Anyone here work on a Jags audio

mikegett · 07-21-2006, 09:23 PM

I have been doing some research and found little answers. My mother in law has a 95 Jaguar XJS V12. They use a Harmond Kardon amp, speakers, and sub for the audio. She would like for me to place a Navigation unit in the Jag but keep the amp and speakers. I haven't been able to pull the HU to do any checks, but I do have some concerns. I was told by a member on caraudio that the crossovers are passive and after the amp. I would like to confirm this if possible. My other concern is over the ground. I have vague knowledge of the older positive ground systems, and I have confirmed that 95 Jags were made with positive and negative grounds. A current HU placed into a positive ground system without a polarity inverter will fry the HU. Is there anyone here that cold explain the positive ground. Is it based from the battery or the electrical componants? Can a simple ground to chasis fix the ground and how will it appear on a ohm meter? I haven't confirmed if the HU sends line level or speaker level signals to the amp. Either way, it will be a AC signal. I am assuming that since AC has no polarity, it won't hurt to run a new HU into a positive ground amp. Is this correct? Thanks for any help. Mike Gettinger

Cliff8928 · 07-22-2006, 03:29 AM

I don't know if it would fit, but they did make a head-unit for the '95 with navigation from the factory.

mikegett · 07-22-2006, 02:56 PM

Those navigation units were voice navigation. They didn't show directions and concisted of a add on brain box. I work for Fujitsu, so I would be ordering the avn7000 for her. Possibly the double din if it will fit in the opening. I did find a website jag-lovers.org that helped out. As I suspected the power is a positive ground and requires a polarity invertor. The HU sends out a low level signal to the amp. I am still searching for the pin out so I can convert the wires to RCA. It looks like the only din adaptors are produced and sold from the UK. MY glassing skills suck, so I guess we will need to bite the bullet on that one. Thanks for the help. It will take a few weeks for me to get the HU ordered and installed. I will post some pics when done. Mike Gettinger