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.
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.
