There were two variants of these models produced by Austrains over the years:
1) Plastic chassis, not DCC ready
2) Metal chassis, with provision for DCC
Non-DCC ready plastic chassis
In the image below, 8040 has been fitted with twin sugarcube speakers, specifically designed for this chassis, an ESU 58823 LokSound 5 DCC Micro decoder and ESU Power Pack mini stay-alive unit. The globes were replaced with LED headlights front and rear, connected via 470 ohm resistors back to the decoder.
DCC ready metal chassis
A DCCSound premium twin sugarcube driver speaker was fitted inside the cab, providing more than ample sound.
An ESU 58420 LokSound 5 DCC decoder was then hardwired to the model and speaker. LED headlights were incorporated into the model too.