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The SoundTraxx 810090 is the 50 x 90mm Oval Speaker. This is one of our largest speakers for use with the TSU-4400 in O-scale or larger models. Specifications Item Number: SoundTraxx 810090 Dimensions: 50 x 90 x37.5mm(D) Frequency Response: 230Hz - 20kHz Power: 2 Watts (Nominal) 5 Watts (Peak) Impedance: 8 Ohms More Information Browse all DCC speakers and DCC wiring, shop the full SoundTraxx range, or pick a decoder from our DCC decoders.

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The SoundTraxx 885809 is a TSU-21PNEM8 Tsunami2 digital sound decoder with the EMD 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 21-pin MTC plug-in decoder, rated 1A and suited to HO scale and larger. 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 9 EMD prime movers: EMD 567 No Transition, EMD 567 Non-Turbo, EMD 567 Turbo, EMD Dual 567, EMD 645 Non-Turbo, EMD 645 Turbo, EMD Dual 645 Turbo, EMD 710 Turbo, EMD 710 G3C-T2 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 8 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 885809 Model: TSU-21PNEM8 Tsunami2 Sound Set: EMD Diesel Scale: HO scale and larger Decoder Size: 30.5 x 15.5 x 6.5mm Connection: 21-pin NEM (21MTC) plug Max. Motor Stall Current: 1A Function Outputs: 8 Audio Amplifier: 2 Watt, 8-Ohm Load DCC Track Voltage: 7V – 22V 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 / EMD-2 Diesel decoders. A speaker is not included — browse DCC speakers rated 2 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 30.5 x 15.5 x 6.5mm and connects by 21-pin nem (21mtc) plug. 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 2 watt or better that fits your shell. Which prime movers do I get?All 9 listed above, selectable via CV 123. You are not locked to one engine sound — pick whichever matches your prototype. EMD or EMD-2 — which do I want?This is the EMD set: the common 567, 645 and 710 prime movers. The separate EMD-2 set carries a second group of less-common variants called out by cylinder count. Match the list above to your prototype. 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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The SoundTraxx 885823 is a TSU-21PNEM8 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 21-pin MTC plug-in decoder, rated 1A and suited to HO scale and larger. 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 8 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 885823 Model: TSU-21PNEM8 Tsunami2 Sound Set: EMD-2 Diesel Scale: HO scale and larger Decoder Size: 30.5 x 15.5 x 6.5mm Connection: 21-pin NEM (21MTC) plug Max. Motor Stall Current: 1A Function Outputs: 8 Audio Amplifier: 2 Watt, 8-Ohm Load DCC Track Voltage: 7V – 22V 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 2 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 30.5 x 15.5 x 6.5mm and connects by 21-pin nem (21mtc) plug. 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 2 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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The SoundTraxx 851001 is the MC1Z102P6 DCC mobile decoder — a motor and lighting decoder without sound, for Z and N scale locomotives. It is rated 1 amp and connects by 6-pin nem651 plug. As an MC1 series decoder it operates on DCC only — it needs a command station and will not run on a plain DC power pack. Motor control is SoundTraxx Hyperdrive. Features DCC operation — requires a DCC command station 14 Hyperlight lighting effects across 2 function outputs — Mars Light, Pyle National Gyralite, single and dual strobes, Western-Cullen D312 rotary beacon, Prime Stratolite, Type I and II ditch lights with grade-crossing logic, dimmable headlight, Dyno-Light and FRED Rule 17 or directional lighting control, grade-crossing timers, adjustable flash rate and LED brightness correction Hyperdrive motor control for smooth low-speed running NMRA DCC compliant, made in Durango, Colorado More Information Item Number: SoundTraxx 851001 Model: MC1Z102P6 Type: Mobile decoder — motor and lighting, no sound Scale: Z and N scale Decoder Size: 13 x 9 x 3mm Connection: 6-pin NEM651 plug Max. Motor Stall Current: 1A Function Outputs: 2 (100mA each) Operating Modes: DCC only Max. Track Voltage: 22V Motor Control: Hyperdrive Shop the full SoundTraxx range, compare every DCC decoder we stock, or find install parts in DCC wiring. Want engine sound as well? Look at the sound decoders instead — this one is motor and lights only. FAQ Does this make engine sound?No. Mobile decoders drive the motor and lights only. For sound, choose a Tsunami2, Blunami or Econami sound decoder. Will it run on my DC power pack?No. This is an MC1 series decoder and is DCC only — it needs a command station. If you need DC too, choose an MC2 series decoder such as the 852002 or 852003. What does the model number mean?MC1Z102P6 breaks down as: MC1 series (DCC only), Z for Z and N scale, 1 amp, 02 function outputs, and the connector type. Will it fit my locomotive?It measures 13 x 9 x 3mm and connects by 6-pin nem651 plug. Check that against your locomotive before ordering — the other MC decoders use different connectors and sizes.

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The SoundTraxx 885813 is a TSU-PNP8 Tsunami2 digital sound decoder with the EMD 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 a drop-in replacement for the factory board in many HO diesels, rated 2A and suited to HO to S scale. 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 9 EMD prime movers: EMD 567 No Transition, EMD 567 Non-Turbo, EMD 567 Turbo, EMD Dual 567, EMD 645 Non-Turbo, EMD 645 Turbo, EMD Dual 645 Turbo, EMD 710 Turbo, EMD 710 G3C-T2 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 8 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 885813 Model: TSU-PNP8 Tsunami2 Sound Set: EMD Diesel Scale: HO to S scale Decoder Size: 74 x 17 x 5mm Connection: Drop-in factory board replacement Max. Motor Stall Current: 2A Function Outputs: 8 Audio Amplifier: 2 Watt, 8-Ohm Load DCC Track Voltage: 7V – 22V 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 / EMD-2 Diesel decoders. A speaker is not included — browse DCC speakers rated 2 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 74 x 17 x 5mm and connects by a drop-in factory board replacement. 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 2 watt or better that fits your shell. Which prime movers do I get?All 9 listed above, selectable via CV 123. You are not locked to one engine sound — pick whichever matches your prototype. EMD or EMD-2 — which do I want?This is the EMD set: the common 567, 645 and 710 prime movers. The separate EMD-2 set carries a second group of less-common variants called out by cylinder count. Match the list above to your prototype. 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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Introducing the More Compact CurrentKeeperII! Not all models are made the same, and some are a TIGHT fit for a decoder installation. The CurrentKeeper is now available in two sizes to fit more models and make your installs easier! Keep more of your trains running even over dirty track and switches!  The NEW SoundTraxx CurrentKeeperII™ is designed to add additional power capacity to any decoder installation. It can be used to overcome dirty track, limited electrical pickup or dead frogs to ensure reliable operation of any locomotive in your fleet. It measures 20.1 x 13.2 x 11mm. ● Maintains power to the decoder for up to 6 seconds during electrical interruptions● Compatible with NMRA DCC Standards & Recommended Practices More Information Browse all DCC speakers and DCC wiring, shop the full SoundTraxx range, or pick a decoder from our DCC decoders.

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The SoundTraxx 829100 is the Tsunami SoundCar — a 16-bit digital sound decoder built for rolling stock rather than locomotives. It has no motor drive at all; it exists to give your cabooses, passenger cars, reefers and stock cars their own sound and lighting. Because the sound comes from the train instead of the engine, you get running sound that moves down the consist: clickety-clack over the rail joints, flange squeal on curves, brake cylinders and coupler clank. SoundTraxx suggests roughly one SoundCar per third or fourth car rather than one in every car. Features 11 air horns and whistles: Nathan K5LA, K5LA Amtrak, K3L, K3LA and P3; Wabco AA2 and E2; Leslie S2B; Hancock air whistle; and two caboose whistles for shoving-platform work 5 bells: modern cast, bronze cast, cast, electronic and gong Clickety-clack configurable for 2-, 4- and 6-axle cars, plus flat spots, flange squeal and brake squeal Full brake system: independent and train brakes, brake cylinders, retainer bleed-off, train line charge, hand brake tie-down and untie, and an emergency “big hole” valve on E-stop Couplers: clank, pin drop and release with glad-hand separation Generators that behave correctly per car type — intermittent for a reefer, constant for a passenger car BeastBanter livestock: cattle or sheep, with a “spook the livestock” function for stock cars 4 lighting outputs with Hyperlight effects including FRED, firebox and stove flicker, and interior/exterior lighting CurrentKeeper ready — quick-plug socket for the SoundTraxx 810140 CurrentKeeper More Information Item Number: SoundTraxx 829100 Model: Tsunami SoundCar Built For: Rolling stock — cabooses, passenger cars, cab cars, reefers, stock cars Scale: N through G scale Decoder Size: 47 x 14 x 8.5mm Connection: Universal-style board with bare, NMRA colour-coded wires Motor Drive: None — this decoder does not drive a motor Current Draw: 15 – 25mA at 14V Function Outputs: 4 (100mA each) Audio Amplifier: 8-Ohm speaker required (not included) Sound Resolution: 16-bit Functions: F0 – F12 Shop the full SoundTraxx range, compare every DCC decoder we stock, browse DCC speakers, or find install parts in DCC wiring. Add a SoundTraxx 810140 CurrentKeeper to keep sound alive over dirty track. FAQ Does this go in a locomotive?No. The SoundCar has no motor drive — it is made for the cars behind the engine. Put a Tsunami2, Blunami or Econami in the locomotive and a SoundCar in the train. Do I need one in every car?No. SoundTraxx recommends about one per third or fourth car. The effect is a train that sounds alive along its length, not a row of identical speakers. Which cars is it for?All rolling stock. Cabooses, passenger and cab cars, reefers and stock cars. The generator behaves differently by car type and the clickety-clack is set by axle count, so it can be tuned per car. Is it a Tsunami2?No. It is the Tsunami SoundCar — 16-bit sound, but its own product built for rolling stock, not a Tsunami2 variant. Is a speaker included?No. Use any 8-ohm speaker that fits the car.

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The SoundTraxx CurrentKeeperIII is the smallest keep-alive module SoundTraxx has ever built — a compact 470µF power-backup that keeps your DCC locomotive running smoothly through brief power interruptions caused by dirty track, insulated frogs, or a momentary loss of electrical pickup. At just 10.1 x 6.8 x 4.2mm, it slips into the tightest installations where a full-size CurrentKeeper simply will not fit. Wired to a compatible sound or motor decoder, the CurrentKeeperIII stores enough energy to bridge short power dropouts (typically about 0.5 to 0.75 seconds), smoothing out flickering lights, stuttering motors, and interrupted sound during normal operation. It works in any scale, so it is at home in HO, N, O and beyond wherever space is at a premium. Looking for more DCC components? Browse our DCC Accessories, DCC Decoders, and the full SoundTraxx lineup. Features SoundTraxx's smallest CurrentKeeper yet — measures just 10.1 x 6.8 x 4.2mm for tight installs. 470µF capacity provides dependable short-term backup power during brief electrical interruptions. Typical hold time of approximately 0.5 to 0.75 seconds, depending on the locomotive, decoder, motor load and lighting. Bridges power loss from dirty track, insulated frogs and momentary pickup dropouts for smoother, more reliable running. Compatible with NMRA DCC Standards & Recommended Practices. Works in any scale — HO, N, O, S, G and Z. More Information Brand SoundTraxx Item Number 810164 Product Type CurrentKeeper / Keep-Alive Module Capacitance 470µF Dimensions 10.1 x 6.8 x 4.2mm Input Rating 16V or less; 100mA Scale All Scales (Multi Scale) Standards NMRA DCC Compatible Condition New FAQ What does a CurrentKeeper actually do?It is a keep-alive device. It stores electrical energy and feeds it back to your decoder when the wheels momentarily lose contact with the rails, so your locomotive keeps moving and its lights and sound stay on instead of cutting out. How is the CurrentKeeperIII different from the CurrentKeeper and CurrentKeeperII?The CurrentKeeperIII is SoundTraxx's most compact version at just 10.1 x 6.8 x 4.2mm. With a 470µF capacity it delivers a shorter hold time (about 0.5 to 0.75 seconds) than the larger units, making it ideal for small locomotives and tight installs where the full-size CurrentKeepers will not fit. Will it work with my decoder?The CurrentKeeperIII follows NMRA DCC Standards & Recommended Practices and works with decoders that provide a keep-alive / energy-storage connection. Check your decoder's documentation for the correct hookup points. What scales does it work in?Any scale. Because it is an electronic module, the CurrentKeeperIII can be installed in HO, N, O, S, G or Z locomotives wherever there is room for it. More Information Browse all DCC speakers and DCC wiring, shop the full SoundTraxx range, or pick a decoder from our DCC decoders.

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The SoundTraxx 881006 is an ECO-21PNEM Steam digital sound decoder. Econami is SoundTraxx’s value line: the same 16-bit sound and Hyperdrive2 motor control as Tsunami2, with a smaller sound library and a lower price. It carries 12 polyphonic sound channels and over 20 Hyperlight lighting effects. It is a full NMRA-compliant DCC decoder rated 1A, connecting by 21-pin dual-row bottom-entry nem connector. Features 16 whistles — Lunkenheimer, Hancock, Baldwin, ATSF, B&O, D&RGW, SP GS-4 No.4449, N&W No.611 and more 4 exhaust chuffs (light, medium, heavy, geared), 6 bells, 4 airpumps plus a vacuum pump, and 4 dynamos Dynamic Digital Exhaust (DDE) notches the exhaust to match the load on the motor Hyperdrive2 motor control for smooth, creep-speed switching Over 20 Hyperlight lighting effects across 6 function outputs 16-bit sound on 12 polyphonic channels, with a 7-band equalizer 28 functions, Flex-Map function remapping and switching mode CurrentKeeper ready — works with the SoundTraxx 810140 CurrentKeeper More Information Item Number: SoundTraxx 881006 Model: ECO-21PNEM Steam Sound Set: Econami Steam Decoder Size: 30.5 x 15.5mm Connection: 21-pin dual-row bottom-entry NEM connector Max. Motor Stall Current: 1A Function Outputs: 6 Audio Amplifier: 2 Watt, 8-Ohm Load DCC Track Voltage: 7V – 22V Sound Channels: 12 polyphonic Sound Resolution: 16-bit Shop the full SoundTraxx range, compare every DCC decoder we stock, or see the Steam / Steam-2 decoders. A speaker is not included — browse DCC speakers rated 2 watt, 8-ohm or better, and find install parts in DCC wiring. Add a SoundTraxx 810140 CurrentKeeper to keep sound alive over dirty track. FAQ How is Econami different from Tsunami2?Both are 16-bit with Hyperdrive2 motor control, 28 functions and 20+ lighting effects. Econami has a smaller sound library (4 chuffs, 16 whistles and 6 bells against Tsunami2’s 10, 90 and 12), 12 sound channels instead of 16, and no reverb. If your prototype is covered by the list above, Econami saves you real money. Is a speaker included?No. Pair it with any 8-ohm speaker rated 2 watt or better that fits your shell. Does it have Dynamic Digital Exhaust?Yes. The Econami steam decoders include DDE, which notches the exhaust automatically with the load on the motor. Will it fit my locomotive?It measures 30.5 x 15.5mm and connects by 21-pin dual-row bottom-entry nem connector. Check that against the space in your shell before ordering.

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