I have just installed the Edge 10" active sub from halfords. £89. Very good bit of kit for under £100. It is a perfect tight fit at the rear of boot.Such an improvement. Tweeter upgrades is all it needs now.
Head unit (clarion)and active sub £188. Facia adaptor £14 ish.
I am not sure what speaker set up I have standard. Its a 07 3.0 SI. Perhaps 10 speaker.
The Edge 10" gets full marks from me. Totally transformed my sound. Can not recommend it enough.
For remote I just took it off the blue and white wire from the clarion head unit.



