Headphones are now produced by the millions of container loads ,, there has never been so many headphones manufactured probably thanks to the way people now listen to music. This is a good thing for us musicians who where used to paying over $100 for cans. Mass production brings the price down.
I'm a sucker for trying $15 headphones you'll see in dollar or discount stores.
I've seen the exact same headphones sell for $150 in a fancy box and a skull or some cool graphics added. I think it's the biggest consumer scam going. Ear buds too!
But for the most part I've had good luck if you know what to look for in the design.
My latest batch sound as good as any of the ones I own made by Sony, AKG, AT etc. Most of those all have issues. All headphones share one thing in common, flimsy cables that are easily destroyed by studio musicians. So I'm though with name brand cans.
With the $15 ones, I'll try one pair and if I like them I go buy a bunch.
When I travel I have done a lot of editing and listening with just my laptop and a pair of these $15 headphones.
I've even brought mixes very close to finished with them.
I'd post what brand but they have no markings on them !