<s>
The	O
term	O
microphone	B-Algorithm
preamplifier	I-Algorithm
can	O
either	O
refer	O
to	O
the	O
electronic	O
circuitry	O
within	O
a	O
microphone	B-Application
,	O
or	O
to	O
a	O
separate	O
device	O
or	O
circuit	O
that	O
the	O
microphone	B-Application
is	O
connected	O
to	O
.	O
</s>
<s>
In	O
either	O
instance	O
,	O
the	O
purpose	O
of	O
the	O
microphone	B-Algorithm
preamplifier	I-Algorithm
is	O
the	O
same	O
.	O
</s>
<s>
A	O
microphone	B-Algorithm
preamplifier	I-Algorithm
is	O
a	O
sound	O
engineering	O
device	O
that	O
prepares	O
a	O
microphone	B-Application
signal	O
to	O
be	O
processed	O
by	O
other	O
equipment	O
.	O
</s>
<s>
Microphone	B-Application
signals	O
are	O
often	O
too	O
weak	O
to	O
be	O
transmitted	O
to	O
units	O
such	O
as	O
mixing	O
consoles	O
and	O
recording	O
devices	O
with	O
adequate	O
quality	O
.	O
</s>
<s>
Preamplifiers	O
increase	O
a	O
microphone	B-Application
signal	O
to	O
line	O
level	O
(	O
i.e.	O
</s>
<s>
A	O
microphone	B-Algorithm
preamplifier	I-Algorithm
is	O
colloquially	O
called	O
a	O
microphone	B-Algorithm
preamp	I-Algorithm
,	O
mic	B-Algorithm
preamp	I-Algorithm
,	O
micamp	O
,	O
preamp	O
(	O
not	O
to	O
be	O
confused	O
with	O
a	O
control	O
amplifier	O
in	O
high-fidelity	O
reproduction	O
equipment	O
)	O
,	O
mic	B-Algorithm
pre	I-Algorithm
and	O
pre	O
.	O
</s>
<s>
The	O
output	O
voltage	O
on	O
a	O
dynamic	O
microphone	B-Application
may	O
be	O
very	O
low	O
,	O
typically	O
in	O
the	O
1	O
to	O
100	O
microvolt	O
range	O
.	O
</s>
<s>
A	O
microphone	B-Algorithm
preamplifier	I-Algorithm
increases	O
that	O
level	O
by	O
up	O
to	O
70	O
dB	O
,	O
to	O
anywhere	O
up	O
to	O
10	O
volts	O
.	O
</s>
<s>
In	O
addition	O
to	O
providing	O
gain	O
for	O
the	O
microphone	B-Application
signal	O
,	O
a	O
microphone	B-Algorithm
preamplifier	I-Algorithm
as	O
found	O
in	O
a	O
sound	O
mixer	O
or	O
as	O
a	O
discrete	O
component	O
typically	O
also	O
provides	O
power	O
to	O
the	O
microphone	B-Application
in	O
the	O
form	O
of	O
either	O
24	O
or	O
48	O
volt	O
phantom	B-Algorithm
power	I-Algorithm
.	O
</s>
<s>
A	O
microphone	B-Application
is	O
a	O
transducer	B-Algorithm
and	O
as	O
such	O
is	O
the	O
source	O
of	O
much	O
of	O
the	O
coloration	O
of	O
an	O
audio	O
mix	O
.	O
</s>
<s>
Most	O
audio	O
engineers	O
would	O
assert	O
that	O
a	O
microphone	B-Algorithm
preamplifier	I-Algorithm
also	O
affects	O
the	O
sound	O
quality	O
of	O
an	O
audio	O
mix	O
.	O
</s>
<s>
A	O
preamplifier	O
might	O
load	O
the	O
microphone	B-Application
with	O
low	O
impedance	O
,	O
forcing	O
the	O
microphone	B-Application
to	O
work	O
harder	O
and	O
so	O
change	O
its	O
tone	O
quality	O
.	O
</s>
<s>
Some	O
microphones	B-Application
,	O
for	O
example	O
condensers	O
,	O
must	O
be	O
used	O
in	O
conjunction	O
with	O
an	O
impedance	O
matching	O
preamplifier	O
to	O
function	O
properly	O
.	O
</s>
