I have a web article about making a dcc soundbox at:

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Harold

Hmm, I may do that with my Soundbug, since I have no intention of actually installing it in a loco.

--Randy

Hmmm..... Interesting. This begs a question though, since my HO modeling is diesel, and my steam is mostly On30. Could you put more than one sound decoder in the box, say, in my case, a EMD turbo 645, a non turbo 567, a GE FDL and a Alco 539T and have one or a combination of them going at once for differing sounds on the same speakers? Or, would I need to build a different sound box for each type of decoder (in my case 4 boxes?)

On the Model Railroader forums someone posted their version of this which has SIX decoders installed in the box, feeding a serious amp with seperate subwoofer.

--Randy