4
UNIDYNE® IV
MICROPHONE SERIES
Model
548
MODELS
548
. 548S . 548SD . 548SD-CN .
549
The
premier
member
of
the world-famed Unidyne
family
of
micro-
phones.
An
ultra-high-quality, super-rugged, dual impedance
microphone
with an effective cardioid
pickup
pattern. Smooth,
wide-range response
for
voice and music. Has all the superb feed-
back and
"boom"
suppressing characteristics
of
the Unidyne
III
(opposite page), combined with exceptionally rugged construc-
tion. Easily serviced in the field.
Specially cushioned reinforced
cartridge.
Model
548
Unidyne IV: For stand or hand use. Solderless imped-
ance change feature.
Supplied with
I5-foot
detachable heavy
duty
two-conductor shielded cable, with FEMALE professional
three-pin audio
connector*
on
microphone
end. Model A25B
Swivel Adapter included.
Model 548S Unidyne IV: For stand use. Mounted on a
lifetime
swivel
that
also contains an On-Off switch. Solderless impedance
change feature.
Supplied with
I5-foot
detachable heavy
duty
two-
conductor
shielded cable, with FEMALE professional three-pin
audio
connector*
on
microphone
end.
Model 548SD Unidyne IV: For stand
or
hand use. Features mag-
netic reed-type
On-Off switch
built
into the case, with built-in
locking plate to
permanently
lock
microphone
in
On
position.
Solderless impedance change feature. Supplied with
I5-foot
de-
tachable heavy
duty
two-conductor shielded cable, with FEMALE
professional three-pin audio
connector*
on
microphone
end.
Model A25B
Swivel Adapter included.
Model 548SD-CN Unidyne IV: Same
as
Model 548SD (above),
but
supplied
with
20-foot professional heavy
duty
two-conductor
shielded cable, with professional three-pin audio
connectors*
on
both ends of cable. Model A25B
Swivel Adapter included.
Model
549
Unidyne IV: Professional stage version of the Unidyne
IV
Series. Special vibration isolation shock
mount
to insulate
against vibration and mechanical shocks.
Ideal
for
performers
who carry
their
own
microphone
to clubs and
auditoriums.
Com-
bination impedance selection
On-Off switch. Cable not included.
*Designed
to
mate
with
Cannon
XL
series,
Switchcraft
A3 series
or
equivalent
connector.
SPECIFICATIONS
Frequency Response: 40 to 15,000 Hz.
Impedance
and Output Levels: Models 548, 548S, 548SD, 548SD-CN,
Dual.
Low
-
-57
db (0 db
~
1
milliwatt
per 10 microbars); .131 milli-
volts/microbar.
High -
-55
db (0 db ~ 1 volt per microbar); 1.76
millivolts/
microbar.
Model 549 -
Dual (25 -
50
ohms) - -
56
db (0 db ~ 1
milliwatt
per
10 microbars);
.067
millivolts/microbar.
(250 ohms) -
-56
db
(0
db
~
1
milliwatt
per 10 micrJbars); .149
millivolts/
microbar.
RECOMMENDED ACCESSORIES
Desk
Isolation Desk Isolation Distant Pickup
Iluick
Model Stand
Stand
Mount Stand
Disconnect
548 S33B.S37A
S39B
A55M
S55P
A45
548S
S33B,
S37A
S39B
~ ~
A47
548S0
(eN)
S33B.
S37A
S39B
~
-
A45
549
S33B
S39B
- -
A45
n
Unidyne®
Cardioid
Dynamic
Microphones
(18 pages)
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