Install guide

I recommend that you take a weekend to do all the interior cabling. First of all, take out the front
seats (make sure the battery is disconnected when you do this and that it remains disconnected until
you reconnect the seatbelt pre-tensioner connectors under the seat or the dreaded airbag warning
light will come on). The seats are easy to remove, just undo the allen bolts on the seat runners (two
at the front, two at the back), unclip the pre-tensioner cable lock and pull them out. Then clear out
the interior as much as possible and get all your cables run in one go – You can give the interior a
good clean while you are at it too. This way you can connect up all the cables at the back of the head
unit, finish fitting the head unit and put everything back so the car is driveable. You will be left with a
whole load of cables in the boot, but at least you can then work on finishing that part in your spare
time whilst still having a driveable car. y
7 – Fitting a subwoofer
A subwoofer is simply a big speaker that reproduces low audible frequencies. The human ear hears
sounds in the frequency range of 20Hz – 20,000Hz. Your tweeters will take care of high frequencies
from about 2,500Hz upwards and your mid range speakers will take care of frequencies between
about 100Hz – 2,500Hz. This takes care of most of the frequency range we can hear, but you’ll be
surprised just how important those low frequencies are. A subwoofer will take care of the frequencies
roughly between 20Hz-100Hz. Obviously this is essential if you really want to hear your music as it is
supposed to sound.
You can buy subwoofer drive units (speakers) on their own or you can buy a sub complete with an
enclosure. A sub needs an enclosure to work properly due to the amount of air a speaker that big
moves. The biggest problem you’ll have with fitting a sub is finding the space. For this reason I opted
to buy a drive unit and build my own custom enclosure, I suggest you do the same if you are planning
on fitting a subwoofer to your car.
A 10” sub is more than sufficient for the GTV, it’s a small car so it doesn’t need to move a lot of air.
The best sub speakers available today are made by Rockford Fosgate and Lightning. Accept nothing
else. Also, remember that you will need an extra single channel (or two channel for dual voice-coil
subs) amplifier to drive the sub, try to get one that matches the 4-channel amplifier you are using to
drive your interior speakers.
The most obvious solution is to build a box that fits into the corner of the boot, this is fine and I used
this solution for a while myself. However, as you will have to have a small box, it will need to be