Sound Decoders and Accessories

  • Complete instruction manuals can be downloaded at no charge from the SoundTraxx™ website.
  • Sound samples are also available from the website
  • Autodetection of analog or DCC power source
  • Hyperlight™ lighting effects on all Tsunami® Sound Decoders
  • New Hyperdrive2™ – Smooth and precise locomotive operation
  • Multiple Whistles / Airhorns / Bells
  • Pure 32-bit (Tsunami2) or 16-bit (Tsunami and Econami) digital sound with built in equalizer and sound mixer

MAP is Manufacturer’s Advertised Price. MAP is shown, call for our everyday low price.

This is what's left — sold at “Retirement Discount” pricing. February 22, 2022

Tsunami2™ Premium Digital Sound Decoders

A new level of realism that combines the best in digital sound with trailblazing and innovative operating features.

All Tsunami2™ models include a selection of the following:

  • 32-bit processor and a more powerful amp
  • Full 28 function support
  • Four special effects processors: Equalizer, Sound Mixer, Dynamic Digital Exhaust, and Reverb
  • 1 amp, 4 function outputs along with 20+ Hyperlighting effects and new Hyperdrive2™ motor control
  • Functioning locomotive and train brakes with adjustable braking rates
  • Standard, 3-point and user-loadable speed curves
  • Flex-Map function mapping easily maps any function to any key
  • Dynamic Digital Exhaust features for Steam, Diesel and Electric
  • Switching Mode – reduces throttle by 50% and inactivates all momentum CV setting – allows the decoder to instantly respond to throttle changes.

Steam Features

  • 10 new or remastered exhaust chuffs featuring 2-cylinder, 3 cylinder and articulated settings on all exhaust chuffs
  • dynamic digital exhaust with drifting feature changes under load
  • Adjustable exhaust cutoff
  • Over 90 whistles, selectable compressors, bells, dynamos, couplers, and more
  • Blower, blowdown, water stop, rod clank and valve packing sounds
  • Function-activated cylinder cocks sound effect at any speed step
  • Drifting Mode: the exhaust volume will be reduced and side rod clank will play at an elevated level

Diesel Features

  • Diesel versions have up to 12 manufacturer specific prime movers
  • First ever Diesel Dynamic Digital Exhaust for a more authentic operating experience
  • Over 40 air horns, selectable compressors, bells, and couplers
  • Auto-manual RPM-notching mode
  • Engine Startup, Shutdown and Exhaust (through 8 notches)
  • Functioning dynamic brake with variable load sound and adjustable braking rate
  • Prototypically correct HEP modes and steam heat for authentic passenger train operations

Electric features

  • First ever Electric Dynamic Digital Exhaust with traction motor whine
  • Pantograph operation sounds plus catenary arcing sound and lighting effect
  • Over 40 airhorns/air whistle selections, selectable compressors, bells, and couplers
  • Pantograph extension/retraction – enable the interlock feature for more realistic operation
  • Trolley bell, stop requests, and door sounds for trolleys and traction models
  • Steam heat for authentic passenger train operation


1 amp / 4 function – 27mm x 10.5mm x 5mm – All models $103.96 (MAP price).

Part #Description
884001Steam – (discontinued 8/18)
885021EMD-2 Diesel – 567 12 Cylinder No Transition, 567C 16 Cylinder Non-Turbo, 645E 12 Cylinder Non-Turbo, 645 12 Cylinder Turbo, 645F 16 Cylinder Turbo, 645E 20 Cylinder Turbo, 710G 12 Cylinder, 710G 15 Cylinder
885002GE Diesels – FDL-12, FDL-16, 7FDL-16, Dual FDL-16, GEVO G12, 44-Ton Center Cab, GE Cummins
885003ALCO Diesels – 539 Turbo, 539 Non-Turbo, 244 Turbo, 251A i6, 251C V12, 251C V12 Super Charged, 251C V12, 251C V16, 251F V16 Super Charged
885004Baldwin & Other Diesels – Baldwin VO, 608NA, 608A, 606NA, RGS Galloping Goose, Dual Witcomb, Fairbanks-Morse
886001Electrics – AC Traction Motor


2 amp / 6 function – 35mm x 18mm x 6mm – All models $99.96 (MAP price).

  • Equipped with a 2-pin connector for the Current Keeper and the standard 9-pin flat JST connector (or many quick plug harnesses in popular models)
  • Customers who wish to replace their TSU-1000 decoders can simply unplug the decoder from the power harness and plug in the new TSU-2200 (talk about easy!)
Part #Description
884002Steam – (discontinued 8/18)
885006GE Diesel
885007ALCO Diesel
885008Baldwin & Other Diesel


4 amp / 6 function – 73.7mm x 16.8mm x 4.8mm – All models $143.96 (MAP price).

  • For O and Larger Scales
  • Universal type decoder with easy-to-use screw terminal blocks
Part #Description
885017EMD Diesel
885025EMD-2 Diesel
885018GE Diesel
885020Baldwin & Other Diesel


2 amp / 6 function – 73.7mm x 16.8mm x 4.8mm – All models $87.96 (MAP price).

  • Mounting provisions for many of the major diesel model manufacturers, such as Atlas, InterMountain and Bowser, into one board
  • Consolidates most of the original Tsunami Plug and Play-style boards (TSU-AT, BW, GN and IM) into a single design (these 4 part numbers consolidate over 30 old part numbers)

The TSU-PNP incorporates mounting provisions for many of the major diesel model manufacturers, such as Atlas, InterMountain and Bowser, into one board. This 6-function decoder measures 73.7mm x 16.8mm x 4.8mm and is expected to be a top-seller! This board is equipped with a 2-pin connector for the Current Keeper (P.N. 810140) and consolidates most of the original Tsunami Plug and Play-style boards (TSU-AT1000, TSU-BW1000, TSU-GN1000 and TSU-IM1000) into a single design! The following four part numbers consolidate over 30 part numbers!

Part #Description
885013EMD Diesel
885024EMD-2 Diesel
885014GE Diesel
885016Baldwin & Other Diesel


1 amp / 6 function – 35mm x 18mm x 6mm – All models $87.96 (MAP price).

  • Mates easily with motherboards in many of the DCC-ready models using this connector including Atlas, Bowser, Fox Valley and InterMountain
Part #Description
885009EMD Diesel
885023EMD-2 Diesel
885010GE Diesel
885011ALCO Diesel
885012Baldwin & Other Diesel

Tsunami™ Digital Sound Decoders

SoundTraxx has superseded its original Tsunami™ Digital Decoder line with its new Tsunami2™ Digital Decoder.

Tsunami™ TSU-1000 Digital Sound Decoders

1 amp/4 light outputs /multiple whistles / horns — no speaker included —
all units were $95.25, but now SALE-PRICED at $50.00!


827113Baldwin 608A (Turbo)
827115EMD 710 G3C-T2 (SD70ACe)
827124GE Dual FDL-16 (U Boats)

Tsunami™ TSU-750 Digital Sound Decoders

.75 amp / 2 light outputs / multiple whistles / horns — no speaker included —
all units were $111.98, but now SALE-PRICED at $63.00!


826005SP Cab Forward


827003EMD 710 (3rd Generation)

Tsunami™ TSU-GN1000 — for Athearn Genesis Style HO Diesels

1 amp / 4 lighting outputs / 1.5v lighting circuits / replaces light board —
all units were $79.98, but now SALE-PRICED at $50.00!

828053EMD 710 G3C-T2
828059GE GEVO12

Econami™ Digital Sound Decoder

Available in five formats to suit a variety of steam, diesel, and electric locomotives, Econami provides high-quality 16-bit sound, Hyperlight lighting effects, and Hyperdrive2 advanced motor control for enhanced realism. New features include Flex-Map technology, an easy-to-use method for assigning any function to any function key.

The Econami line includes SoundTraxx’ smallest sound decoder, the ECO-100, measuring just 27mm x 10.5mm x 5mm; the new ECO-200 2-amp "Universal" style as well as the ECO-400 4-amp version for models requiring a little more “beef.” The 21-pin ECO-21P mates nicely to any model with the NMRA-supported 21-pin socket while the new ECO-PNP is similar to the TSU-AT1000 in size.

All Econami™ models include a selection of the following:

  • Air compressors, airpumps, dynamos, couplers and brakes
  • Function-activated brake with synchronized sound effects
  • 40+ sound effects with a 7 band equalizer
  • Switching Mode – reduces throttle by 50% and inactivates all momentum CV setting – allows the decoder to instantly respond to throttle changes.
  • Support for easy CurrentKeeper installation to prevent momentary power losses during operation

Discontinued ECO 400 Electric

SALE-PRICED at $80.00!

883005Discontinued ECO 400 Electric

Tsunami™ SoundCar Digital Sound Decoder

The 16-bit Tsunami SoundCar Digital Sound Decoder is the only DCC decoder to replicate railcar sounds, such as the clickety-clack, flange squeal, flat spots, generator, brake cylinders, and glad hand release. It also includes a selection of user-adjustable horns, bells and whistles for cab cars and cabooses. For even more realism, the decoder has four Hyperlight lighting outputs for interior and exterior lights.

SoundCar Sound Effects

  • Brake cylinders
  • Brake squeal
  • Clickety-clack: Adjustable for 2-, 4- and 6-axle cars
  • Coupler clank and pin drop
  • Coupler release with glad hand separation
  • Flange squeal
  • Flat spots
  • Emergency brake valve (“big hole”): Activated when the emergency stop button is pressed
  • Generators: User-adjustable for reefers and passenger cars
  • Hand brake tie down and untie
  • Multiple airhorns, air whistle and bells with adjustable ring rates for cab cars and cabooses
    • Airhorns: Wabco E2, Nathan K5LA and Hancock air whistle
    • Bells: Cast, electronic and gong
  • Retainer bleed-off
  • Livestock sounds

More details and video at

ItemDescriptionMap Price
829100SoundCar Single Pack47.96
810141IC Wand7.16

Programming Track Booster

(Not required with ZIMO or LENZ LZV 100 systems.)

829002PTB-100 – Programming Track Booster52.76

SoundTraxx Speakers


Part #L x W or Diameter x DepthCRS Price
8101531″ (28mm) – 2 watt  (replaces 810054)9.56
8101141.2″ 9.56


Part #L x W or Diameter x DepthCRS Price
810078Oval  1.1 x 1.57”11.96
810103Oval  0.78 x 1.56”11.96
810112Oval  0.56 x 1.00”11.96
810113Oval  0.63 x 1.38”11.96
810115Oval  0.78 x 1.38″ 11.96

Mega Bass Speakers

Part #L x W or Diameter x DepthCRS Price
810129Mega Bass Spkr  – 0.91″ sq x 0.40″ d9.56
810130Mega Bass Spkr  – 1.06″ dia x 0.56″ d9.56
810131Mega Bass Spkr  – 1.10″ sq x 0.44″ d9.56

Enclosures & Gaskets

Part #DescriptionCRS Price
810108Spkr Enclosures .500”4.76
810109Spkr Enclosures .750”4.76
810110Spkr Enclosures 1.00”4.76
810118Gasket – .75″ (#053 spkr)4.76
810119Gasket – 1.0″ (#054 spkr)4.76
810120Gasket – 20x40mm (#103 spkr)4.76
810121Gasket – 14x25mm (#112 spkr)4.76
810138Gasket – 16x35mm (#113 spkr)4.76
810139Gasket – 28x40mm (#078 spkr)4.76

SoundTraxx Installation Parts

ItemDescriptionCRS Price
8100122 pin Microconnector7.16
810038Exhaust Cam Set8.00
810058Package / 10 Micro-Mini Connectors (single)8.80
810068TSU Spkr Harness – stm (3 wire JST spkr+cam)4.40
810069TSU Pwr Harness – stm+dsl (9 wire pwr)8.00
810091TSU Diesel Spkr Harness  (2 wire )4.40
810128TSU “Keep Alive” Capacitor (220mF)0.76
810132DBX-9000 Loco-Tender wiring kit (9 pin)14.36
8101359-Pin JST to NMRA 8-Pin Wiring Harness8.76
810156ECO-100/TSU-1100 8-Pin Power Harness (new)7.96
810157Econami/Tsunami2 4-Pin Speaker Harness (new)7.16
810158CurrentKeeper 2-Pin Harness6.36
810137Caboose Lighting KitSale

Crusader Rail Services
5920 Houghton St., Philadelphia, PA 19128
Phone: 215•482•7530
Last Update: April 7, 2022