Our technology makes them better…

MRC Decoders Give you More...
More memory, more sounds, a difference you can hear… at this writing, our memory chips have four times more capacity than the nearest competitor. This lets us put up to 34 different horns and 14 different bell sounds on a single chip, plus multiple prime movers, so you can pick the one that’s right for you. Our cutting edge decoder technology means we can do more. More memory means we don’t have to skimp on realism. If it’s in the real world, we’ll capture it for your real-life layout.
Our Advanced Decoders Are Easy To Enjoy
Tiny drop-in sound decoders with matched speakers…

Want to change speakers? No need to test your soldering skills on a delicate PC board... because all our HO decoders have plugs for easy speaker change-outs. Just unplug one speaker and plug in another. MRC’s powerful speakers, aren’t just paired with any decoder. We make sure speakers are matched to decoders. The results are crisp, genuine sounds that elevate your model railroading enjoyment.
Sound Facts About Decoders
Why are our decoder sounds so loud? Because we have nothing to hide… we’re not ashamed of our sounds. Each one was recorded from real locos on a real railroad. And not massaged in a studio. We want you to hear it all… the clanging, moans, groans, hisses and squeaks. We want our decoders to express the symphony of heavy metal that signals a genuine loco is at work… including all the ambient sounds of a real railroad.
On the other hand, decoders using distorted, synthesized sounds don’t want you to hear everything. Look at it this way. You can always lower our sounds if you like. But when decoders have been programmed to maintain low volume you can’t ever raise it enough to hear the real sounds of a working railroad.
Find out what the competition doesn't want you to know about MRC sound decoders
Decoder Facts
- MRC offers by far the widest range of sound decoders
- Each decoder comes with matched speakers
- MRC decoders operate with all NMRA compatible DCC systems
- Our O, G, HO and N scale decoders fit in most popular locomotives
- For maximum realism, our sounds are recoded trackside from working engines, we don’t use computer generated or studio enhanced sounds
Decoder Differences

At MRC, our sound engineers go trackside and record each loco at its various speed notches. If the loco has eight notches, which most do, we record the eight notches in sequence as the RPMs are actually increasing. Our decoders allow you to hear a diesel motor actually change pitch relative to engine speed and load. When we say the sound is an actual SD45-2 with turbocharger or a specific GE or Alco loco, you can rest assured it’s for real.
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