The SoundTraxx 885025 is a TSU-4400 Tsunami2 digital sound decoder with the EMD-2 sound set. Tsunami2 combines a 16-bit sound system, Hyperdrive2 motor control, Hyperlight lighting effects and a full NMRA-compliant DCC decoder on one board, driven by a 32-bit processor with 16 polyphonic sound channels.
This version is the big-scale decoder: a 4-amp motor rating and screw terminals instead of solder joints, rated 4A and suited to some S, O and Large Scale locomotives. Dynamic Digital Exhaust reads the load on the motor and notches the engine up and down on its own, so the locomotive sounds like it is working for its train.
Features
8 EMD-2 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
Over 40 air horns and 13 bells, plus air compressors, couplers and dynamos
Dynamic Digital Exhaust (DDE) matches exhaust volume and RPM to the load on the motor automatically
Three braking types: independent, train and dynamic braking
Hyperdrive2 motor control for smooth, creep-speed switching
Over 20 Hyperlight lighting effects across 6 function outputs
16 polyphonic sound channels on a 32-bit processor, with a 7-band equalizer and adjustable reverb
CurrentKeeper ready — works with the SoundTraxx 810140 CurrentKeeper
More Information
Item Number:
SoundTraxx 885025
Model:
TSU-4400 Tsunami2
Sound Set:
EMD-2 Diesel
Scale:
some S, O and Large Scale locomotives
Decoder Size:
69 x 30.5 x 14mm
Connection:
Universal-style with screw terminal blocks (no soldering)
Max. Motor Stall Current:
4A
Function Outputs:
6
Audio Amplifier:
3 Watt, 8-Ohm Load
DCC Track Voltage:
7V – 27V
Sound Channels:
16 polyphonic
Processor:
32-bit, 28 functions
Shop the full SoundTraxx range, compare every DCC decoder we stock, or see the other EMD-2 sound profile decoders. A speaker is not included — browse DCC speakers rated 3 watt or better, and find install parts in DCC wiring. Add a SoundTraxx 810140 CurrentKeeper to keep sound alive over dirty track and turnouts.
FAQ
Will this fit my locomotive?It measures 69 x 30.5 x 14mm and connects by universal-style with screw terminal blocks (no soldering). Check that against the space in your shell before ordering — other Tsunami2 versions use different connectors and sizes.
Is a speaker included?No. Pair it with an 8-ohm speaker rated 3 watt or better that fits your shell.
Which prime movers do I get?All 8 listed above, selectable via CV 123. You are not locked to one engine sound — pick whichever matches your prototype.
EMD-2 or plain EMD — which do I want?This is the EMD-2 set: less-common EMD prime movers, named by cylinder count. The plain EMD set covers the more common 567/645/710 variants.
Does it run on DC?Yes. Tsunami2 runs on a standard DC power pack as well as DCC, though sound and lighting options are limited on DC. Full function control needs a DCC system.
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