Here are two different GSP set ups (not my pics, BTW) with the speakers in different places
This is a trooper who added a bunch of stuff to his car Police Vehicles (#4241) | Flickr - Photo Sharing!
and this is a special anniversary edition where they told the up fitter to pretty much add every light they had Police Vehicles (#4244) | Flickr - Photo Sharing!
Personally, I would put the speakers on the bottom of the push bumper like in the 2nd pic, with one on each side, and the light on top of the mid bar. Only reason I wouldn't put the speakers behind the grill is IDK who much two would restrict the air flow. I also wouldn't put the light behind the grill because I don't think it's as bright.
This is a trooper who added a bunch of stuff to his car Police Vehicles (#4241) | Flickr - Photo Sharing!
and this is a special anniversary edition where they told the up fitter to pretty much add every light they had Police Vehicles (#4244) | Flickr - Photo Sharing!
Personally, I would put the speakers on the bottom of the push bumper like in the 2nd pic, with one on each side, and the light on top of the mid bar. Only reason I wouldn't put the speakers behind the grill is IDK who much two would restrict the air flow. I also wouldn't put the light behind the grill because I don't think it's as bright.