<<i've been doing some research for a pal on some of the lower cost multi c=
hannel recorders & noticed this spec:
48 V + or - 4 V, 8 mA per 1 channel (20 mA or less in all channels - 4 chan=
nels)
that 'should' be enough to power most conventional mics but if some were co=
nnected that needed more what would the actual effect be in practice ? woul=
d only that input be affected or would the power across all inputs by decre=
ased ?>>
Most mics can run just fine on very little phantom current & diminished vol=
tage, however, I know from unpleasant experience that various Neumanns, bot=
h large & small diaphragm models, really do need the full 48 volts at their=
specified current. Running on less results in an audible loss of headroom.=
AKG & Shure condensers are spec'ed to work in the range of 9 to 52 volts. =
Since phantom power is distributed on a buss across all inputs, the current=
demand should be the sum of the 4 mics in use, with the more demanding mic=
s possibly running out of steam on peaks.
Scott Fraser
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