Tom’s Guide Verdict
While the EarFun OpenJump earbuds might be cheap, they certainly arent cheerful.
This can make them some of thebest running headphonesaround unfortunately, though, the OpenJumps fall short.
The touch controls are unreliable, making for an all-round finicky experience and the call quality is abysmal.
Left: Ashley’s EQ, Right: Nikita’s EQ
If you hadnt already guessed, I cant advise you to buy these buds.
Find out more in my full EarFun OpenJump review.
Thankfully, the earbuds themselves feel pretty sturdy but the ear hooks come off as poor quality.
The plastic just feels flimsy, and the rubber discolors quickly.
Theyre not the best-looking earbuds overall, either.
While they arent open ear, theJLab Go Air Sportearbuds will most definitely look and feel better.
They also have an IPX7 rating meaning theyre protected against sweat and rain making them suitable for outdoor sport.
As a glasses wearer, I found the earhooks themselves uncomfortable to deal with.
The open-ear design of the OpenJumps helped me feel comfortable when out and about, especially near traffic.
SBC is the default audio codec for Bluetooth devices, so this is standard.
I dont have this issue with any of my other earbuds so this was frustrating.
The EarFun OpenJump buds have 4 mics that eliminate background noise on calls.
I tested this out by calling my mom while I was walking home next to a busy road.
However, on my end the call was awful.
My moms voice sounded horribly robotic and was full of static.
Left: Ashley’s EQ, Right: Nikita’s EQ
It actually sounded like I had a robot voice effect applied.
This poor sound quality was unfortunately an omen of worse things to come.
However, to give them the benefit of the doubt, I tried out the personalized sound profile.
I set my phone at its highest volume and the app played a dripping sound.
I adjusted on-screen sliders until the drip was no longer audible, signifying my custom profile was complete.
I asked my colleague Nikita to try out the My Sound Profile test too.
The mids on my own profile were low whereas Nikitas were more varied.
But the Rock EQ preset left me disappointed the mids sounded awful and tinny.
The default EQ was even worse.
The only setting that sounded good was the personalized profile.
EarFun claims this gives a rich and impactful bass experience without compromising sound quality.
I listened to Jumpsuit by Twenty One Pilots for this test, but the bass just sounded completely muddy.
There was nothing elevated about it.
The manufacturer says this technology can enhance bass response without distorting the mids and highs.
Youre probably not shocked to find I disagree.
It ruined the mids.
It even made the vocals sound warped.
The mids became robotic and distorted in every song I listened to.
In drum-heavy songs the music just sounded tinny and ear-piercing.
I listened to Kickstart My Heart by Motley Crue and it sounded horrific.
There was near constant crackling and it didnt even sound like Motley Crue.
Again, I tried multiple presets and customized the EQ, but the tinny midtones were inescapable.
I then tested a slower song, Noah Kahans Call Your Mom, and was pleasantly surprised.
The earbuds carried the delicate tones of this song really well.
I think this is down to the fact there was nothing to challenge the 14.2mm wool composite drivers.
On top of all this, the OpenJumps sound leakage is awful.
Sure, they are open-ears so some music escaping into the world is inevitable but not to this level.
My colleague sitting two metres away from me could hear everything.
The app is clunky and hard to use when compared to companion apps I have tested in the past.
The app also offers Game Mode and Theatre Mode, however I cant say they were particularly effective.
I found Theatre Mode only increased the volume.
Streaming Friends, for example, just sounded tinny.
The case can be charged wirelessly or with a USB-C cable.
EarFun OpenJump review: Verdict
The EarFun OpenJump earbuds left me pretty disappointed.
While theyre cheap, they are unfortunately not so cheerful primarily thanks to absolutely terrible midtone performance.
