I don't know alot about electronics would it be hard to install sound in a basic athearn loco say a P42 running on dc? I know there might be some triming to fit speakers can it be done? rambo1...
Here is a how to do it. http://www.soundtraxx.com/documents/appnotes/ath_rtramd103_p42.pdf
First of all, does the locomotive run well on DC? If not, converting to DCC will likely result in an engine that runs even worse. But, if it's a good runner, then DCC is a good option.
How quiet is the engine? One problem, particularly with older BB engines, is that their internal motor and gear noises compete with a DCC sound system and make it less attractive.
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