With its six axles providing a smoother ride, the EMD SD9 proved popular with a variety of railroads. Bachmann's model comes with the Econami SoundTraxx DCC sound decoder. Factory set for EMD SD9 realism, the diesel assortment also offers a choice of 5 prime movers, 16 airhorns, multiple variations of 7 bell types, 2 air compressors, and 3 couplers plus a function-activated grade-crossing signal-all in 16-bit polyphonic sound. Econami includes adjustable auto-notching sensitivity for prototypical operation, adjustable master volume and individual sound effect volume levels, advanced consisting, and more. FeaturesDCC sound-equipped with Econami decoderDual-mode NMRA-compliant decoderDirectional dimming headlightsPrecision motorDie-cast frameFine-scale handrailsE-Z Mate Mark II couplers, front and rearRecommended for Ages 14 and UpSpecificationsTrain Name: Rio GrandeTrain Number: 5307Gauge: N Scale