Page 1
SPECIFICATIONS Output Level (at 1000 Hz) Low lmpedance .................... Open Circuit Voltage - 78 dB* (.I25 mV) .................................... Power Level -57 dB** Type Dynamic
Frequency Response
50 to 15,000 Hz (see Figure 1)
FREQUENCY
RESPONSE FIGURE 1
Polar Pattern Cardioid (unidirectional) pattern-Effective rejection of
sound at the rear of the microphone is uniform at all
frequencies, while front pickup characteristics are uniform
about the axis (see Figure
2)
I TYPICAL DIRECTIONAL PATTERN I
FIGURE 2
Impedance
DUAL. Low: Microphone rating impedance is 150 ohms
(270 ohms actual) for connection to microphone inputs
rated at 19 to 300 ohms.
High: Microphone impedance is "High" for connection to
high-impedance microphone inputs. Selection of impedance
made by choice of cable leads connected at equipment
end of cable (see section on lmpedance Selection).
POSITIVE PRESSIRE PRDWCES POSITIVE VOLTAGE ON PIN I OR PIN 3 AWMNOL MCOF
TYPE PLUG7
- - CABLE-PLUG CARTR~E GROW CASEOROUND ASSEMBLY
MODEL 545
TRANSFWYER?., RED AUMNOL MCOF ! 111: TYPE cwmcTm
CABLE- PLUG
CARTRIDGE GROUND CASE
GROUND
MODEL 545s
INTERNAL CONNECTIONS
FIGURE 3
WELL
High lmpedance .................... Open Circuit Voltage -55 dB* (1.76 mV) '0 dB = 1 volt per microbar **0 dB = 1 milliwatt per 10 microbars
Switch Model 545
- None
Model 5458 - Built in On-Off switch to control micro-
phone circuit. The switch is an integral part of the con-
nector assembly and is a slide-to-talk locking type switch
Cable 4.6 meter (15
ft) three-conductor shielded with Amphenol MC4M connector on the microphone end
Case Chrome-plated die casting with black
ARMO-DUR8q grille
and stainless steel screen
Dimensions See Figure 4
Net Weight
Model 545
- 255 grams (9 02.) Model 5458 - 425 grams (15 02.)
L 31.8 mm 11-114 IN)
MODEL 545
Z3.8 mm llS/lB IN.! MODEL 5455 OVERALL DIMENSIONS
FIGURE 4
FURNISHED ACCESSORY 545
545s
Swivel Adapter ................................ A25B
OPTIONAL ACCESSORIES
Line Matching Transformer
.......... A95 Series A95 Series
Vibration-Isolation Stand .............. S39A S39A Desk Stand ...................................... S33 S40A S37A, S40A Quick Disconnect Adapter ............ A45 A47 ..................................... Windscreen A2WS A2WS Carrying Case ............................... AC54 AC54S
REPLACEMENT PARTS
Dvnamic Cartridae .......................... R45 R45 cable and Plug assembly .............. C56 C56 .............................................. Sw~tch RK32S ................................ Case Assembly RK42C RK41 C ...................... Connector Assembly RK33CA ............................ Cable Connector RK117P RK117P ...... .................... Plug Element ... RK31 P RK31 P
GUARANTEE This Shure product is guaranteed in normal use to be free
from electrical and mechanical defects for a period of one
year from date of purchase. Please retain proof of purchase
date. This guarantee includes all parts and labor. This guar-
antee is in lieu of any and all other guarantees or warranties,
express or implied, and there shall be no recovery for any
consequential or incidental damages.
SHIPPING INSTRUCTIONS Carefully repack the unit and return it prepaid to:
Shure Brothers Incorporated
Attention: Service Department
1501 West Shure Drive
Arlington Heights, Illinois 60004
If outside the United States, return the unit to your dealer
or Authorized Shure Service Center for repair. The unit will
be returned to you prepaid.
