I have a 'high boiler' version of the above Spectrum engine, and I assume the Soundtraxx DSD-150 and a speaker will be needed to put a sound decoder in this guy. It appears that there is no special decoder like with the 2-8-0 and 2-10-0. I looked at the 2-8-0 decoder, but the tender on the 4-6-0 is very short(undec/painted version).
Jim Bernier