Train Control Systems

You haven't heard WOWSound until you've heard it through the 28 mm High-Bass 4 W WOWSpeaker. It handles an unprecedented 4 watts and uses a bass-reflex chamber to pack a big low-end punch — the new standard for sound in larger HO, O, and G-scale models. Pair it with a sound decoder from our DCC Decoders collection, browse more DCC Accessories, or shop the full Train Control Systems lineup. Features Handles a big 4 W of power with a bass-reflex chamber for deep, room-filling sound. 28 mm (1.1") round driver — ideal for larger HO, O, and G-scale installs. 8 Ω WOWSpeaker — works with TCS WOWSound and most other-brand DCC sound decoders. Works with any scale that has room to mount it. More Information Brand Train Control Systems (TCS) Item Number 1694 Type WOWSpeaker (DCC sound speaker) Size 28 mm (1.1") round Power 4 W Impedance 8 Ω Condition New FAQ What decoders does this work with?It's an 8 Ω speaker that works with TCS WOWSound decoders and virtually any other DCC sound decoder rated for an 8-ohm load. Do I need an enclosure or baffle?Yes. Speakers need a sealed enclosure or baffle (or a sealed cavity in the shell) to move air and produce full sound — mounting it in open air will sound thin. What scales can use it?Any scale with enough room to mount it. Smaller drivers suit N and HO; larger round and high-bass speakers shine in HO, O, and G.

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The TCS WOW501 is a universal 5-amp WOWSound decoder built for large-scale (O and G) locomotives, with Keep-Alive® on board for stutter-free running. Function outputs 5 and 6 can drive a coil-and-fan smoke unit, and setting CV58 to a value of 9 syncs the smoke to the chuff timing. This is the Steam version, delivering TCS's authentic steam sound set with synchronized chuff and a full suite of whistle, bell, and running effects. An on-board Keep-Alive® keeps it running smoothly across dirty track and dead frogs — no add-on capacitor needed. Pick a matching speaker from our DCC Accessories collection, browse more DCC Decoders, or shop the full Train Control Systems WOWSound lineup. Features CD-quality WOWSound — 16-bit audio at a 44.1 kHz sample rate. Authentic TCS's authentic steam sound set with synchronized chuff and a full suite of whistle, bell, and running effects. Back-EMF load compensation for superior slow-speed control under load. Quiet Drive super-quiet motor control for buzz-free running. Variable Momentum for custom acceleration and deceleration curves. Audio Assist® menu programming — set up sound and CVs right on the track, no computer required. Universal hard-wire decoder with a 5-amp output; F5/F6 can drive a coil-and-fan smoke unit. On-board Keep-Alive® for stutter-free operation over dirty track. More Information Brand Train Control Systems (TCS) Item Number 1600 Decoder WOW501 Type WOWSound DCC Sound Decoder Sound Steam Connection Universal hard-wire, 5 A output On-board Keep-Alive Yes Scale Large Scale (O / G) Condition New FAQ Will this decoder fit my locomotive?The WOW501 is built for large-scale (O and G) locomotives and is hard-wired; its 5-amp output handles the bigger motors found in large-scale models. Do I need a separate speaker?Yes — this is the decoder only. Add a WOWSpeaker (or any 8 Ω DCC speaker) sized for your locomotive to hear the sound. What is Audio Assist?It's TCS's on-the-fly programming menu that walks you through sound and CV setup using your throttle and the decoder's own spoken prompts — no programming track or computer needed.

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The TCS WOW101 is a universal WOWSound decoder for HO locomotives with a 9-pin JST plug, or any loco that can't accept a motherboard or WOWKit. It plugs straight into a 9-pin socket or hard-wires in, works with TCS T-Series harnesses, and includes an auxiliary harness for your speaker, CAM, and Keep-Alive connections. This is the Diesel version with TCS's selectable prime-mover sound sets — choose between EMD, Alco, Baldwin/others, and GE engine sounds to match your prototype. An on-board Keep-Alive® keeps it running smoothly across dirty track and dead frogs — no add-on capacitor needed. Pick a matching speaker from our DCC Accessories collection, browse more DCC Decoders, or shop the full Train Control Systems WOWSound lineup. Features CD-quality WOWSound — 16-bit audio at a 44.1 kHz sample rate. Selectable TCS's selectable prime-mover sound sets choose between EMD, Alco, Baldwin/others, and GE engine sounds to match your prototype. Back-EMF load compensation for superior slow-speed control under load. Quiet Drive super-quiet motor control for buzz-free running. Variable Momentum for custom acceleration and deceleration curves. Audio Assist® menu programming — set up sound and CVs right on the track, no computer required. Plugs into a 9-pin JST socket or hard-wires in; compatible with TCS T-Series harnesses. On-board Keep-Alive® for stutter-free operation over dirty track. More Information Brand Train Control Systems (TCS) Item Number 1533 Decoder WOW101-KA Type WOWSound DCC Sound Decoder Sound Diesel Connection 9-pin JST plug or hard-wire (T-Series harness compatible) On-board Keep-Alive Yes Scale HO Scale Condition New FAQ Will this decoder fit my locomotive?The WOW101 suits any HO loco with a 9-pin JST plug or one you can hard-wire. It is compatible with TCS T-Series plug-and-play harnesses for many popular models. Do I need a separate speaker?Yes — this is the decoder only. Add a WOWSpeaker (or any 8 Ω DCC speaker) sized for your locomotive to hear the sound. What is Audio Assist?It's TCS's on-the-fly programming menu that walks you through sound and CV setup using your throttle and the decoder's own spoken prompts — no programming track or computer needed.

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The TCS WOW101 is a universal WOWSound decoder for HO locomotives with a 9-pin JST plug, or any loco that can't accept a motherboard or WOWKit. It plugs straight into a 9-pin socket or hard-wires in, works with TCS T-Series harnesses, and includes an auxiliary harness for your speaker, CAM, and Keep-Alive connections. This is the Diesel version with TCS's selectable prime-mover sound sets — choose between EMD, Alco, Baldwin/others, and GE engine sounds to match your prototype. Pick a matching speaker from our DCC Accessories collection, browse more DCC Decoders, or shop the full Train Control Systems WOWSound lineup. Features CD-quality WOWSound — 16-bit audio at a 44.1 kHz sample rate. Selectable TCS's selectable prime-mover sound sets choose between EMD, Alco, Baldwin/others, and GE engine sounds to match your prototype. Back-EMF load compensation for superior slow-speed control under load. Quiet Drive super-quiet motor control for buzz-free running. Variable Momentum for custom acceleration and deceleration curves. Audio Assist® menu programming — set up sound and CVs right on the track, no computer required. Plugs into a 9-pin JST socket or hard-wires in; compatible with TCS T-Series harnesses. More Information Brand Train Control Systems (TCS) Item Number 1530 Decoder WOW101 Type WOWSound DCC Sound Decoder Sound Diesel Connection 9-pin JST plug or hard-wire (T-Series harness compatible) On-board Keep-Alive No Scale HO Scale Condition New FAQ Will this decoder fit my locomotive?The WOW101 suits any HO loco with a 9-pin JST plug or one you can hard-wire. It is compatible with TCS T-Series plug-and-play harnesses for many popular models. Do I need a separate speaker?Yes — this is the decoder only. Add a WOWSpeaker (or any 8 Ω DCC speaker) sized for your locomotive to hear the sound. What is Audio Assist?It's TCS's on-the-fly programming menu that walks you through sound and CV setup using your throttle and the decoder's own spoken prompts — no programming track or computer needed.

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The TCS WOW501 is a universal 5-amp WOWSound decoder built for large-scale (O and G) locomotives, with Keep-Alive® on board for stutter-free running. This is the Diesel version with TCS's selectable prime-mover sound sets — choose between EMD, Alco, Baldwin/others, and GE engine sounds to match your prototype. An on-board Keep-Alive® keeps it running smoothly across dirty track and dead frogs — no add-on capacitor needed. Pick a matching speaker from our DCC Accessories collection, browse more DCC Decoders, or shop the full Train Control Systems WOWSound lineup. Features CD-quality WOWSound — 16-bit audio at a 44.1 kHz sample rate. Selectable TCS's selectable prime-mover sound sets choose between EMD, Alco, Baldwin/others, and GE engine sounds to match your prototype. Back-EMF load compensation for superior slow-speed control under load. Quiet Drive super-quiet motor control for buzz-free running. Variable Momentum for custom acceleration and deceleration curves. Audio Assist® menu programming — set up sound and CVs right on the track, no computer required. Universal hard-wire decoder with a 5-amp output for large-scale motors. On-board Keep-Alive® for stutter-free operation over dirty track. More Information Brand Train Control Systems (TCS) Item Number 1605 Decoder WOW501 Type WOWSound DCC Sound Decoder Sound Diesel Connection Universal hard-wire, 5 A output On-board Keep-Alive Yes Scale Large Scale (O / G) Condition New FAQ Will this decoder fit my locomotive?The WOW501 is built for large-scale (O and G) locomotives and is hard-wired; its 5-amp output handles the bigger motors found in large-scale models. Do I need a separate speaker?Yes — this is the decoder only. Add a WOWSpeaker (or any 8 Ω DCC speaker) sized for your locomotive to hear the sound. What is Audio Assist?It's TCS's on-the-fly programming menu that walks you through sound and CV setup using your throttle and the decoder's own spoken prompts — no programming track or computer needed.

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This 25 x 14 mm oval WOWSpeaker is a tough little beast: it accepts 2 watts of audio while staying clear and accurate, and its military-spec build is dust-proof and IPX5 water-resistant. Small enough for most steam tenders and dedicated diesel installs. Pair it with a sound decoder from our DCC Decoders collection, browse more DCC Accessories, or shop the full Train Control Systems lineup. Features Accepts 2 W while staying clear and accurate. Military-spec build — dust-proof and IPX5 water-resistant. 25 x 14 mm oval footprint fits most steam tenders and diesel installs. 8 Ω WOWSpeaker — works with TCS WOWSound and most other-brand DCC sound decoders. Works with any scale that has room to mount it. More Information Brand Train Control Systems (TCS) Item Number 1697 Type WOWSpeaker (DCC sound speaker) Size 25 x 14 mm oval Power 2 W Impedance 8 Ω Condition New FAQ What decoders does this work with?It's an 8 Ω speaker that works with TCS WOWSound decoders and virtually any other DCC sound decoder rated for an 8-ohm load. Do I need an enclosure or baffle?Yes. Speakers need a sealed enclosure or baffle (or a sealed cavity in the shell) to move air and produce full sound — mounting it in open air will sound thin. What scales can use it?Any scale with enough room to mount it. Smaller drivers suit N and HO; larger round and high-bass speakers shine in HO, O, and G.

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The TCS A4X is a four-function HO-scale "drop-in" DCC mobile decoder for popular Atlas, Athearn, and Kato diesels — a clean, no-solder upgrade on supported models. Examples include the Athearn F59PHI and F3; Atlas RS-1, RS-3, RS-11, C424, and GP7; and the Kato GP35. If you need more than four functions or plan to run 1.5V bulbs, step up to the A6X. Browse more DCC Decoders and DCC Accessories, or shop the full Train Control Systems lineup. Features Four-function HO drop-in mobile decoder for supported Atlas, Athearn, and Kato diesels. Back-EMF load compensation for superior slow-speed control under load. Quiet Drive super-quiet motor control for buzz-free running. No-solder installation on supported drop-in locomotives. Step up to the A6X for six functions or 1.5V bulbs. More Information Brand Train Control Systems (TCS) Item Number 1000 (A4X) Type DCC Mobile Decoder (drop-in) Functions 4 Fits Many Atlas / Athearn / Kato HO diesels Scale HO Scale Condition New FAQ Will it fit my locomotive?The A4X drops into many Atlas, Athearn, and Kato HO diesels (for example Athearn F59PHI/F3; Atlas RS-1/RS-3/RS-11/C424/GP7; Kato GP35). Check the TCS drop-in chart for your model. Does it include sound?No — it is a motor and function (mobile) decoder. For sound, see the TCS WOW series. A4X or A6X?The A4X covers four-function installs; choose the A6X if you need six functions or the 1.5V bulb supply.

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The 32 mm (1.26") round, 5.1 mm deep WOWSpeaker produces the clarity and volume of a much larger driver, making it ideal for tight installations that still demand BIG sound. Pair it with a sound decoder from our DCC Decoders collection, browse more DCC Accessories, or shop the full Train Control Systems lineup. Features 32 mm (1.26") round, 5.1 mm deep driver delivers big, clear sound from a compact footprint. Great for tight HO and N installs that still need real volume. 8 Ω WOWSpeaker — works with TCS WOWSound and most other-brand DCC sound decoders. Works with any scale that has room to mount it. More Information Brand Train Control Systems (TCS) Item Number 1695 Type WOWSpeaker (DCC sound speaker) Size 32 mm (1.26") round, 5.1 mm deep Impedance 8 Ω Condition New FAQ What decoders does this work with?It's an 8 Ω speaker that works with TCS WOWSound decoders and virtually any other DCC sound decoder rated for an 8-ohm load. Do I need an enclosure or baffle?Yes. Speakers need a sealed enclosure or baffle (or a sealed cavity in the shell) to move air and produce full sound — mounting it in open air will sound thin. What scales can use it?Any scale with enough room to mount it. Smaller drivers suit N and HO; larger round and high-bass speakers shine in HO, O, and G.

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The Train Control Systems KA1 Keep-Alive® is a compact stay-alive capacitor pack that feeds backup power to your DCC decoder whenever the wheels lose contact with the rails. No more stalling on dirty track, dead frogs, or insulated turnouts. The KA1 comes in at about half the size of a KA3 and delivers roughly one-third the capacitance of a KA3/KA4, making it a great choice where space is tight in N and smaller HO locomotives. It includes Blue and Black-with-White-stripe lead wires to solder to your decoder's keep-alive pads (V+ and ground), so it works with TCS and most other-brand decoders that accept an external keep-alive. Browse more decoder add-ons in our DCC Accessories collection, shop the full Train Control Systems lineup, or pair it with a new sound decoder from our DCC Decoders collection. Features Keep-Alive® stay-alive capacitor pack eliminates stalling on dirty track, dead frogs, and insulated rail joints. Compact — about half the size of a KA3; delivers roughly one-third the capacitance of a KA3/KA4. Includes Blue and Black/White lead wires to solder to your decoder's keep-alive pads — works with TCS and most other-brand decoders. Dimensions: 1.063" x 0.35" x 0.244" (27 x 8.9 x 6.2 mm). Input rating 12–16V; works with any scale and any DCC system. More Information Brand Train Control Systems (TCS) Item Number 1454 (KA1) Type Keep-Alive / Stay-Alive Capacitor Pack Connection Blue + Black/White Wire Leads (solder-on) Dimensions 1.063" x 0.35" x 0.244" (27 x 8.9 x 6.2 mm) Input Rating 12–16V Scale Any Scale Condition New FAQ What does a Keep-Alive actually do?It stores an electrical charge and feeds it to your decoder when track power drops out, so the locomotive keeps moving and its lights and sound stay on across dirty track, frogs, and gaps. How do I connect the KA1?Solder the Blue wire to your decoder's keep-alive positive (V+) pad and the Black/White wire to the ground pad. It works with TCS decoders and most other brands that offer keep-alive connections — check your decoder's manual for the correct pads. Why choose the KA1 over a larger KA3/KA4?It's much smaller and fits where bigger packs won't — ideal for N scale and cramped HO shells. It holds less charge, so for longer run-through use a KA3 or KA4 if you have the room.

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The TCS FL4 is a function-only DCC decoder for any scale, adding up to four extra lighting and effect outputs wherever you need them — commonly used for smoke coils, fireboxes, ditch lights, and step lights. Note: FL-series "Fleet Lighter" decoders do not provide motor control, so pair the FL4 with a separate mobile decoder. Browse more DCC Decoders and DCC Accessories, or shop the full Train Control Systems lineup. Features Function-only decoder — adds up to four lighting and effect outputs. Works in any scale; great for smoke coils, fireboxes, ditch lights, and step lights. Pairs with any mobile (motor) decoder — the FL4 handles lights only. Compact "Fleet Lighter" design fits where a full decoder will not. More Information Brand Train Control Systems (TCS) Item Number 1004 (FL4) Type Function-Only DCC Decoder (Fleet Lighter) Functions 4 Motor Control No (function-only) Scale Any Scale Condition New FAQ Does the FL4 control the motor?No — FL-series decoders are function-only. Use a separate mobile decoder for the motor and let the FL4 drive extra lights and effects. What is it used for?Lighting and effects the main decoder cannot handle — smoke coils, fireboxes, ditch lights, step lights, and similar. What scales can use it?Any scale — it is a small, universal function decoder.

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The TCS B-MB4 is a replacement motherboard for the Bachmann Richmond 4-4-0, accepting a 21-pin WOW121 or EU621 decoder for a quick, clean install. An on-board KA2 Keep-Alive® keeps the little 4-4-0 running smoothly over dirty track and frogs, and the universal layout also makes the B-MB4 a great choice for brass models. Browse more DCC Accessories and DCC Decoders, or shop the full Train Control Systems lineup. Choosing Your Pin Height The B-MB4 ships in two 21-pin connector heights so the board seats correctly against your decoder. Choose Low Pins for TCS decoders (WOWSound 121, EU621), or High Pins for Soundtraxx & ESU decoders — just match the option to your decoder’s brand. Features Replacement motherboard for the Bachmann Richmond 4-4-0. Accepts a 21-pin WOW121 or EU621 decoder for fast installation. On-board KA2 Keep-Alive® for stutter-free running. Universal design — also well suited to brass model installs. More Information Brand Train Control Systems (TCS) Item Number 1557 (B-MB4) Type DCC Motherboard / Decoder Interface Decoder Interface 21-pin (WOW121 or EU621) On-board Keep-Alive Yes (KA2) Fits Bachmann Richmond 4-4-0; universal / brass Scale HO Scale Condition New FAQ What does this motherboard do?It replaces the factory circuit board so you can drop in a 21-pin WOW121 or EU621 decoder, and it adds an on-board KA2 Keep-Alive for smooth running. What locomotive is it for?It is designed for the Bachmann Richmond 4-4-0, and its universal layout also suits many brass models. Does it include a decoder?No — add a WOW121 or EU621 decoder to complete the install.

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The Train Control Systems KA3 Keep-Alive® is a compact stay-alive capacitor pack that feeds backup power to your DCC decoder whenever the wheels lose contact with the rails. No more stalling on dirty track, dead frogs, or insulated turnouts — the KA3 keeps a locomotive running with its lights and sound on for roughly 6 to 20 seconds during a power interruption (depending on the locomotive and motor). It includes Blue and Black-with-White-stripe lead wires to solder to your decoder's keep-alive pads (V+ and ground), so it works with TCS and most other-brand decoders that accept an external keep-alive. Browse more decoder add-ons in our DCC Accessories collection, shop the full Train Control Systems lineup, or pair it with a new sound decoder from our DCC Decoders collection. Features Keep-Alive® stay-alive capacitor pack eliminates stalling on dirty track, dead frogs, and insulated rail joints. Powers an HO locomotive with lights on for approximately 6 to 20 seconds during a power interruption. Includes Blue and Black/White lead wires to solder to your decoder's keep-alive pads — works with TCS and most other-brand decoders. Input rating 12–16V; works with any scale and any DCC system. More Information Brand Train Control Systems (TCS) Item Number 2000 (KA3) Type Keep-Alive / Stay-Alive Capacitor Pack Connection Blue + Black/White Wire Leads (solder-on) Input Rating 12–16V Scale Any Scale Condition New FAQ What does a Keep-Alive actually do?It stores an electrical charge and feeds it to your decoder when track power drops out, so the locomotive keeps moving and its lights and sound stay on across dirty track, frogs, and gaps. How do I connect the KA3?Solder the Blue wire to your decoder's keep-alive positive (V+) pad and the Black/White wire to the ground pad. It works with TCS decoders and most other brands that offer keep-alive connections — check your decoder's manual for the correct pads. How long will it keep my loco running?Expect roughly 6 to 20 seconds with headlights on for a typical HO locomotive, depending on motor efficiency and current draw.

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