When comparing AKG K391 NC vs Jabra Elite Sport (2017), the Slant community recommends Jabra Elite Sport (2017) for most people. In the question“What are the best headphones?” Jabra Elite Sport (2017) is ranked 26th while AKG K391 NC is ranked 61st. The most important reason people chose Jabra Elite Sport (2017) is:
In this mode, the mic picks up audio from your surroundings. You can hear sound from around you mixed in with your music.
Specs
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Pros
Pro Good accessory bundle
The accessories included are all very useful. You get two 3.5mm headphone cables, a USB charging cable, silicone ear tips, a travel pouch and an airplane adapter.
Pro The headphone cable can be detached from the control module
You can easily replace the 3.5mm cable should it get damaged. You can detach the 3.5mm cable from the control module which is very convenient. Other noise cancelling modules have fixed cables, so you’ll have to replace the headphones should the cable get damaged.
Pro Integrated microphone
You can take calls with these headphones on. A microphone is integrated into the remote which makes answering calls fast and convenient.
Pro Decent active noise cancelling
A good amount of noise will be blocked from mixing in with your music. Loud, low-pitched sounds may still be clearly heard though
Pro Compact noise cancelling module
You aren’t likely to have issues using these on the go. Most active noise cancelling in-ear headphones have large control modules, while the K391NC has a fairly compact and light module. You can easily use these headphones while walking and comfortably enjoy active noise cancelling with your music.
Pro Fairly detailed and rich sound
The highs are quite detailed, yet do not get harsh. The mids are slightly forward, so vocals and instruments can easily be heard. The bass is not very powerful but is tight, so you’ll get decent punch from your music.
Pro HearThrough mode allows you to better hear your surroundings
In this mode, the mic picks up audio from your surroundings. You can hear sound from around you mixed in with your music.
Pro Can monitor fitness stats
There is an integrated heart rate monitor which can connect to Jabra's fitness companion app. This combination should make it very easy for you to see fitness related data.
Pro Balanced sound signature with clear highs, rich mids and controlled bass
The Elite Sport sounds quite balanced with no harshness or muddiness. The highs are clear and deliver good detail. Mids sound natural and rich, while the bass is tight and controlled instead of bloated. With these headphones, you will get decent punch from the usually bass-centric workout tracks, yet you will still be able to enjoy a refined sound when listening to more mellow or instrument focused music.
Pro Can be used during workouts or while raining
These resist sweat and other liquids as they are IP67 rated. They can be submerged in water without getting damaged as long as the water is not too deep and they are not submerged for a long time.
Pro Optional wing tips improve fit
You can attach wing tips to the earpieces, which allow for better in-ear fit for reduced chances of the earpieces falling off. The tips are quite soft so they will not have too much of a negative impact on comfort.
Pro Earpiece buttons allow playback/call control
Each earpiece has two buttons which you can use to control playback or to answer/end calls.
Pro Can easily be charged on the go
The charging case has an internal battery that can add up to 6 hours to the Elite Sport's battery life.
Pro Allows you to take calls
There are microphones integrated in the ear pieces so hands free calls are possible. Voice quality from the mic is actually pretty good.
Pro An extensive accessory pack is included
You get a charging case, 3 pairs of silicone ear tips in different sizes, 3 pairs of premium Comply ear tips in different sizes, 3 wing tips in different sizes as well as a charging cable.
Cons
Con Limited inline controls
The inline remote only allows you to play, pause, and skip tracks. You can’t control volume levels though.
Con Battery life is not very good
On average, you'll only be able to get around 3 hours of playback time from a full charge.