[eeksll]

Hello, as in the title,

i have seen etymotic er4 binaural or stereo for sale .... what is the difference?

cheers

 

[mape00]

The answer is here.

 

[TacticalPenguin]

Binaural is made for specially mixed tracks which are created with the intention that they be listened to through headphones. Stereo is for more common music (aka 99% or more) which is made to be played through big speakers in a room or car.