A true pioneer in the model train industry, SoundTraxx has been creating innovative products for the discriminating model railroader since 1990. We proudly design and manufacture our industry-best products right here in the USA, and our friendly customer support staff work side-by-side with the rest of our product team.

The Tsunami2 TSU-PNP8
The TSU-PNP8 is a universal factory board replacement sound decoder suitable for use in many manufacturer’s diesel models such as those made by Atlas, Athearn, and InterMountain Models. It is suitable for a wide variety of models from HO to S scale.

This decoder includes a connector to easily add a CurrentKeeper (P.N. 810140 or 810160) to maintain performance over dirty track and switches.

Need Help Choosing a Sound Profile?
We have tons of sounds to match a wide range of locomotives. So many, in fact, we cannot fit them all on one decoder. Therefore, they are broken up into sound profiles of like sounds (Steam, EMD, GE, Electric, etc.). If you don't know which sound profile you need, the best place to start is the Sound Selection References. These will list all the prime movers or exhaust chuffs available on each sound profile. If you need further assistance explore these links:

Decoder Selector: Tells you which board format and part number you need for specific models.
Sound Samples: Hear our sounds in action!
Choosing the Right Sound System: If you are new to SoundTraxx, model railroading, or are unfamiliar with our products.
Sound Selection References: There are several for each decoder and they can be found below or in the Manuals section of our website.

DYNAMIC DIGITAL EXHAUST
For added realism, you’ll love our reactive Dynamic Digital Exhaust (DDE) feature. When your locomotive is traveling across flat terrain and simply maintaining speed, you will hear your locomotive chugging along. But, when the locomotive encounters a grade and the engineer applies more throttle to get the train up the hill, the engine sounds will automatically react and reflect the increase of power needed to crest the hill. DDE accomplishes this by calculating the changes in strain or load on the motor and adjusting the exhaust to appropriately simulate the work the engineer would be doing to the throttle of the engine. This gives Tsunami2 the ability to create the most realistic experience possible.

HIGH QUALITY SOUND LIBRARY
Our large selection of high quality sound effects include:

Up to 12 Prime Movers in each sound profile
Up to 12 Bells
40+ Airhorns
Additional couplers, cab chatter and more!

ADDED REALISM
Additional You will feel like you are in the cab with the amazing new features that Tsunami2 has to offer including: Reactive Dynamic Digital Exhaust, Functioning locomotive brakes, and train brakes. We also offer a large selection of selectable sound effects including: prime movers (up to 12), bells (12), airhorns (40+) and more!

EASY INSTALLATION
This decoder includes a connector to easily add a CurrentKeeper (P.N. 810140 or 810160) to maintain performance over dirty track and switches.
Dimensions: 74 x 17 x 5mm
Max. Motor Stall Current: 2A
Max. Function Current: 100mA (each output)
Function Outputs: 8
Audio Amplifier: 2 Watt, 8-Ohm Load
DCC Track Voltage: 7V – 22V
Sound Channels: 16