AKG Acoustics Microphone C562BL User Manual

C 562BL  
Boundary Layer Condenser Microphone  
Description  
The AKG Model C 562 BL condenser microphone is  
designed for boundary layer mounting in environments where  
a natural sound balance exists at one or more wall or floor  
boundaries. Primary applications include front-of-stage floor  
mounting, where proscenium and stage shell reflections often  
provide an accurate mixof all musical details, suitable for  
recording. Another primary application is as a table mounted  
microphone for picking up conversations from all directions,  
with none of the reflections, and consequent comb filtering,  
that plague microphones mounted on desk stands. In its role  
as a half spacemounted microphone, its sensitivity is 6 dB  
greater than if it were placed in free space. Its balance  
between mid-frequency and low-frequency response is  
directly related to the boundary perimeter. If it is used on a  
temporary boundary, that boundary should have a perimeter  
of 20 feet (6 meters) if smooth response is to be ensured  
down to the lowest frequencies. The extremely small  
diameter of the entrance to the electret transducer ensures  
that the difference between on-axis and off-axis frequency  
balance will be virtually zero. That is, sounds arriving from all  
angles will maintain their spectral integrity.  
Since the microphone normally operates in the transition  
region between direct and reverberant fields, a random  
incidence correctionhas been incorporated into the  
microphone's response. This consists of a smoothly rising  
response above 3 kHz that reaches an average level of +6 dB  
over the range from 5 to 15 kHz. This provides a subjective  
improvement in overall musical balance. In the recording  
studio, boundary layer microphones provide a handy solution  
to problems of micing the piano. They may be positioned in  
pairs on the underside of the cover, with the cover up or  
down, for surprisingly good stereo pickup.  
Features  
Specifications  
Transducer Principle: Pre-polarized condenser  
• Flat profile for accurate boundary  
mounting  
Frequency Range:  
Polar Pattern:  
2020,000 Hz  
Hemispherically omnidirectional  
Sensitivity at 1,00 Hz: 20 mV/Pa -34 dBV measured on a  
• Extended low and high frequency  
response  
• Uniform hemispherical response  
• High sensitivity (20 mV/Pa)  
• High acoustic level capability  
(130 dB-SPL for 1.0% THD)  
boundary at least 1.5 m by 1.5 m  
Equivalent Noise Level: 16 dB-A  
Sound Pressure Level for 1% THD: 130 dB  
S/N Ratio (A-weighted): 78 dB  
Electr. Impedance:  
Load Impedance:  
< 600 ohms  
> 2,000 ohms  
Power Requirement: Phantom powering, 952 volts  
Connector:  
Cable Length:  
Finish:  
3-pin XLR type  
10 ft. (3 m)  
Dark gray  
Size:  
6.3 in. (160 mm) diameter;  
thickness of plate 0.35 in. (9 mm)  
Net/Shipping Weight: 2.1 lbs. (0.95 kg)/4.2 lbs. (1.9 kg)  
Included Accessories: Foam-type windscreen  
 

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