Compatibility - EM2 Speaker
With an impedance of 4 Ohms, these speakers can be used directly with all Loksound 4 and 5 decoders and some Zimo decoders (please check Zimo’s manuals and website for compatibility).
If you wish to use them with other decoder types (incl. Hornby TTS decoders), you must wire another 4 Ohm speaker in series (bringing the total impedance up to 8 Ohms), otherwise you risk damaging or destroying the amplifier on the chip.
These speakers are not compatible with LokSound 3.5 or earlier decoders.
There are of course other suppliers - but this might be helpful?
https://www.strathpefferjunction.com/product/earth-mover-em2-speaker-for-dcc-sound-4-ohm-1w-rms-ideal-for-loksound-4-5-some-zimo-decoders/