I had soundmagic pl11 previously but it stopped working after 15 months,,,, although it was very good,after it i ordered soundmagic pl21 ,,, the sound quality is almost same as soundmagic pl11,,, no difference,, but the difference lies in build quality,, pl21 i more comfortable than pl11,, if you have this habit of plugging in earphone and sleeping then go for pl21,, else pl11 will do,,, as both have same sound,,,,and moreover pl11 is cheaper,,,,
I have soundmagic es18 and Sennheiser CX 180 Street II previously es18 lacks in bass only other things are awesome .cx180 is not durable enough i hav read more
The earphone that came with my Samsung Core2 phone is better. The PL21 has less bass and isn't as loud as the mobile phone earphone.