[szjwt63v]

i'm still see issue out of phase(wrong speaker polarity) problem in some non major brand earphone.
it is wrong soldering wired R and L and GND.
Stereo Polarity (Phase) Sound Test http://www.audiocheck.net/audiotests_polaritycheck.php

 

[AstroTurf]

Great Site...
 
Thanks

 

[renanrischiotto]

This phasing thing is make my life hell.