On Fri, May 30, 2008 at 09:24:32PM +0200, Arnold Krille wrote: > I don't really think this is a problem. Afaik the phantom-power-spec is to > provide something between 9 and 52 volts. 48V is only a common usage. > Unless I am prooven wrong... Many mics expect around 48V in series with two resistors somewhere between 5 and 10k (or half this value if the voltage is delivered to the center tap of an input transformer). The (AFAIK) unofficial spec is 45-50 volts unloaded, and being able to deliver at least 5 mA (some would say 10 mA) which roughly corresponds to the resister values given above. It is absolutely NOT normal that the voltage delivered to one mic depends on the presence of others. It must not drop even if all other lines are shorted to ground. Ciao, -- FA Laboratorio di Acustica ed Elettroacustica Parma, Italia Lascia la spina, cogli la rosa. _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/mailman/listinfo/linux-audio-user
