Norway2112, you asked so here it goes....................
Car as I originally built it with DSX sound decoder and obviously a large diameter speaker, it ran well but I put the decoder in an auto rack. The car came from Alan Curtis, nice kit.
I was in TorC New Mexico last spring and found the sub in a little curio shop. It is/was a pencil sharpener. I couldn't resist as I thought it would make a close to scale sub of some type. Just different, you know. BTW, the car tracks and runs very well, even with all six of the pivot points
I must have a thing for subs. Here is another Alan Curtis car with DIY explorer sub. I can hear The Beatles now.......
Thanks for asking and looking.
Carl