Best way to wire 'plug & play' active sub and speakers with crossovers?

Hi, thanks for taking the time to reply.  I've connected the speakers as described, and they work, albeit the overall sound is a bit tinny/top end with the equalizer settings at neutral/flat...which leads me to the conclusion that the potentiometers (Lo & Hi pass and 'Subsonic) on the sub/amp aren't set optimally. 

I asked Focal what should be the proper settings for the potentiometers expecting they would know given it's a combination of all their products, but response I finally got was "...please contact a retailer.

They seem to be suggesting that respective retailers have better technical understanding of the integrated performance of their products than Focal itself?  Perhaps retailers are supposed to have a better understanding of the installation manuals than those who wrote them as well?

I'm staggered.  What a way to treat customers who paid more than £1000 for the combination of their products!

I'm also struggling with the so-called 'plug and play' harness on the iBus2.1. The headunit is reset every time the ignition is switched off.  

When I put a multimeter on the car's ISO power connector pins none of them are actually live when the ignition is off, which makes me wonder if the CAN Bus is involved somehow, and the Focal harness is somehow conflicting with it

Any ideas?

I looked for a pin diagram in the Focal manual, but there isn't one. Looking at their harness itself, it seems not to change the pin positions on the power part of the ISO connectors.There is an obscure reference in the manual which I don't understand: 

Auto Power On: In ON mode, it's not necessary to connect the remote cable if you're using the high level inputs. Do not function with the RCA inputs. However, we prefer the direct remote wiring on a “plus after contact” (cf Nb 3).

Click to expand...

No idea what this means and there appears to be no note 3.