SoundTraxx has been designing and manufacturing the latest in state-of-the-art sound systems for railway modellers since 1990.  Their latest products are the Tsunami ranges but purchasers should note that the sound files are not user updateable. 

TSU-1000 for HO gauge.

TSU-AT, GN & KT board replacements for HO

TSU-750 for N and some HO

All the Tsunami range have these common features:

  • Long and short addressing
  • Supports 14, 28, and 128 speed step modes
  • Speed interpolation provides smooth 128 speed step response in any mode
  • Programmable acceleration, deceleration & start voltage
  • Stadard and advanced consisting
  • 15 pre-programmed speed tables and 1 user programmable speed table
  • High Frequency Silent Motor Drive
  • Load Compensation
  • Supports 14, 28, and 128 speed step modes


    The Tsunami TSU-1000 is SoundTraxx’s high-performance, onboard locomotive sound system. The TSU-1000 is a versatile 1 amp decoder integrating a full-featured sound system, four Hyperlight lighting effects, a motor controller and a DCC decoder into a single, integrated package and is compatible with the NMRA DCC standards and Recommended Practices. 


    Dimensions 1.68" x 0.68" x 0.25".
    Maximum Current: 1 Amp Drive and Stall.
    Functions Outputs: 4 @ 100mA max.
    16 Bit Sound Processor.
    Output: 1 Watt @ 8 Ohms

    TSUnami P&P

    Tsunami AT1000

     Soundtraxx produce 3 forms of board replacement decoder.  They are board replacements for Atlas (AT), Athearn Genesis (GN) and Kato (KT) HO diesels.

    Other than the physical format the specification of these decoders is the same as the TSU 1000.


    The TSU-750, Micro Tsunami, is the little brother of the series.  The sound capabilities are the same as the TSU-1000 but it is less powerful as a loco decoder.   The maximum stall current is lower than most decoders and special care must be taken to check the loco's current usage.


    Micro Tsunami
    Dimensions:1.00" x 0.6" x 0.22".
    Maximum Current: 0.75 Amps Stall and Drive
    Function Outputs: 2 @ 100mA
    16 Bit Sound Processor.
    Output: 1 Watt @ 8 Ohms.

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