Hi all,

A slightly different one from the norm this time I hope!
On my 8th XJ, love them, But..
My current 2000 XJR doesn't have the premiun HK stereo, so my query is will am I likely to gain any marked improvement by just replacing the rather nasty Phillips door speakers with some Harman K ones alone?
I am considering upgrading the whole system if possible. If that is the route I choose, will any of the wiring loom be already present for the amp and subwoofer etc?
Thanks in advance people!