Atlas U23B

After several different setups, Bruce has finally settled on this as the quickest, best sounding install for these popular locos.


The speaker enclosure is created through the shell of the locomotive. The speaker is glued to the rear weight and supported in the very back with a piece of styrene. The positive pressure (sound waves coming off the cone of the speaker) get routed out the rear truck area. The negative pressure (sound waves coming off the magnet side of the speaker) get routed above the decoder and out the front truck area.

The decoder board installs in place of the Atlas light board. A diesel Tsunami could be located in the same place as the 820043 shown here. With the release of the QSI Revolution A and Tsunami Atlas Light board version decoders, they would be preferred over the DSD-AT100-LC, which has now been discontinued.


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