probably. i called to the store and talk to them. they ordered today next ephs to be able to exchange mine. i need to provide them to the store and they will check if its defective. i hope they are fine guys and will not try to trick me in something like 'its fine, maybe its your ear problem'.
Hope you wont have an issues exchanging them. :)
Don't give up on the Yams...
Same here, bought from Audio Affair... 3 months down the line no issues at all.