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Soundtraxx 885823 TSU-21P NEM 8 Function Tsunami 2 DCC Sound Decoder - EMD-2 Diesel

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MSRP: $122.95
Price: $98.36
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[ 7 ] pcs In Stock
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Item Number: 885823
Manufacturer: SoundTraxx
Manufacturer Part No: 885823
Soundtraxx 885823 TSU-21P NEM 8 Function Tsunami 2 DCC Sound Decoder - EMD-2 Diesel

**This decoder does NOT include a speaker. Please visit the Speaker Aisle to find the size and shape that will fit your installation best.
**Be sure to read about Tsunami 2 Speaker Selection here.

We here at SoundTraxx are very excited to be able to offer a new decoder board to the Tsunami2 family! We are welcoming the TSU-21PNEM8, , an 8-Function 21-pin NEM-compatible plug-in board design! Adding the 2 lights has been requested by many modelers, so we added these to the TSU-21PNEM8 decoder. 

The TSU-21PNEM8 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.

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!

The new EMD 'Dash 2' (EMD-2) Tsunami2 Digital Sound Decoder provides 8 new prime mover selections. This decoder is available in all Tsunami2 board formats and gives your customers a jaw-dropping 42.4 Million sound combinations to choose from. This is an additional decoder to the Tsunami2 line and will not replace the current Tsunami2 EMD Digital Sound Decoder. 

SoundTraxx is pleased to announce Tsunami2, a new line of Digital Sound Decoders that combines the best in digital sound with trail blazing and innovative operating features. 

Tsunami2 sets a new standard for premium sound decoders, with the emphasis on FUN!  More sounds, more features, more ways to run your trains like a real engineer.  Your model railroading experience will leap to a whole new level of realism!  Expansive memory means that each decoder is packed with multiple prototypes and accompanying sound effects.   No computer dongles or downloading is required – sounds are changed instantly by way of simple CV programming using your command station.  The new incredibly small TSU-1100 provides waves of pure digital sound that will delight your senses, with effects so amazing you won't believe your ears.  Tsunami2 sound features are matched only by its superior motor control and brilliant lighting effects, making it unsurpassed in its technological capabilities.  Tsunami2 leads the industry in processing power, with a 32-bit processor that provides the necessary horsepower needed to support 28 functions, 16 polyphonic sound channels, tons of sound and lighting effects, advanced motor control and yet - measures just 27mm x 10.5mm x 5mm!
Brand New Features to Enhance the Modeler’s Experience:
  • New and remastered horns, whistles, bells and more in a single decoder
  • Functioning adjustable steam exhaust cutoff
  • Functioning locomotive and train brakes with separate adjustable braking rates
  • Fuel loading and servicing operations with Fireman Fred or Fireman Ed
  • Locomotive servicing sounds
  • Authentic steam drifting sounds
  • Prototypically correct diesel HEP modes and steam heat for authentic passenger train operations
  • Authentic cab chatter (recorded from real train operations)

Soundtraxx Tsunami2 Decoders offer the following features:

The TSU-21P NEM is a 1 Amp, 6-function decoder compatible with the 21-pin NEM connector commonly used in Europe.  This mates easily with the motherboard in many of today’s DCC-ready models that use this connector, including such manufacturers as Atlas, Bowser, Fox Valley and InterMountain. 

Tsunami2 Steam decoders can produce over 50 sound effects! The impressive built-in sound library includes 12 bells, over 60 whistles, 10 air pumps, 8 dynamos, 10 exhaust chuffs, snifter
valve, injectors, Johnson Bar, power reverse, firebox blower, side rod clank, brake squeal, and more.  The adjustable steam cutoff is guaranteed to make you feel like you are in the cab and in control! Drop into Drift Mode and listen to the rod clank and valve packing effects.  Fireman Fred has a few new things up his sleeve as well, as he works to keep the locomotive in prime operating condition.  Selectable fuel loading makes models sound as they should, from hand-shoveled steam engines, to oil-burners to those equipped with augers, to wood being stacked.

Tsunami2 Diesel decoder's 50+ sound effects and expansive sound library includes engine startup and shutdown, engine prime mover through all eight notches, straight-to-8, HEP mode, 13 bells, over 40 airhorns, 4 air compressors, dynamic brakes, radiator fans, brake squeal and more. Our new reactive DDE automatically adjusts the speed, timbre and volume of the exhaust as your engine works harder.

Tsunami2 goes several steps beyond ordinary sound generators. Whether steam, diesel or electric, Tsunami2 is so powerful that it comes with four special eff ects processors - the Equalizer, Sound Mixer, Dynamic Digital Exhaust and Reverb. It's like having a complete sound studio at your fingertips! Each and every sound can be independently set for the volume that suits your ear.

Hyperdrive2™ technology results in smooth and precise locomotive operation, even at super-slow speeds.  Our switching mode will add a new level of realism for those whose primary 'fun' is in the running!

Common Decoder Features Include:
  • Powerful 32-bit processor capable of 16 simultaneous sound channels
  • Adjustable reverb and equalizer for the most realistic sound optimization ever!
  • Train line charging effect
  • More powerful amplifier for increased volume range
  • Hyperdrive2 motor control
  • Functioning locomotive and train brakes with adjustable braking rates
  • 20+ Hyperlight lighting effects
  • 4 function outputs
  • Standard, 3-point and user-loadable speed curves
  • Flex-Map function mapping easily maps any functi on to any key
  • Compatible with NMRA DCC Standards & RPs

Diesel Features:
  • Each diesel version (EMD, GE, etc.) contains up to 9 manufacturer specific prime movers (Turbo, Non-turbo, etc.)
  • First ever Diesel Dynamic Digital Exhaust (DDE) for a more authentic operati ng experience
  • Startup, shutdown and exhaust through 8 notches
  • Automatic or manual notching
  • Functioning dynamic brake with variable load sound and adjustable braking rate
  • Over 40 air horns
  • Selectable compressors, bells, and couplers
  • First ever Fireman Ed is ready to work on the locomotive, with general service, cab sounds and more!
  • Clickety-clack, fueling, and authentic cab chatt er add realism
  • Prototypically correct HEP modes and steam heat for authentic passenger train operations

Steam Features:
  • Ten new or remastered exhaust chuffs in a single decoder
  • Dynamic Digital Exhaust with drifting feature changes under load
  • Rod clank and valve packing sounds
  • Adjustable exhaust cutoff
  • Over 60 whistles
  • Selectable compressors, bells, dynamos, couplers, and more
  • Fireman Fred sounds for coal-fired, wood, oil, or auger fueled locomotives
  • Locomotive servicing sounds
  • 2-cylinder and articulated settings plus new 3-cylinder exhaust chuffs
  • Cylinder cocks, blowdown and wheelslip effects

Electric Features:
  • First ever Electric DDE with traction motor whine
  • Pantograph operation sounds
  • Over 40 airhorns/air whistle selections
  • Motorman Omura provides cab sounds, operates doors and services the engine
  • Catenary arcing sound and lighting eff ect
  • Selectable compressors, bells, and couplers
  • Clickety-clack and authentic cab chatt er add realism
  • Trolley bell, stop requests, and door sounds for trolleys and tracti on models
  • Steam heat for authentic passenger train operation

Decoder Specifications: 
  • Preloaded Sound Files with Multiple Bells and Horns
  • Size: 1.201 x 0.610 x 0.256 Inch (30.5 x 15.5 x 6.5mm)
  • Connection: NEM660 21MTC
  • Motor Rating: 1.00 Amp Max
  • Functions: (6) 100mA outputs (500mA Total)
  • BEMF: Yes
  • Sound: Polyphonic 16-Bit Processor, 7-Band Equalizer, Reverb
  • Speaker Rating: Speaker Not Included - Requires Speakers Rated at 2.0W, 8 ohm
  • Capacitor:  2-Pin JST CurrentKeeper connection
  • Protocol: NMRA DCC Compliant (Multi-Protocol Options Available)
  • Transponding: Digitrax Compatible
  • Additional Features: Digital Sound Sync, Fwd and Rev Trim Adjustment

Sound Selections for Tsunami2 for EMD-2 Diesel Prototypes:

Air Compressors

Engine Driven
GE "Whooping" (motor driven)
GE "GEVO" Series (motor driven)
EMD Shaft Driven


Nathan K3LA
Nathan K3HA
Nathan K3L
Nathan K5HL
Nathan K5LA (1)
Nathan K5LA (2)
Nathan K5LA (3)
Nathan K5LH
Nathan K5LLA
Nathan M3
Nathan M5 
Nathan P3
Nathan P5 Early
Nathan P5 Late
Nathan P5A
Nathan P5A 3rd Generation
Holden M3H
Holden K5H
Leslie A125
Leslie A125/200 Combo
Leslie A125-3E
Leslie A200
Leslie A200/S3L Combo
Leslie RS3L
Leslie RS5T
Leslie S2M
Leslie S2M/A200 Combo
Leslie S2M/S3L Combo
Leslie S3L
Leslie S5T
Leslie S5T/A200 Combo
Wabco A2
Wabco AA2
Wabco E2 (1)
Wabco E2 (2)
Wabco B Series 2-Chime
Wabco 10" Air Whistle
Hancock 4700 Air Whistle
Rio Grande Southern Galloping Goose
"Aoogah" Klaxon Horn
Rail Car Horn
Canadian Centennial Horn ("Oh Canada")
Leslie S3LR
Leslie RS3K


ALCO (1)
ALCO (2)
ALCO (3)
EMD (1)
EMD (2)
EMD (3)
EMD (4)
Fairbanks-Morse (Brass)
Graham White Electronic Bell
Western Cullen Hayes Gong Bell
Rio Grande Southern Galloping Goose
Canadian Brass Bell
Prime Electronic Bell

Prime Movers

EMD 567 12 Cylinder No Transition
EMD 567C 16 Cylinder Non-Turbo
EMD 645E 12 Cylinder Non-Turbo 
EMD 645E 12 Cylinder Turbo
EMD 645F 16 Cylinder Turbo
EMD 645E 20 Cylinder Turbo
EMD 710G 12 Cylinder
EMD 710G 16 Cylinder

Manufacturers Website: Soundtraxx

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