ESU 58429 LokSound 5 DCC decoder
DCCSound Premium speaker for the 421 class
1) Splay the lower edge of the body outward from the chassis and the body will life off of the chassis.
2) Remove the 21 pin DC plug and speaker enclosure from the model.
3) Insert the 21 pin decoder and DCCSound speaker. The speaker is fixed to the chassis via two screws.
4) Refit the body once the decoder has been tested.