150ohms DIY earphone speaker driver replacement materials were carefully selcected and ajusted by skillled engineers
of ELFINEAR.

We have got 2 versions of 150ohms speakers. one for bass,one for vocal.please check the difference in pictures.if you have any question about this,please feel

free to contact us.

Instructions
Please test the speakers
with a multimeter before soldering.

The colored spot is
for positive pole +, the other side is for negative -.
Soldering with less
than 3 seconds. Otherwise, the voice coil or circuit board can be burned out
easily.