durable design for sports, and they're a lot more sweatproof than the Anker Sports. The Spirit X also have a better control scheme and a much longer battery life that lasts more than twice as long as the SoundBuds Sport. On the other hand, the Sports are a bit more portable and have a better noise-isolating in-ear fit, so they're more suitable for noisy environments and commuting.

Jaybird Tarah Pro Wireless

The Jaybird Tarah Pro are better headphones than the Anker Soundcore Spirit X. They are better-made and you can also customize their sound to your liking thanks to their companion app. Their amazing wireless range is also better, and you get better default sound quality, even before EQ’ing them. On the other hand, the Spirit X are very comfortable in-ears and come with plenty of fit options. They also come with a nice hard case and have good sound quality for their price point, which might offer better value for most users.

Beats Powerbeats3 Wireless

For the money, the Anker Soundcore Spirit X might be a better choice for most consumers. The Beats Powerbeats3 Wireless are better headphones than the Anker Spirit X since they have a slightly more neutral sound signature and feel more solid due to thicker cables. On the other hand, the Ankers are more comfortable and come with a nice solid case. Unfortunately, they don’t have the great wireless range of the Powerbeats3, but if you keep your phone on you during your workouts, this shouldn’t be an issue.

Anker SoundCore Liberty Air Truly Wireless

The Anker SoundCore Liberty Air are more versatile than the Anker Soundcore Spirit X. The truly wireless design of the Liberty Air gets rid of the cable and has a more portable design. Fans of bass may prefer the sound profile of the Spirit X, but the Liberty Air has better overall sound quality. The fit of the Liberty Air is also better for isolating ambient noise than the Spirit X. However, the Spirit X have a longer battery life, and their ear-hook design is very stable for sports. You also get a nice in-line remote with volume controls and are rated IPX7, while the Liberty Air is rated IPX5 for sweat and water resistance.

JBL Endurance Dive Wireless

The Anker SoundCore Spirit X Wireless are slightly better sports headphones than the JBL Endurance Dive and offer better value thanks to their affordable price. They are more comfortable and their physical controls are easier to use than the touch-sensitive area of the Dive. They fit nicely inside the ears and are very stable for sports. Their sound quality is also a bit more accurate, and they have almost double the amount of battery life of the Endurance Dive. On the other hand, the JBL’s fit isolates against a good amount of ambient noise, which makes them a better option for commuting. Their cable is also thicker and rubberized, which makes them more durable than the Spirit X. They also have a noticeably better wireless range and have onboard storage for when you want to use them for swimming or working out without a phone.

Jaybird X2 Wireless

The Jaybird X2 are a better sports headphone and headset overall than the Anker Soundcore Spirit X. The X2 have a more isolating in-ear fit that's better for noisy environments and commuting. They also have a slightly more portable design since they do not have ear-hooks like the Ankers. The Ankers, on the other hand, are a bit more stable thanks to those ear hooks. They also have a longer battery life and a more comfortable in-ear fit than the Jaybird X2.

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6.7 Mixed Usage
Decent for mixed usage. The Anker SoundCore Spirit X are versatile enough for most use cases, except home theater and gaming, since they are Bluetooth only headphones with fairly high latency. On the upside, they're a great option for sports thanks to their stable, compact and wireless ear-hook design. They also have a long 12hr battery life and a decent build quality, that feels a lot more premium than their price range. However, they do not feel as durable as some of the more expensive wireless in-ears we've tested since they have thin cables. Their sound quality also has a bit too much bass for more critical listeners but should be good enough for most listeners.
6.9 Critical Listening
Decent for critical listening. The Anker Spirit X have a slightly bass heavy sound that will overpower some instruments and vocals in the midrange, however, the rest of their audio reproduction is fairly well balanced. Their mid-range is relatively flat, so instruments will not sound too forward or recessed, although they will be a bit cluttered due to the emphasized bass range. They don't sound as sharp as some of the other in-ears we've tested and fans of bass will enjoy the added thump and rumble these headphones produce, especially while working out at the gym. Unfortunately, they have small closed earbuds that cannot create a bid spacious soundstage. This means they won't be the best headphones for more critical listeners but should sound good enough for most, especially if you like a little bass.
6.8 Commute/Travel
Decent headphones for commuting or traveling. They have mediocre isolation that isn't very good at reducing the rumble of a bus/train/plane engine, but will reduce the chatter around you. They have a decent sound that is best suited for bass-heavy genres. They have excellent breathability, and there should be no issues wearing them for longer commutes.
7.8 Sports/Fitness
Good headphones for sports and fitness use. The Anker Spirit X have an ear-hook design that is great for sports. Even during intense movements, they shouldn't fall off, but the seal isn't perfect so the sound changes a bit as they move, which isn't great for jogging. They are comfortable for longer workouts, and they breathe well. They are very compact headphones that are easy to carry around, but they are a bit larger than true in-ear due to the ear-hooks. They produce a decent sound that is better suited for bass-heavy genres.
6.8 Office
Decent headphones for office use. The Anker Spirit X have mediocre isolation but a very good leakage performance. You can listen to your music at higher volumes, without bothering your coworkers and they are a comfortable in-ear fit and a long battery life that will easily last a typical workday.
5.3 TV
Disappointing headphones for home theater use. The sound is decent, and voices are clear, but vocals aren't emphasized and could be lost in the overpowering bass. As these are Bluetooth wireless headphones, they can't be used wired and have too high latency, so the sound is out-of-sync with what is shown on your screen. They are comfortable and can be worn for longer periods without issue.
5.1 Gaming
Sub-par headphones for gaming. The Anker Spirit X are comfortable and can be worn for long gaming sessions without getting too hot. They produce decent sound and the bass is a bit exaggerated which can be good for some games. They can only be used wireless, and they have too much latency. They have a mediocre in-line mic that works for gaming, but won't provide the best vocals. They cannot be used with any gaming consoles without a special adapter.

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