Transporting people or machines is just as important as the work being done on a job site. Sound Heavy Machinery understands this and offers quality new and used trailers and vehicles.  A full listing of pre-owned trucks and machines can be found here. Many times you need something special. For new specialized situations, we offer XL Specialized Trailers. XL Specialized Trailers is a leading designer and manufacturer of highly engineered and customized trailers for applications in the heavy haul trucking, construction, agriculture, wind energy, and oil & gas industries.