Or at least lets me change the volume of 1 of the sides relative to the other.
A common problem with headphones is one side is louder than the other..
I have returned some like that Cheaper Sony's
I got the same ones again but from a DIFFERENT store and they were ok.
But i don't use them.. they are for back up.
I still use a pair i got at Wallmart many yrs ago.
They get worked in with years of heavy usage so they have an edge on my new pair.
The same tech that is inside the $10 earbuds cost me over a $100 years earlier..
Neodynium rare earth magnet drivers.. prices have dropped hard.
I have experimented lots over the years.. cheap ones often sound great.
But it depends a bit on the person.
For example people swear by these Cheap Philips ones i got but i don't like them much.
For a while i was buying random ones from Newegg etc.. i have some still and gave away some others.
Staying with my old cheap Sony Earbuds
My old ones i used were a bit louder in one ear but in time it went away.
Expensive ones are expensive though.
And you would be surprised how well some are for $10
Sony are kings at making great cheap Earbuds !
Check out the Head-Fi.org forums for reviews etc.
That is where Headphone's aficionado's go
If it was me i woudl look into turning up volume on one side
AND i would inspect it carefully.. earbuds ?
Dirty ? manufacturing defects you can mod / fix ?
But you didn't say what you are running.. Windows ? Android ? RockBox ?