I hate to even ask these questions as they are probably very elementry, however here goes. I bought a USA GP-9 that is probably about 12 years old and only run for less than 1 hour. The manual says its sound ready. I want to add sound to the engine. I have a traditional powered track, single loop, no DCC. The litature included in the box shows sound available from USA to fit the GP-9. I went to USA web site and I dont see this available. Does this sound just plug in or would this have to be soldered in? Would there be other sound that would fit this engine. Any other things that you think I should keep in mind would be great. Thanks for your help and ideas.
Foamer01
Foamer01