1) Remove coupler assemblies, body mount screws and gently remove the body assembly from the chassis.
2) Plug the 21 pin decoder in place, noting the decoder is plugged in upside down, and locate the speaker in the long hood end.
A premium sugarcube speaker from DCCSound is fitted in the available space. This speaker is specifically designed for the Auscision 48 / 830 class model.
3) Refit the body, mounting screws and couplers.