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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 Applica-
tions Group at (847) 866-2525 for more information.
SPECIFICATIONS
Type
Dynamic
Frequency Response
100 to 5,000 Hz (Figure 2)
TYPICAL FREQUENCY RESPONSE
Polar Pattern
Omnidirectional
Impedance
High, unbalanced
Load Impedance Range
Minimum: 100 k
Output Level (at 1,000 Hz)
Open Circuit Voltage
*1 Pa = 94 dB SPL
Polarity
Positive sound pressure on diaphragm produces posi-
tive voltage on tip with respect to sleeve (ground) of mi-
crophone output 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, unbalanced connection)
FIGURE 2
. . . . . .
–34.0 dBV/Pa (20 mV)*
3
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