The sound quality is pretty good. As good as Railsounds, but it has more of a selection, like couplers, etc., as well as having steam and deisel sounds all in one. It also has twice as many speakers which are larger, more robust. No need to buy anything else. The sound can be adjusted and the whistle/horn has a sliding switch to feather the sound out. Sound on sound capability as well. 2 speakers are included, as well as an amp if not mistaken.
I’m sure adding more speakers wouldn’t be too difficult. I’m no electrical genius, Don. Not by a long shot, so please ask someone else about that.
MRC also makes city/country sound stations that have a lot of associated sound effects pertaining to each environment.
Jim