Gentlemen both your suggestions seem to fit together, though hard wire is what I expected. The biggest challenge is finding room for the speaker. To both of you; Thanks for your thoughts.
You can buy an 8-pin or 9-pin connector with wires installed and solder those wires to the wires on the decoder. I did that to the Soundtraxx that I put in my Spectrum K4.
Modeling the Pennsy and loving it!
In our shop, Tsunami is the favored sound decoder. It will be a hard wire install as there is no plug and play int that product line.Go to the Soundtraxx web site and look up their products appropriate for your loco. I would remove the Bachmann unit completely and use the Tsunami for sound and control.
I have recently gotten a Bachmann Spectrum 70 ton three truck Climax. It has DCC on board (lights & direction), I want to add sound. Hopefully someone on this forum has some experience that would save trying to invent the wheel again. Product suggestions or techniques would be most appreciated.