I Got my hands on a Bachman 38 ton shay (later remake of the 36 ton) ... installing ESU Loksound 5XL. I need a speaker , it will be operated outdoor so I like something a bit beefy ... the tender seems to have ample space .... what do you  recommend ? thanks

Hi, You could go to Amazon and search for "hobby speaker" lots of offerings there.

Loco Bill

Look at Visaton speakers... parts-express.com has them.

Lots of options with good bass in a small speaker, also there are weatherproof options.

https://www.parts-express.com/speaker-components/hi-fi-woofers-subwoofers-midranges-tweeters/mini-speakers/brand/Visaton

find the size you need, and then select the one with the best bass... fit the largest you can get obviously

I have a bachman one i could sell you but i thick you are better off with Greg's suggestion. i have replaced all my speakers with Phoenix, but they are no longer available.

Al P.