QUOTE(nejordida @ Mar 6 2017, 11:29 AM)
Hi jlyeow!
U r spot on bro! Mine is iPhone 6S too. I am using aux cable too. But there's a problem there as well. If I use the aux cable and put my phone on charge through one of he USB ports, there's a hissing noise... something like what u have when FM radio signal not available.
I'll try to change the aux cable first and then test it again.
But yeah, I agree with u, no one reported this problem before u and I 😝
Hi nejordida,
Finally someone from the same channel!
This treble distortion issue started when I was still with my iPhone 5 (playing on the same HU as the current one). However I don't have the hissing noise when it's on AUX cable so I suspect it could be due to poor quality AUX cable, or probably it's picking up those electrical disturbances. I do get some alternator whining noise when the AUX cable is not properly plugged in (to either HU or phone) and what I'd do is just simply shove it in and give it a good left-right twist and it's good to go.
Whenever my phone is on AUX and charging cable simultaneously (via car charger), I do get very minimal electrical buzzing noise but as soon as the music plays through, that noise just doesn't bother me much.
Try get a decent AUX cable and see if it's still picking up the unwanted noises.
Cheers.