rebdoniel,
My rebbi in Halacha told me in the name of R’Elyashiv that the only problem with the modern microphone (the original microphones worked differently) was zilusa d’shabbos.
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rebdoniel,
My rebbi in Halacha told me in the name of R’Elyashiv that the only problem with the modern microphone (the original microphones worked differently) was zilusa d’shabbos.