Audio-Technica ( Iron Triangle ) BP4027 stereo super -directional microphone
Audio-Technica ( Iron Triangle ) BP4027 stereo super -directional microphone
Product Features :
Designed for broadcast , film shooting and recording engineer and design.
Small and severity of the structure that is ideal for camera pendant configuration.
Built- independent super directivity, and 8-shaped directional radio head .
With a high-pass filter switch, effectively reducing the environmental low frequency noise.
Optional non- MS matrix mode , the built-in matrix or both of the left and right stereo mode.
Product description :
BP4027 used in professional radio work , the need to provide 11V to 52V phantom power on the 2nd the 3rd pin output terminals and two XLR3M , you can use the console 's phantom power , you can also use the Audio-Technica AT8801 or AT8506 single-channel four-channel phantom power supply unit as a separate power supply.
Low impedance balanced audio output , the audio signal to male XLR output on the 2nd and the 3rd pin output terminals , and pin-1 is ground ( shield ) connection. Positive phase output phase will be located on level 2 pins. If connected to an unbalanced equipment must meet high quality balun transformers .
RoHS compliant microphone in the EU directive on hazardous substances .
Center / side channel : In the MS mode , BP4027 microphones provide independent channels and edges of the channel signal matrix mixer in the field , or for a broad and flexible stereo audio modulation during post-production.
Matrix stereo operation : BP4027 microphones built- in stereo matrix set two kinds of offers traditional left and right channel stereo signal output, and no special configuration matrix tuner. In line with the different audio environments , stereo microphone with a broad point matrix and narrow point stereo matrix selection , providing a broad or fine audiovisual environment. Positive phase output phase will be located on level 2 pins.
In order to obtain the correct left and right stereo positioning , need to "UP" text on the microphone up , and switch down . In all modes , the BP4027 should be close to the source , in order to reduce echo and reverb effects enhance stereo radio . Will narrow the stereo image and increase the " room echo" reverberation time away from the source.
BP4027 technical indicators
Element is fixed charge back plate , electrostatic capacitance
Ultra- directional and directional figure eight directivity
Frequency Response 30 ~ 20,000 Hz
High-pass filter 80 Hz, 12 dB / octave
Open the channel sensitivity : -30 dB (31.6 mV) re 1V at 1 Pa;
Side channel : -34 dB (19.9 mV) re 1V at 1 Pa;
Left and right stereo : -36 dB (15.8 mV) re 1V at 1 Pa
Impedance of 200 ohms
Maximum input sound pressure level in the channel : 123 dB SPL , 1 kHz at 1% THD;
Side -channel : 127 dB SPL , 1 kHz at 1% T.H.D.;
Left and right stereo : 126 dB SPL , 1 kHz at 1% THD
Dynamic Range ( typical value ) in the channel : 101 dB, 1 kHz at the highest sound pressure ;
Side -channel : 101 dB, 1 kHz at Max SPL ;
Left and right stereo : 102 dB, 1 kHz at Max SPL
Channel signal to noise ratio : 72 dB 1 kHz at 1 Pa;
Side channel : 68 dB SPL1 kHz at 1 Pa;
Left and right stereo : 70 dB 1 kHz at 1 Pa
Phantom Power DC 11 ~ 52V, 4mA typical power consumption at 48V
Switch MS ( in / side channel ) / LR-W ( Stereo - W ) / LR-N ( stereo - narrow ) ; high-pass filter
Weight 142 g
Dimensions 380.0 mm long , 21.0 mm diameter
Plug the built- XLRM-5 -pin XLR male
Wire 0.61 m long , two- connector cable , 2-core cable with shielded wires, plugs double XLR3M
Standard AT8405a 5/8 "-27 joint shaft bracket ;
AT8135 foam windscreen ;
5/ 8 " -27 to 3/ 8" -16 threaded adapter ;
Protective bag
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