[RCP57]

I think you would need a pretty massive trailer to haul them too because if I remember right they are 44lbs a piece.lol

I can't say how loud my HD is with the two small speakers compared to Mario's larger single but you can tell in the videos that his has a deeper tone. Mine are pointed at the ground also so when you are on concrete it is much louder than on soft dirt. If I ever get a sound unit for my small KW it will be interesting to see how that works since the speakers are mounted in the rad shell pointing forward with shutters that open and close.