Originally Posted by
veebs
For 2010-2011 (I think), the door cards have a plastic blanking section that you would need to cut out in order for the extra speaker to be mounted. My door cards were stuffed on top, and rather than fixing that, I ordered two 'new' ones from Triumph, from L7 equipped cars (I wanted the badges). That meant as a bonus, the extra speaker was already installed, skipping the whole cutting process.
Once there is somewhere to mount the extra speakers, you need to rewire the doors, as the stock setup is a single line running to the door, which splits to drive both the bass and tweeter in the door. The L7 setup is two lines to the door - one that drives mid and tweeter, and a second that drives just the bass.
I ran an extra cable to the door (through the footwells and door grommet thing) and used that to drive the bass. The existing cable was cut after the split to divert from the bass to the new mid. The new cable was then spliced to the cut wire to drive the bass. Splicing the cables meant I could retain the existing speaker plugs (which turned out to be a stroke of genius, given I needed to replace them only a month or two later, and this made it a plug and play experience).
The new mid drivers I didn't have the OEM plug for, so I soldered directly to the speaker, and added my own plug from Jaycar to allow the card to still be removed if needed.
That process obviously repeats for both front doors.
I bought new D pillar covers with the surround speakers in them, and soldered a pigtail with plug to these too. I ran cables from them to the front of the car along the right door sill.
There is an additional mid speaker in the centre of the dash - the cable and plug mercifully already exists, so that is just popping the grille off, adding the speaker and seal, then replacing the grille. The cable runs to the driver footwell, where it needs to be extended to the amp location under the driver seat. The extra cables from the doors and D pillars also get pulled through to that point.
I bought a Logic 7 amp out of the US, and paid slightly over the average price to get one where the seller had chopped the cables, rather than unplugging. This had two benefits: The fibre module would be more likely dust and scratch free, and I had extra plug pins I could extract and add to my car.
I spliced in the pins to the new cables I had run (4 from the door cards, 4 from the D pillars, and two from the centre, bearing in mind with audio, there is a + and - to run for each) plus, needed to repin a few existing cables that were moving from one plug to another on the amp. (the green plug has larger pins than the grey from memory)
Plug everything in and test - incredibly before updating the CCF it started working just fine (the amp is obviously hard-wired to specific speakers at specific pins).
Updating the CCF to Amp type 4 meant I got the Logic 7 option on the headunit, which when enabled, starts driving the Centre driver and D pillars to make the sound seemingly come from the dash itself, rather than the door - this is the 'surround' effect the brochure promises.
All in all, it's not for the faint hearted, and I did this over the course of a few weekends. You definitely need to be comfortable with a soldering iron.
I stole the diagram attached to help in repinning, and read a bit on Cambo (Old Jaguar)'s facebook page and Disco3 forums to give some comfort I could do it. I studied the workshop manual wiring diagram to make sure the new speakers were the same diameter as the OEM spec (I overshot a few, but figure going bigger is OK - smaller is a risk to resistance).
All parts were sourced used through eBay, generally out of the UK. I collected them over the course of a few months, just keeping an eye out for good deals. There are a few out there offering the entire speaker packages, which I would do next time, rather than opening the doors up multiple times as I ended up doing.
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