With its six axles providing a smoother ride, the EMD SD9 proved popular with a variety of railroads. Manufactured in the late ‘50s, some are still running today on tourist lines. Bachmann’s model comes with the Econami™SoundTraxx® DCC sound decoder. Factory set for EMD SD9 realism, the diesel package 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.