Athearn HO Sound Ready Underframe, SD40/45 Features
- Streamlined DCC speed curves
- Lower motor current draw
- Quieter motor operation for DCC Sound
- Earlier models that don't have the Sound Ready starburst on the box will require this underframe in order to use the Genesis Motor Retrofit Kit (ATHG63839) available separately.
- Simple Installation
- Includes all weights
- Included mounting screws
- Integrated speaker box