Visaton r 10 s 4in fullrange speaker visaton r 10 s 4 ohm the visaton r 10 s 4omega is a 10cm 4 inch full range speaker with high efficiency and balanced frequency response especially suitable as control speaker for electronic devices equivalent to model r 10 s te but with connectors 52 x 05 mm and 28 x 05 mm typical applications include control speakers for electronic devices ceiling mounted speakers in railway carriages and model construction visaton r 10 s 4 ohm inch