I recently purcahsed a used large scale 81180 Pardee & Curtin Lumber Climax locomotive.
I want to add a Phoenix p 11 sound systen with a 2 1/2" oval speaker. ( seems to have room for it )
I noticed that the newer models come with a fan unit for cooling, when loaded with a sound unit. Will this be an issue for me?

Is is possible to add a sound unit to a 1/20 large scale Narrow Gauge Rail Truck that is  running on  standard DC track power. ( Not DCC ).
If so, what would be the product to use?

Sincerely,

F. John