For anybody who wants them here is a few documents and brochures for some old whelen sirens. (4000 series,2800 series, and a 1988 whelen systems brochure.) https://drive.google.com/file/d/0B42g5dWFC1QBWm1QS2JNcDg5SmF2WVc2SDhRNWgwXy1tbUJr/view https://drive.google.com/file/d/0B42g5dWFC1QBdURnNG0tM0Jl...