Diesel EMD F3A Powered w/QUANTUM Sound & DCC. DC / DCC and SOUND. DCC with QUANTUM SOUND. Factory Installed DCC Powered. Working Mars Light as Appropriate – Works on DC or DCC. Sound features include: Diesel Engine, Horn, Bell, Squealing Brakes, Doppler Effect, Air Let Off (in neutral), Headlight, and Trailer which mutes whistle and bell for double heading.