Digitrax SDXN167n18 | Series 7 Plug-in Next18 Sound Decoder | N Scale

The Digitrax SDXN167n18 is an N scale sound decoder on the Next18 plug, so in a Next18-equipped locomotive the install is a single connector and nothing else. It carries SoundFX v3 with eight CV-selectable steam and diesel sound schemes on board, which means one decoder covers a lot of different models, and new .spjs sound files can be loaded later with a Digitrax USB programmer.

Building a DCC fleet? Browse our DCC Decoders, DCC Speakers, and DCC Accessories.

• Next18 plug-in connector - no soldering, no harness. Fits the Atlas N FA-1 and other Next18-equipped N scale locomotives.
• 8 CV-selectable sound schemes included, steam and diesel, so you can match the decoder to the prototype without reloading anything.
• SoundFX v3 with reloadable .spjs sound files via a Digitrax USB programmer if you want something specific later.
• 6 FX3 function outputs for headlights and lighting effects alongside the sound functions.
• Motor drive rated to the Next18 connector capacity - sized for N scale mechanisms.

Does my locomotive have a Next18 socket?
Pull the shell and look for a small 18-pin connector, much smaller than a 21MTC and finer-pitched than an 8-pin socket. Manufacturers usually advertise it as "Next18 ready". The Atlas N FA-1 is one common example.

Is a speaker included?
No. Pick a speaker that fits your shell and matches the decoder impedance - in N scale that usually means a 13mm round or a small oval. Fitting it in a sealed baffle makes a large difference to the result.

What do the eight sound schemes cover?
A mix of steam and diesel prime movers, selectable by CV, so one decoder can serve several different models in your fleet without reloading sound.

Can I load a different sound file?
Yes. New .spjs files can be written to the decoder with a Digitrax USB programmer such as the PR4. Running the decoder needs no Digitrax hardware at all - any NMRA DCC system will do.