Had possession of a Federal Signal Rumbler a while back, and got to looking and really couldnt see where there was much to it... So I took one of the "speakers apart and this is what I've found.
Its made entirely of SCH40 PVC pipe that is painted. Its a short piece of 6" pipe, a flat cap, and a domed cap with some "vents" cut into them. Inside, a small 6" subwoofer/speaker is mounted. Its SIMPLE. Maybe 20 bucks worth of PVC material that is all painted black. Pics are below.
Up close of the flat cap middle
![ai95.photobucket.com_albums_l128_firefighter_2000_Rumbler_100_2354.jpg ai95.photobucket.com_albums_l128_firefighter_2000_Rumbler_100_2354.jpg](https://elightbars.org/forums/data/attachments/120/120335-526798ec056cf2d9026f121cff8d7b68.jpg)
The rounded cap, inside:
![ai95.photobucket.com_albums_l128_firefighter_2000_Rumbler_100_2358.jpg ai95.photobucket.com_albums_l128_firefighter_2000_Rumbler_100_2358.jpg](https://elightbars.org/forums/data/attachments/120/120336-f158d8a079d0efb2ffdb15e8829e90e1.jpg)
With the rounded cap removed.
![ai95.photobucket.com_albums_l128_firefighter_2000_Rumbler_100_2359.jpg ai95.photobucket.com_albums_l128_firefighter_2000_Rumbler_100_2359.jpg](https://elightbars.org/forums/data/attachments/120/120337-c6858869803827d68b111dcc4e51548d.jpg)
Speaker/Subwoofer removed
![ai95.photobucket.com_albums_l128_firefighter_2000_Rumbler_100_2355.jpg ai95.photobucket.com_albums_l128_firefighter_2000_Rumbler_100_2355.jpg](https://elightbars.org/forums/data/attachments/120/120338-5968588b9a40985750bdfe4bcf823b10.jpg)
Top view. Notice the thickness & the holes drilled for the speaker/subwoofer
![ai95.photobucket.com_albums_l128_firefighter_2000_Rumbler_100_2353.jpg ai95.photobucket.com_albums_l128_firefighter_2000_Rumbler_100_2353.jpg](https://elightbars.org/forums/data/attachments/120/120339-c2506776e05b0851b406c5d6a29998ac.jpg)
The speaker/subwoofer
![ai95.photobucket.com_albums_l128_firefighter_2000_Rumbler_100_2357.jpg ai95.photobucket.com_albums_l128_firefighter_2000_Rumbler_100_2357.jpg](https://elightbars.org/forums/data/attachments/120/120340-dfd9b46c0bed64ab943c756017f1c5d7.jpg)
![ai95.photobucket.com_albums_l128_firefighter_2000_Rumbler_100_2356.jpg ai95.photobucket.com_albums_l128_firefighter_2000_Rumbler_100_2356.jpg](https://elightbars.org/forums/data/attachments/120/120341-c098655ea9f2e5e30280d4280d9974ab.jpg)
Its made entirely of SCH40 PVC pipe that is painted. Its a short piece of 6" pipe, a flat cap, and a domed cap with some "vents" cut into them. Inside, a small 6" subwoofer/speaker is mounted. Its SIMPLE. Maybe 20 bucks worth of PVC material that is all painted black. Pics are below.
Up close of the flat cap middle
![ai95.photobucket.com_albums_l128_firefighter_2000_Rumbler_100_2354.jpg ai95.photobucket.com_albums_l128_firefighter_2000_Rumbler_100_2354.jpg](https://elightbars.org/forums/data/attachments/120/120335-526798ec056cf2d9026f121cff8d7b68.jpg)
The rounded cap, inside:
![ai95.photobucket.com_albums_l128_firefighter_2000_Rumbler_100_2358.jpg ai95.photobucket.com_albums_l128_firefighter_2000_Rumbler_100_2358.jpg](https://elightbars.org/forums/data/attachments/120/120336-f158d8a079d0efb2ffdb15e8829e90e1.jpg)
With the rounded cap removed.
![ai95.photobucket.com_albums_l128_firefighter_2000_Rumbler_100_2359.jpg ai95.photobucket.com_albums_l128_firefighter_2000_Rumbler_100_2359.jpg](https://elightbars.org/forums/data/attachments/120/120337-c6858869803827d68b111dcc4e51548d.jpg)
Speaker/Subwoofer removed
![ai95.photobucket.com_albums_l128_firefighter_2000_Rumbler_100_2355.jpg ai95.photobucket.com_albums_l128_firefighter_2000_Rumbler_100_2355.jpg](https://elightbars.org/forums/data/attachments/120/120338-5968588b9a40985750bdfe4bcf823b10.jpg)
Top view. Notice the thickness & the holes drilled for the speaker/subwoofer
![ai95.photobucket.com_albums_l128_firefighter_2000_Rumbler_100_2353.jpg ai95.photobucket.com_albums_l128_firefighter_2000_Rumbler_100_2353.jpg](https://elightbars.org/forums/data/attachments/120/120339-c2506776e05b0851b406c5d6a29998ac.jpg)
The speaker/subwoofer
![ai95.photobucket.com_albums_l128_firefighter_2000_Rumbler_100_2357.jpg ai95.photobucket.com_albums_l128_firefighter_2000_Rumbler_100_2357.jpg](https://elightbars.org/forums/data/attachments/120/120340-dfd9b46c0bed64ab943c756017f1c5d7.jpg)
![ai95.photobucket.com_albums_l128_firefighter_2000_Rumbler_100_2356.jpg ai95.photobucket.com_albums_l128_firefighter_2000_Rumbler_100_2356.jpg](https://elightbars.org/forums/data/attachments/120/120341-c098655ea9f2e5e30280d4280d9974ab.jpg)