Pretty Straight forward. I think that you'll find that the sub overpowers the HU and adding an external 4 channel amplifier is really a must.
As for the wiring, pretty straight forward. Get a 4 or 8 gauge OFC wiring kit for power/ground. As for the rest, all you need is a long pair of RCA cables, L/R. They will go from the subwoofer outputs off the deck straight into the back to the L/R inputs on the powered sub. These will do fine. I did my searches on
Ebay UK. if you can find them for less, just make sure they are shielded/twisted pair RCAs that reject noise.
I believe that if you use that Auto Start feature (ON), you won;t need to run a remote turn-on lead from the HU to the amp as it will sense the signal from the RCA inputs and turn the amp on. Sometimes they don;t work as advertised and the remote is needed (cutting off to soomn when signal is not present, or just not working as they should). Personally, you have the HU out and it has a dedicated remote turn on lead, that is the route I would take, remote out from the HU to the remote lead in on the sub. Make sure you select the Auto Start accordingly.
2-Channel Echo Series RCA Interconnect Cable, Length 17ft. Featuring Twisted Pair Technology for Maximum Signal Transfer without Static or Popping. Utilizing 99.99% Oxygen Free Multi-Strand Copper Wire Construction.
If you should elect to get an amplifier, get the six channel RCAs instead.
Here in green are some pointers.
Here are a couple of smallish amps that will vastly improve the system (night and day) from the actual 18-20 watts x 4 that head unit actually puts out.
This one is rather large but a good buy and quite powerful.
Class A/B 4-Channel Amplifier. Soft Turn on Circuit. RMS Power at 2-Ohms: 130W x 4 Channels (14.4v). RMS Power at 4-Ohms: 95W x 4 Channels (14.4v). Frequency Response: 20Hz – 20kHz. RMS Power at 4-Ohms (Bridged): 260W x 2 Channels (14.4v).
This is very reasonable
Amplifier Type: Class-A/B. In the event that Bass Junkies, at its discretion, may agree to accept the goods back the following conditions will apply End of Line Clearout. Land Rover. Pick Your Car. Car Stereos.
Driving is always more fun when you've got your favourite music pumping. Land Rover. Pick Your Car. Car Stereos. Car Sat Nav. Car Speakers. Car Subwoofers. Car Amplifiers.
Budget banger
This makes the use of adapters unnecessary, which is ideal for this type of application. Quantity: 1 Amplifier Number of Channels: 04 Max Power at 13.8 VDC 2 Ohms: 400W (4 x 100W RMS) Max Power at: 13.8 VDC 4 Ohms: 252W (4 x 63W RMS) Bridged at 13.8 VDC 4 Ohms: 400W (2 x 200W RMS).
If you don't get another amp for the 4 speakers then you just wire them from the HU using their respective labeled leads, Right front, left front, right rear,left rear as is documented with the HU.