First on my to do list was to put in an earth shattering stereo... (Being a teenager it seemed like a good place to start the mods.
I went ahead and got all my stereo gear from gold coast car sound in bundall on the gold coast.
I bought the following supplies...
An alpine CDA-9886i head unit
An alpine pdx4.150 amp
An alpine Mrp-m850 Mono amp
Focal 165kr2 splits for the front
Focal 165cvx speakers for the rear
An alpine 12 r type sub
A Toyota pocket kit
A dynamat bulk pack
And some cable, fuses and other little goodies
All together it came to around $5000 retail but I didn’t pay half that
I started by breaking down the car systematically so I had half a chance of being able to put it back together
Once the front seats were out I began to remove the door trim and the back seats
The picture above is of the rear wall of the cab
Above is the Rear left speaker (stock)
I then began to pull the old head unit out and fiddle with the wiring so that I could run the head unit from the stock power but use preouts for the speakers via an amp.
I then ran the power leads for the amps under the driver seat and the passenger seat where the amps would be located.
I then ran the speaker cable to each speaker location or crossover location (a crossover for those that don’t know is were the signal gets split into high and lower frequencies for the front split speakers)
Then came the fun part DYNAMAT. I began to dynamat all of the exposed steel inside the doors and the rear wall of the cab. Dynamat is a product that deadens sound and stops vibrations and rattles and retains sound and to some extent blocks out road noise.
Above is the rear right speaker location with the dynamat on the inside skin of the car. By the time I took this photo I had also finished the mdf speaker mounts which are made from 12mm mdf.
Above is a shot of the door once the dynamat was in and the crossover was put in place.
Above is a picture of the back seat with the rear wall of the cab exposed with the new dynamat. By the time I took this photo I had also put the speaker in.
After the dynamiting was in place I went about making the mdf mounts as seen in the photos above. The rear ones had no clearance problems what so ever however I did have trouble with the fronts. Due to the depth of the speaker the power window bottomed out on the back of the speaker so I made a mdf spacer and glued and screwed it to the mdf mount.
Once I knew that the speakers were all good I soldered them up and then linked the front ones up to the crossovers and then to the amp and the rears went straight to the amp. Then I screwed the speakers in place.
I then got a whole saw and went about drilling into the doors to make way for the tweeter. BE AWARE when using a hole saw on door make sure you measure 10 times before you get the drill. And when drilling drill from the inside out so that went you make it through the plastic you don’t leave halos around your tweeter you will notice I didn’t
I then wired the tweeter into the crossover and put the door trim and plastic dust sheet back.
Then I finished up putting the head unit in place and plugged in the leads running to the respective amps.
AND..... it worked
But it wasn’t over yet I was yet to make the sub enclosure
Subs are interesting and when taking the enclosure into account it can get a little bit technical.
For a sub to work well the box bust be of a certain size in my case with a 12" sub my box has to be between 45 and 70L mine is closer to 45. And also the port must have a certain surface are depending on the volume of the box NOT the size of the sub. My box has a volume of I guessed 50-55L so my port has 16 square inches of face. Yes I no it gets a little bit hard to understand. And being in an xtracab it was hard to come up with something that sounds good but here is what I came up with.
I started out with some 16mm thick mdf and went about cutting out the pieces I wanted for the box I had designed I then fiber glassed the inside of the box. Once the glass was dry I put it in the car to how it fits.
I then made a front for it and cut the hole for the sub. For a bit of fun I also hooked up a row of leds inside the port that is at the back of the box that is directed towards the roof of the car. At night it makes the back 6" of the roof a bright blue. (Very cool if I do say so myself)
I then had the box trimmed up by a mate and put the sub in then I put it into the car.
This is the finished result.
I have to say I am proud of my little DIY box and I suppose the entire system it is a nice clean sound and I got to know my car.
If anyone has any questions just ask.
Cheers SAM (davis.16)