[psya]

Hello done NBT retrofit in E60.
I changed the 4 wires on the quadlock in order to get the 2 woofers working. So they work now.

Coded to Hifi/External Multichannel disabled.

Now sounds like crap. A lot of echo. And when car starts I can hear the speakers pop sound which is very annoying.

Any idea?

Thanks

You are not the only one
I have a e38 Nbt retrofited and it had the same problem.
On mine i am presuming the DSP is dear or something is wron with it.
I get a BUS Kolision erro on the dsp also, i don't really drive the car but when i do it is really anoying...