So I got 2 Orion HCCAs i want to hookup in the trunk with a monoblock amp and also throw a 4 channel amp in for the interior speakers. Has anyone done this? and if so, please help me and show me the way. Ive done plenty of aftermarket stereo and amp installations before, just not on a BMW or without changing the head unit. If you have a walkthrough of what to do please help me

 

Use this. PM Technic he makes the PnP harness.

Notes on a 2011 335is trunk sub install with the Harman Kardon system

 

Thanks for that but i have to make another account for them and what not and then i have to post a certain amount to pm. Anyway you could get a price for me? Ill buy it or show me where to get it

 

PM him here.
https://5series.net/forums/private-m...ilt-loc-99857/

 

Thanks alot man