Dont buy es18 . i bought it after some guy in this forum recommended it to me. After a month the left side went dead.
Just buy a Sony,JBL or Creative. Soundmagic and other Chinese brands have inconsistent build quality. Some ppl praise it some people hate it. U need to be lucky with these products.
u should have tried to get a replacement. es18 is pretty good, i am using 1 for more than a year, no issues. and sound quality is decent for what u pay for, the upper / higher freq is a bit fuzzy, but overall good bassy sound quality.