This speaker configuration is for Life-Like Proto 1000 RS2 locomotives. A UFIT-0735 and fit in the long-hood end and a UFIT-0730 can fit the shoot-hood end. In both cases, I use thin mounting-tape to stick the speaker(s) to the chassis. The stock PCB and headlights will need to be removed. Use pre-wired 1206 LEDs (or similar) glued to the backside of each headlight lens. No other modifications are required.
 
A LokSound 58821 or 58921 Direct can be used. I have not confirmed this but i believe a Soundtraxx TSU-PNP or ECO-PNP will also work. There is not enough vertical height to use a 21pin motherboard.
 
The speakers come preassembled and tested.