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This 1-amp Digital Sound Decoder simply plugs into models equipped with an NEM-supported 21-pin socket.

The ECO-21PNEM can be wired to a CurrentKeeper (P.N. 810140) to maintain performance over dirty track and switches.

Learn More about Tsunami2 Features

Product Specifications

Dimensions: 30.5 x 15.5 x 6.55mm 
Max. Motor Stall Current: 1A
Max. Function Current: 100mA (each output)
Function Outputs: 6
Audio Amplifier: 2 Watt, 8-Ohm Load
DCC Track Voltage: 7.5V – 22V
Sound Channels: 12

Compatible Speakers


28mm (1") Round Speaker


40 x 28.5mm Oval Speaker


35 x 16mm Oval Speaker


35 x 20mm Oval Speaker


15 x 12 x 11.5mm Mini Cube Speaker


Note: The Mini Cube Speaker, can be used when wired in series with another Mini Cube Speaker.


Mega Bass Speakers


Sound Samples

Steam Sound Sample


Econami Steam Exhaust Chuffs:

Econami Steam Whistles:

Diesel Sound Samples


Econami Diesel Prime Movers:

Econami Diesel Airhorns: