(G) just wondering

i have just bought a new putno and was just wondering how i could keep the standard head unit but upgrade the speakers and maybe add some subwoofers. do i ned any adaptors if so where can i get them from? thanks alot

Same here!!! - I want to keep the head unit and keep all the features. I have struggled to find a definite answer to what is on the back on the head unit (pre-outs, etc)

Would love to add an amp and sub in the boot. There are threads for the speakers to be upgraded, but is there an option for RCA leads or would it be easier to get a four channel amp and perhaps connect it using high level inputs and take the signal from the back speakers.

I'm just guessing here but any feedback would be great :-)

On blaupunkts, you need special adapters to give you rca outputs. look here to see what i mean.
http://www.bluespot.co.uk/stock/preamp.asp

deeyup