LokSound V4.0 and LokSound micro V4.0 decoders need the a speaker with an impendance of 4 Ohms. With the present 100 Ohms loudspeakers you would hardly hear anything. Conversely, you must never use a 4 Ohms speakers with the previous LokSound V3.5 decoder. The decoder could be destroyed! When the decoder is replaced, the speaker must! be changed as well.
Speakers for Decoders with LokSound V4.0 and LokSound micro V4.0