The first video is of my CAT dump truck. The SM7 sound system is pretty sweet. Its a little better than the SMX.
https://www.youtube.com/watch?v=-7eocDVjOEQ
The second video is of a Dromida Wasteland 4x4 1/18 buggy. We just had to have some fun on the Ice from Winter Storm Jupiter...
https://www.youtube.com/watch?v=aLUyWhYEOxA