AKG Acoustics Microphone C400BL User Manual

C 400BL  
Boundary Layer Condenser Microphone  
Description  
The AKG Model C 400 BL is a unidirectional boundary  
layer microphone intended for table top use. The  
microphones frequency range has been tailored for speech  
applications through a gentle bass roll-off below 200 Hz and  
a slight high frequency peak centered at 6 kHz, with a gentle  
roll-off above that frequency.  
The combination of both narrow pickup angle and  
frequency response limited to the voice range makes the  
microphone doubly insensitive to ambient noise, a design  
known as DNC (Dual Noise Canceling).  
The microphone has a high sensitivity of 13.5 mV/Pa and is  
available with either a 3-pin XLR connector or a B-lock jack  
for the Model C 400 BL/1. The microphone is universally  
phantom powered over the range from 9 to 52 volts dc.  
Cable length is 5 feet (1.5 meters).  
The microphones matte black finish can be painted to  
match surrounding decor.  
Specifications  
Transducer Principle: Condenser prepolarized  
Frequency Range:  
Polar Pattern:  
4014,000 Hz  
Hypercardioid  
Sensitivity at 1,000 Hz: 13.5 mV/Pa (-37 dBV)  
Equivalent Noise Level: < 32 dB-A  
Features  
Sound Pressure Level for 1% THD: 115 dB  
S/N Ratio (A-weighted) :> 62 dB  
• Small & inconspicuous  
• Speech optimized  
• Unidirectional pickup  
• Repaintable  
Electr. Impedance:  
Load Impedance:  
Power Requirement:  
Connector:  
< 200 ohms  
> 2,000 ohms  
1.5 to 15 volts  
3-Pin XLR-type  
(B-Lock Jack for C 400 BL-1)  
Cable Length:  
Finish:  
5 ft. (1.5 m)  
Non-reflective black  
Size:  
1.7 x 0.9 x 0.5 in.  
(43 x 23 x 13 mm)  
Net Weight:  
0.2 oz. (5.5 g)  
Included Accessories: Clip-on mounting plate,  
Phantom power adapter (for C400BL)  
Optional Accessories: B 18 Battery power supply  
 

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