3
LOW IMPEDANCE
To connect the 520DX to a low impedance device, such as a
mixer, use a low-to-high impedance-matching line transformer,
such as the Shure model A95U.
NOTE: The 520DX can be rewired for low impedance, but this
disables the volume control. Contact the Shure Applications
Group at (847) 600-8440 for more information.
SPECIFICATIONS
Type
Dynamic
Frequency Response
100 to 5,000 Hz (Figure 2)
TYPICAL FREQUENCY RESPONSE
FIGURE 2
Polar Pattern
Omnidirectional
Impedance
High, unbalanced
Load Impedance Range
Minimum: 100 kΩ
Output Level (at 1,000 Hz)
Open Circuit Voltage –38.0 dBV/Pa (13 mV)*
*1 Pa = 94 dB SPL
Polarity
Positive sound pressure on diaphragm produces positive volt-
age on tip with respect to sleeve (ground) of microphone out-
put phone plug connector
Cable
6.1 m (20 ft) two conductor shielded with standard 1/4-inch
phone plug attached (supplied wired for high-impedance, un-
balanced connection)
Case
Green and chrome finished die casting
Dimensions
63 mm (2.5 in) max diameter, 82.6 mm (3 1/4 in) long
Net Weight (with cable)
737 grams (26 oz)
200001000 1000050 100
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+10
0
-10
Hz
dB
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