AKG Acoustics Microphone C747 User Manual

C 747  
Condenser Microphone  
Description  
The AKG Model C 747 gradient condenser microphone  
uses a short section interference tube to enhance its  
directional characteristics, making it an excellent choice for  
unobtrusive speech applications when mounted on a podium  
or lectern, or for teleconferencing activities. The microphone  
is about the size of a ballpoint pen and the mini-gooseneck  
extension facilitates adjustment and height. The finish is dark  
gray matte. Frequency response extends from 30 Hz to 18  
kHz, and polar response is very uniform. The microphone  
can handle sound pressure levels of 133 dB with only 1%  
THD and operates with phantom powering over the standard  
ranges from 12 to 48 volts.  
Specifications  
Transducer Principle: Pre-polarized condenser  
Frequency Range:  
Polar Pattern:  
3018,000 Hz  
Hypercardioid  
^
Features  
Sensitivity at 1,000 Hz: 8.5 mV/ Pa = -42 dBV  
Equivalent Noise Level: 21 dB-A  
• Slim profile for unobtrusive podium  
mounting  
• Extended low and high frequency  
response  
• Hypercardioid pattern for  
excellent off-axis rejection  
• High sensitivity (8.5 mV/Pa)  
Sound Pressure Level for 1% THD: 133 dB  
S/N Ratio (A-weighted): 73 dB  
Electr. Impedance:  
Load Impedance:  
Power Requirement:  
Connector:  
400 ohms  
> 1,500 ohms  
9-52 volts phantom powering  
3-pin XLR type  
10 ft. (3 m)  
Cable Length:  
Finish:  
Dark gray matte  
• High acoustic level capability  
(133 dB-SPL for 1.0% THD)  
Size:  
Dia 0.35 in. (9 mm),  
Length 5.4 in. (137 mm)  
Net/Shipping Weight: .9 oz. (25 g)/26.5 oz. (750 g)  
Included Accessories: H 47 Shock mount/adapter  
W 70 Windscreen,  
MSH 70 Short gooseneck,  
SA 47 Swivel stand adapter,  
SA 80 Clamp, SHZ 80 screw link  
Optional Accessories: ST 45, ST 46 Table stands  
MSH 80 Long gooseneck;  
B 18 E Battery supply  
MF-DA Mounting flange  
 

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