Hi everyone, I'm here for two years ago for read and learn but this is my first post. I have a '97 XK8 and I'm from Barcelona, and I need your patience for my bad and poor English.

Until now in my audio system, I only replaced the three signal stereo wires of CD changer to a new cable with 3,5mm mini jack socket for connect my iPod in the central glovebox, but now I have two speakers broken and I want a new and better system.

It has the Standard audio (the first model of head unit with four Phillips all-range speakers) and I was the intention to upgrade to the Premium system (same HU but with harman/kardon 8 channel amplifier and separate range speakers) and I bought a used amplifier in eBay for a very good price.
But now, after read a lot about, many people says that the Premium system isn't better than any aftermarket system with amplifier for less money.

Now I have a new HU (with BT telephone!) Kenwood KDC-BT53U and four speakers and tweeters KFC-E170P, and I want connect all with the original harman amp.

I have the Electrical wiring diagram and I know each connection of the harness with Multilock 070 connectors, but I have two problems:
- I don't know how connect each RCA low level outputs of HU to inputs with normal cable (because the amplifier only has one signal ground for four low level inputs).
- And I don't know how is the impedance of the original dual coilvoice subwoofer, for buy an aftermarket similar option.

If someone can help me I will be very gratefull.

thank you very much and congrats everyone for this amazing site

 

Welcome to the forum Abernathy,

I have only posted to say 'hola!' as I can't offer any help with the audio upgrade. I'm sure the audio experts on the forum will know the answers to the RCA and impedance questions.

Graham