these new MKi's Dave have a 20w amp and will play through all 4 speakers. they link into the HU using ISO's and you can even get a module add on that allows you to using the cars oem steering wheel controls so that the entire system can be hidden from sigh....thats what ive concluded thus far, more info in the link below.
http://www.parrotshopping.com/uk/p_parrot_item.aspx?i=172822
if i wanted to upgrade the door speakers, run amps and subs would this be the best way of doing it. i dont fancy soldering etc etc inside the NCDC itself!
i do like the bluetooth handsfree and id probably go for the mki9000 so that i wont have to mount an ugly, non-oem screen in the car
Not sure you are interpreting that correctly !!
Also, is that a 20W combined, or 20W per channel ?
The ISO connections DO NOT allow the signal to go into the head unit, its purely a lead to allow simplistic connections, unless I am missing something one the ones I`m fitting anyway ! And the steering controls are to allow the answer of the phone call, but as far as I am aware, currently only available on vehicles that have this option on the wheel anyway.
Head Unit > ISO > Parrot > ISO > Speakers
If researching, the IQ play system sounds better - still poor quality, but then if you are adamant about retaining the original head unit, it still offers a solution.