As a follow up to my ďglove box sub boxĒ how to I thought I would show how I built the latest addition to my TF, some A pillar tweeter (APTís) builds.
For those of you that havenít a clue as to what I am on about I will try to explain, the tweeters in a standard MY200F/TF are positioned reasonably well, but thereís always room for improvement. By moving the tweeters up into the A pillars it increases the sound stage (stereo effects) thus making the listening experience more enjoyable and accurate.
Before you start you will need:-
Fibreglass resin + catalyst
Cheap paint brushes
Material to cover builds, I used Vinyl.
Hot glue gun
First you will need to aim the tweeters. This is usually done by placing some blue tack on the rear of the tweeters and sticking them to the A pillar trims and moving them around until a satisfactory sound pleasing to YOUR ears is achieved. The aiming of the tweeters should not be rushed into, you should listen to some music that you are familiar with so that you can get the sound spot on, this can take many hours to get just right, do not rush it. Once this has been achieved mark the height/placement on the A pillar trims with some Tipex or such like.
The tweeters should look something like this:-
Making a start
Next you will need to remove the APTĎs, first fold the hood back and make a start by removing the two screws that hold the sun visors on and remove them and then the sun visors:-
Next up remove the metal clips that hold the soft top to the windscreen, these are held in place by two Torx screws (T27S), unscrew these and remove the clips:-
Now place you fingers, windscreen side, under the top trim above the mirror, pull down sharply to remove. Repeat this with the A pillar trims on either side, work from the top down on these.
The build begins
By now you will have an idea of where the tweeters sound best and you will need to make a hole to help the fixing of the tweeter cup and the wire.
Now you need to make some tweeter cups, I used a pillar drill and hole saws but if you are careful a jigsaw could be used, this is what the cups for my tweeters looked like:-
These now need to be hot glued to the APTís as close to the position that you found best for your ears, donít worry if they are not spot on at this stage as you will be able to adjust them later:-
Refit the APTís to the car and aim the speakers once again using the tip of the glue gun to melt the hot glue and also add some more when your ideal position is reached (this part can take some time). When you are satisfied with the position carefully take the APTís off and make some legs for the cups to add some strength:-
Once the cups are in the correct position try them out again, you can never do this enough times! Now take the APTís off again and check that they are a mirror image of each other, if they are you are now ready forÖ.
The messy stages.
Start by giving the tweeter cup side of the APTís a rub down with some coarse sandpaper, 60 grit is what I used, to give a key for the resin, also turn the APTĎs over and key the edge of the rear of the APTĎs . Once you have done this you will need to attach the speaker cloth to the APTís. Turn the APTís over and Working a small area at a time run a small amount of hot glue along one of the keyed edges, as you attach the speaker cloth press down firmly on the cloth to make sure that it sticks well to the APTís, also try to squash the glue line down as you do not want to add unnecessary bulk to the rear of the APTís. When you have attached the cloth along one complete edge it now gets a little harder as you will now have to do the other side and this needs stretching as you are doing so, 8 pairs of arms is handy here! Alternatively a partner or friend will do. Now trim the excess material off leaving an overlap of around 10mm:-
When you have finished they should look like this:-
Try to keep the material at the top end of the APTís a tight as possible:-
You will need to poke the material through the tweeter cup to achieve a smooth and flowing shape to the builds, to do this I used a measuring spoon from the kitchen to push the material whilst hot gluing the rear, when doing this some talcum powder on the rear of the spoon will help to stop it from sticking as will rotating the spoon slightly too:-
Note hot glue:-
Cont in part 2......