[Dan Pierce]

The generic LGB tender with sound which is a direct plug and play for that set is 69232.
I have this set and added the LGB 69232 but I swapped the tops as I did not like the decals that came with the 69232, the painted logo on the original tende looked much better.
I sold the non sound unit on the BAY.
All of these sets had tenders with frames built to accept the LGB speaker.
Since the tender you have has track power on the rear socket, any sound system can be easily added.

 

[Dan Pierce]

To make the power pick-up better, I installed a power pickup on the rear tender truck.
Big difference on plastic frogs and crossovers.