Hi Yungquan,

I've recently DIY to revamp the stock audio system, current configuration is:

Stock -> AMP -> speaker-out-> Audiocontrol EQS-> TruBillet -> Morel Elates 6

the frustrating thing is , i'm hearing moderate level of hissing from the tweeter , it is quite apparent when playing piano music(when a key strikes the sound got distrorted) , i'm suspecting the speaker level out is introducing such noise...

I did try to tap on to the pre-amp out but the problem is i'm unable to control the volume from the Head Unit .

I'm interested to know did you experience such problem? did you tap in to the preamp out for your audison bitone?

Cheers