ok I have a siren/pa and a siren speaker the dimensions of the speaker are 5-3/5"H x 5-3/5"W x 3"D and it needs to be on the outside of the vehicle so it can be heard does anyone have any idea where i could mount the speaker i/e behind the grill or under the car or something? oh and the car is a 2010 mustang GT

 

Lol why do you have one of those? Just put it in the engine bay, the speaker for my alarm is about 3 inches in diameter and you can hear it just fine. Mine is mounted to my shock tower, mount it facing down.

 

Can i have a pic of it and i think mines to big i cant find a single place to put mine, but please post a pic it would be mighty helpful,