ESU 58429 LokSound 5 DCC 21-MTC decoder
DCCSound premium speaker for SDS 800 class
To remove the body from the chassis, first the couplers must be removed.
The body then lifts off from the chassis.
Two screws holding the motherboard to the chassis are removed and the motherboard lifted up by a few millimetres from the chassis.
The speaker wires are soldered to the speaker then the speaker is fitted between the motherboard and chassis, with the decoder plugged in. The speaker driver (silver component) faces down in the model.
The body and couplers are then refitted.
The image below shows the aftermarket speaker fitted, along with the original factory speaker next to the model.