The JBL Endurance Sprint are good sports headphones, decent enough for most use cases. They have a unique and sporty design that feels decently well-built and compact enough to carry around on your person. They also have a stable in-ear fit that blocks a lot of noise, making them suitable for running and working out as well as commute and travel. Unfortunately, they aren't the most comfortable headphones for long listening sessions, and their control scheme isn't as precise. They're also slightly lacking in active features, but on the upside, they sound balanced enough for most genres.
The JBL Endurance Sprint have a decently durable build quality and a cool looking sporty design that will appeal to some. They have dense and rubberized earbuds, with thick ear-hooks that make them stable enough for most sports and physical activities, although they are a bit bulkier than most sports-oriented wireless in-ears. They have a few unique design quirks, like the tip enhancers for a better fit and magnetic hooks that stick to the bottom of the earbuds, which makes them easy to attach to a backpack or gym bag. Unfortunately, their touch-sensitive control scheme, while a nice addition, is not as precise as physical controls, and getting the right fit can be a bit tricky sometimes. They only provide 3 tip sizes and do not come with a case, which is slightly disappointing.
The JBL Endurance Sprint have a unique and sporty look that will work for some. They look decently well-built thanks to their dense, and heavily rubberized earbuds. The buds and the ear hooks are bit larger than most wireless in-ears with a similar design and have a magnetic base which allows the hooks to lock into place so you can easily clip them to your backpack, keychain, or wallet. Overall, the Sprint look and feel like decently well-made sports headphones, and they stand out a bit more than other sports-oriented designs thanks to the larger earbuds and cool rubber coating. However, this may also be a deal breaker for users that want a more understated design for working out.
The JBL Endurance Sprint are somewhat comfortable headphones but take a lot of adjusting to find the right fit. They have a typical in-ear design but with larger than average ear hooks. The hooks are fairly malleable and fit well behind your ears, but the earbuds have a twist-to-lock wear procedure that can be a bit finicky and doesn't always create the best fit in the ears. They also do not come with as many tip sizes so they will feel like regular in-ears once you get the right fit which won't be ideal for all listeners. They should be comfortable enough for sports and casual listening, but they won't be the ideal headphones for really long listening sessions.
These headphones come with a touch-sensitive control scheme that provides all the essential functions but can be a bit difficult to use accurately. The controls' layout is straightforward; swipe up and down on the right earbud for volume, left and right swipes control rewind and track skipping respectively, and tapping manages calls and pauses or plays your music. Unfortunately, the relatively small touch surface doesn't always track your swipes accurately. Swiping for volume would often rewind or skip tracks accidentally which can get quite frustrating when you're working out. The touch surface is also very sensitive so you may accidentally pause your music when adjusting the fit or have the headphones playing audio when you just dangle them around your neck which is a real pain when listening to audiobooks and podcasts. On the upside, the audio feedback when increasing volume or skipping tracks is decent.
The JBL Endurance Sprint 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 design but it's a negligible difference and won't make you sweat like on-ears or over-ears do.
The Endurance Sprint are easy to carry around on your person. They're decently compact and despite the slightly larger than average ear hooks and earbuds they should still easily fit into most pockets and bags. Unfortunately, they do not come with a good case or pouch which slightly reduces their overall portability.
The JBL Endurance Sprint have an above-average build quality for a wireless in-ear. They have dense and rubberized earbuds with thick earhooks that feel decently sturdy. The earbuds especially look rugged and durable however the audio cable that links the two buds is fairly thin. It's not as rubberized as the rest of the design and not flat or braided like some of the more premium in-ears we've tested. They should be sturdy enough to last you a while and have IPX7 waterproofing. However, since we do not yet have a water and sweat resistance test we cannot vouch for their durability and resistance against water damage.
These headphones have a stable ear-hook design that's good for sports. The ear hooks prevent them from falling off your ears even during the most strenuous of exercises. However, the earbuds do not always stay put and may slide out of your ears from time to time especially if you do get the right sized tip for your ears. The enhancer attachment that goes around the tip of the buds helps reduce this issue by adding more points of contact with your inner ear but if you do not get the twist-to-lock wearing procedure right they will pop out of ears somewhat often. On the upside they are still stable enough to be a good sports headphone for running and working out, you just have to get the right fit.
The JBL Endurance Sprint are an above-average sounding pair of closed-back in-ear headphones. They have a deep, punchy, and well-balanced bass, an even and clear mid-range, and a very well-balanced treble. This makes them quite versatile and suitable for a variety of genres, from bass-heavy EDM and Hip-hop to rock and indie, and even podcasts and audiobooks. However, they are a bit hyped in bass, which fans of heavy bass may like, and vocals and lead instruments could sound a tad thin and pushed back on them, due to the recess in their mid-range. Additionally, they have excellent imaging, but like most other headphones, they don't have a large and speaker-like soundstage.
The bass is excellent. LFE (low-frequency response) is at 10Hz, indicating a deep and extended bass. Low-bass, responsible for the thump and rumble common to bass-heavy music and sound effect is hyped by about 2dB. Fans of heavy bass may like this. Mid-bass, responsible for the body of bass guitars and the punch of kick drums is within 0.3dB of our neutral target. High-bass, responsible for warmth, is underemphasized by about 2dB. Overall, the bass of the Endurance Sprint is deep, thumpy, without sounding boomy.
The mid-range performance is great. The response throughout the range is well-balanced and even, however, low-mid and mid-mid are underemphasized by about 3dB. This thins out the vocals and lead instruments a little bit and nudges them towards the back if the mix.
The JBL Endurance Sprint have a very good treble range performance. The response is quite even throughout the range and quite well-balanced. Low-treble is flat and within 0.9dB of our neutral target. Mid-treble is also flat, but overemphasized by about 2dB. Overall, their treble produces just the right amount of detail and brightness, but the sibilances (S and Ts) may sound a tad hyped on certain tracks.
The JBL Endurance Sprint have excellent frequency response consistency. Assuming the user is able to achieve a proper fit and an air-tight seal using the assortment of tips that come with the headphones, they should be able to get consistent bass and treble delivery every time they use the headphones. However, if the user fails to achieved a proper and air-tight seal, they could experience a drop in bass.
The imaging of the Endurance Sprint is excellent. The weighted group delay is at 0.16, which is very good. The GD graph also shows that the group delay response never crosses the audibility threshold, suggesting a tight bass and a transparent treble reproduction. Additionally, the L/R drivers of our test unit were well-matched in amplitude, frequency, and phase response, which is important for the accurate placement and localization of objects (voices, instruments, video games effects) in the stereo image.
The soundstage is poor. Since creating a large and speaker-like soundstage is partially dependent on having a speaker-like pinna activation, and in-ear headphones bypass the pinna (the outer ear) and don't interact with it, their soundstage will be perceived to be small and located inside the listener's head. Their closed-back design also means that their soundstage won't feel and open as open-back earbuds like the AirPods and the SoundSport Free.
The harmonic distortion performance is good. The overall amount of THD produced in the bass range is quite low and within very good limits. Also, for most of the spectrum there is not a significant rise in THD under heavier loads, and there is even a decrease in THD, especially in the mid-range. This is most likely due to the increased flexibility of the driver at louder volumes. However, the peaks in THD around 1KHz could make the sound of those frequencies a bit harsh and impure.
The JBL Endurance Sprint have good enough passive isolation to be suitable for commute and travel. Once you achieve a good fit with the provided in-ear tips and enhancer, the Sprint creates a great seal within the ear that prevents a lot of ambient noise from seeping into your audio. They also barely leak even at high volumes so you can mask more ambient noise by playing your music at higher volume levels without distracting those around you.
The JBL Endurance Sprint have a good isolation performance. Although these headphones don't have active noise cancellation (ANC), their in-ear design provides a lot of isolation. This is similar to what we have seen with some other in-ears like the Jaybird X3 and Beats BeatsX. In the bass range, where the rumble of airplane and bus engines sits, they provide more than 13dB of isolation which is above-average and quite impressive for a passive isolation. In the mid-range, important for blocking out speech, they isolate by about 21dB, which is very good. In the treble range, occupied by sharp sounds like S and Ts, they achieve 37dB of isolation, which is also very good.
The leakage performance of the Endurance Sprint is excellent. These headphones do not leak in the bass and mid ranges, resulting in a very thin sounding leakage. The significant portion of their leakage is concentrated over a very thin band around 5KHz. The overall level of the leakage is not very loud either. With the music at 100dB SPL, the leakage at 1 foot away averages at 26dB SPL and peaks at 51dB SPL, which is about the same as the noise floor of an average office.
The microphone of the JBL Endurance Sprint is mediocre. In quiet environments, speech recorded or transmitted with this mic sounds relatively thin, and noticeably muffled and lacking in detail. In noisy situations, they struggle to fully separate speech from background noise even in moderately loud situations, like a busy street.
The recording quality of the integrated microphone is mediocre. The LFE (low-frequency extension) of 285Hz means speech recorded/transmitted with this mic sounds noticeably thin. The HFE (high-frequency extension) of 3.3KHz results in a speech that lacks detail and is noticeably muffled. The response between the LFE and HFE points is not very even either.
The microphone of the Endurance Sprint has a sub-par noise handling performance. In our SpNR test, it achieved a speech-to-noise ratio of 10dB, indicating that it is best suited for quiet environments as it may struggle to fully separate speech from background noise even in moderately loud situations.
The JBL Endurance Sprint have a decent battery life but no app support. They do not support the JBL Headphones app so you can't customize or EQ their sound profile, like some of the other similarly designed sports headphones within their price range, like the Jaybird Freedom. On the upside, they have a 9-hour battery life and a decent auto-off feature that helps them conserve a lot of power. They should have enough battery life to last you a full work day but they may not be the ideal option for really long trips or if you often forget to plug your headphones in at night.
The Sprint have a decent battery life of 9 hours and only took about 1.7 hours on average for a full charge. This makes them a decent option for the casual and heavy user, and they automatically turn off when inactive to conserve power, which extends their battery life. They should last long enough for most use cases but may not be the ideal choice for more heavy users with very long listening sessions. Unfortunately, the power saving feature can be a tad too aggressive and switches off after 5-10 mins which can be a bit frustrating at times depending on your use case.
The JBL Endurance Sprint do not come with a compatible app for added customization options.
The JBL Endurance Sprint are Bluetooth-only headphones with no audio cable or base/dock. They have a good wireless range but do not support simultaneous multi-device pairing or NFC. Unfortunately, they have poor latency and do not support any low latency codecs so they won't be a good choice for watching a lot of video content or for gaming.
These headphones do not have multi-device pairing or NFC support. On the upside, their hold-to-pair procedure is not difficult to use.
The JBL Endurance Sprint 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.
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 Sprint have a good wireless range. When the Bluetooth source was obstructed they reached up to 37 ft and can go up to 122 ft in direct-line-of-site. 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 JBL Endurance Sprint, like most Bluetooth headphones with no low latency codecs, will not be ideal for watching movies or gaming. They have about 240ms of latency which is a bit higher than average Bluetooth headphones and will not be ideal for latency-sensitive use cases.
The JBL Endurance Sprint are decent mixed-usage in-ears but better sports headphones. They have a lightweight and well built wireless design that stands out a bit more than other sports-oriented wireless in-ears, thanks to the slightly larger earbuds and thick ear-hooks. They also have a rubberized coating that gives them a stylish and decently high-end look and feel, but the audio cable is somewhat thin and flimsy. They also have a slightly uncomfortable in-ear fit that won't be for everyone, and that's not as stable as some of the in-ears and earbuds compared below. On the upside, they have decently balanced sound for most genres and provide good enough noise isolation to be a suitable option for most environments and use cases.
The Anker SoundBuds Curve are slightly better headphones overall when compared to the JBL Endurance Sprint. The Curve offers a better value for your money with a decently well-balanced sound and a better more comfortable in-ear fit than the Endurance Sprint. They also have a longer battery life and a slightly more stable fit since the in-ear seal of the earbuds is not affected as much as the Sprint's when the headphones move around. They also have a better more precise control scheme than that of the JBL. The Sprint, on the other hand, have a better design and more high-end look and feel. They also block more noise for busy commutes and have a few unique features like the magnetic ear hooks which some may prefer over that of the Ankers. They also have a slightly better-balanced sound than the Ankers although they do not get as loud.
The JBL Endurance Sprint are a slightly better headset overall than the Bose SoundSport Wireless. The Bose have a more comfortable semi-open earbud fit that most will prefer over that of the Endurance Sprint. They also support NFC pairing with mobile phones, have a better-balanced sound and a slightly more precise control scheme than the Sprint although it is a bit difficult to use due to the heavy rubber coating. On the upside, the JBL have a slightly longer battery life on average. They also have a more isolating in-ear fit which makes them a bit more suitable for noisy environments and commuting although they will not be as comfortable as the Bose.
The JBL Endurance Sprint are a much more versatile sports headphone than the Sony WI-SP500. The JBL have a better isolating fit that will block more ambient noise in loud environments. They have stable ear hooks and a better, more durable and water-resistant design than the SP500. The JBL also last longer on a single charge and sound much better although they may not get very loud. On the other hand, the Sonys are bit more comfortable than the JBL. They also have NFC pairing which makes them easy to connect to mobile devices.
The JBL Endurance Sprint are slightly better headphones overall than the JBL E25BT. The Sprint have a better build quality and a more sports-oriented design with IPX7 water resistance. They also have a better-balanced sound and a more stable ear-hook design that will prevent the headphones from falling off your ears when running or doing more intense physical activities. The JBL E25BT, on the other hand, are more portable and have a better control scheme. They also deliver a slightly longer battery life on average although they do not have an auto-off feature so they won't last as long the Endurance Sprint.
The Jaybird Freedom 2 are a slightly better wireless in-ear than the JBL Endurance Sprint. The Jaybirds have a smaller form factor that will more easily fit into pockets which makes them a bit easier to carry around on your person. They also have a more comfortable semi earbud fit that most will prefer over that of the Endurance Sprint and they have a customizable sound that you can easily EQ with the Jaybird MySound app. The JBL Sprint, on the other hand, have a slightly more rugged look and feel and deliver better noise isolation and lower leakage thanks to their in-ear fit. They also have a slightly more stable ear hook design for sports, but the earbuds do not stay in your ears as well as the Jaybirds.