I'm currently trying out the jam ultra truewireless buds. If you like bass and lots of it, then this is the truewireless ear bud to get, I tried a few true wireless buds like the Jabra elite, Samsung iconx, bragi dash, sol amp airs, jaybird x3, Plantronics, cheap Chinese ones, and these jams ultra beat them all with BASS! it goes unbelievable deep, ear buds are not supposed to go so deep! I would say the other frequencies do suffer some from all this bass but not so bad that you cannot enjoy them. These would be great for gym duty or back ups, not critical listening. I am going to put a quick and dirty cons and pros list here. hope this helps some....
PROS
Did I mention these have tons of bass. if your a bass head and want true wireless get these. they remind of beats headphones or the sony extra bass headphones.
Price 99.00 is pretty cheap compared to the competition.
Very light buds, not heavy on the ears.
Sweat proof.
Fit is good, they don't stick out much.
Battery life is rated 3 hours I got a about 3 hours and 40 mins. the first time out, not bad at all.
The Jams can get very loud.
Charging case has 10 more charges plus you can charge other devices with it.
Very important, Bluetooth connection is rock solid! The best I have gotten yet. no drop outs at all, indoors or out!
The Jams automatically connect when taken out of case and disconnect when put back into magnetic case, slick.
isolation is almost 100% I cant hear anything with music on, even people talking right next to me, pretty good.
CONS
Build quality is all plastic, that's why its so light.
With all this bass you do lose a lot of details in the highs and mids.
Bass is very strong, thick and deep but lacks texture.
No volume or track controls, just pause, play and answer calls.
Case is a little cheap, looks nice but cheap plastic just like the buds.
At louder sound levels you can hear some distortion, maybe they still need to break in.
should have better indicator lights for charging status on buds and case.
some fatigue when listening for long periods, bass is strong, it rumbles so ears get tired after long sessions.
I am thinking about keeping these as back ups or for when I want some fun with that extra bass.