This converts my stock honda stereo ..both aux or ipod through the CD changer output.

Link

This thing has two outlets one to connect an ipod interface (ipod charger port) and another to connect aux-in line.

So when I connect this thing... my left speakers as only MUSIC and NO voice (or deep bass). My right speakers are perfect. I tested it out by using the Balance on the stereo. Radio/CD sound works perfect.

I just want a general idea of what this means, when one side would only hear Music w/o the voice. (its like its filtering either some frequencies..)