Since this project is causing a bit of a stir now the video is up, people can see what I'm actually doing here. I could explain it forever, but now the video is there....
Resounding concerns...
A. Decapitation by targas
B. Glass being damaged
A. They are very secure, pure physics of the angle they sit in would not allow them to come forward into the car. The curvature of the boot and roof also wont allow this, it is a relative impossibility. However, since the concern is resounding, a simple fibreglass modification to the boot lid to 'stop' the targas on the outer edge should satisfy this.
B. An early consideration I had, although after further research, this is also highly unlikely. The free flowing space around the targas allow plenty of space for the resonating sound waves to escape. True, the vibration may take its toll on the seals of the targas, but who doesnt have leaky targas anyway.
Lets bring it down a few decibels.
Its only 2x10" subs and 2x6x9's!! I'm not in it for the sound off of the century.
Concerns about bursting glass is rather bizzare, since I dont see this on the Beast (massive install) or Artztogo (15", 2x12", 2x10" subs and oodles more speakers) threads, or the hundreds of other cars with FAR more decibels in their cars than I will ever have.
I don't drive around that often with the targas off anyway.I also don't intend on having the system at permanent full whack. It's built for sound quality not so much quantity. By the time all the sound deadening and padding is in place, there will not be too much to be heard from outside the car when it's all shut up.
If a was heading for a 1/4 mile race or a spin around silverstone, it just plain won't be in the car.
All in all, yes, I've researched the hell out of it. After all, safety first.
I thoroughly expect plenty to absolutely hate it when it's done, and some may love it. ... all I can say to that is welcome to modifieds lol