Originally Posted by UKenGB

So why would the radio need speaker connections? Normally there would be line level signal from various sources into a pre-amp that switches between them to feed the actual amp which outputs to the spkrs. But as far as I am aware, BWM tend to handle everything at spkr. level and simply boost it further with higher spec options. What would be the spkr. level connections between radio, amp, CD player, sub etc? Is there a clear diagram anywhere I could download?


I have a box in the LHS at the bottom. It is mounted at an angle and I had thought it was the Bluetooth module (I think I read that somewhere). The CD player, Nav DVD and other items I've put in that 'rack' will all come out as everything will be handled by the new head unit. I'll need to add sufficient line level wiring from head unit back to the amp which will go in that rack instead. And then it's just figuring out where the spkr. wires go and that's what I'd like to establish before I start. So I appreciate your help on this.