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BP4025
SCALE IS 5 DECIBELS PER DIVISION SCALE IS 5 DECIBELS PER DIVISIONSCALE IS 5 DECIBELS PER DIVISION
Polar Pattern Polar PatternPolar Pattern
200 Hz 1 kHz
L
EGEND LEGEND
LEGEND
1
2" or more on axis
Roll-off
8 kHz
L
EGEND
Frequencyin Her tz
Frequency Response
Response in dB
X/Y STEREO FIELD RECORDING MICROPHONE
• Designed for broadcast and professional recording, and field use
• Unique coincident capsule configuration produces accurate stereo
image in smaller housing
• Large-diaphragm capsules for pristine sound quality and
exceptionally low noise
• Compact, lightweight design is ideal for camera-mount use
• Excellent channel separation
• Integral 80 Hz HPF switch and 10 dB pad
The BP4025 is intended for use in professional applications where
remote power is available. It requires 11V to 52V DC phantom power,
which may be provided by an audio mixer, or by a separate, in-line
source such as the Audio-Technica AT8801 single-channel or
CP8506 four-channel phantom power supplies.
Output for each stereo channel is low impedance (Lo-Z) balanced.
The balanced signals appear across Pins 2 and 3 for the left channel,
Pins 4 and 5 for the right channel. Pin 1 is ground (shield) for both
channels. Output is “Pins 2 and 4 hot” — positive acoustic pressure
produces positive voltage at Pins 2 and 4.
Locating the BP4025 nearer the sound source enhances the width of
the stereo image, while decreasing room ambience. Conversely, as
the mic position moves away from the sound source, a narrower
left/right stereo image results and more of the “room sound” is noted.
An integral 80 Hz hi-pass filter provides easy switching from a flat
frequency response to a low-end roll-off. The roll-off position reduces
the pickup of low-frequency ambient noise (such as traffic, airhandling systems, etc.), room reverberation and mechanically
coupled vibrations.
The BP4025 is also equipped with a switchable 10 dB pad that lowers the microphone's sensitivity, thus providing higher SPL capability
for flexible use for a wide range of speakers/performers and system
configurations.
Avoid leaving the microphone in the open sun or in areas where
temperatures exceed 110° F (43° C) for extended periods. Extremely
high humidity should also be avoided.
P4025 SPECIFICATIONS
B
†
ELEMENT Fixed-charge back plate
permanently polarized condenser
HANNEL BALANCE <2.5 dB
C
POLAR PATTERN X/Y Stereo
REQUENCY RESPONSE 20-17,000 Hz
F
LOW FREQUENCY ROLL-OFF 80 Hz, 12 dB/octave
PEN CIRCUIT SENSITIVITY –32 dB (25.1 mV) re 1V at 1 Pa*
O
IMPEDANCE 170 ohms
AXIMUM INPUT SOUND LEVEL 145 dB SPL, 1 kHz at 1% T.H.D.;
M
55 dB SPL, with 10 dB pad
1
(nominal)
YNAMIC RANGE (typical) 131 dB, 1 kHz at Max SPL
D
IGNAL-TO-NOISE RATIO
S
1
0 dB, 1 kHz at 1 Pa*
8
PHANTOM POWER REQUIREMENTS 11-52V DC, 7 mA typical
both channels total)
(
SWITCHES Flat, roll-off; 10 dB pad (nominal)
EIGHT (less cable and accessories) 269 g (9.5 oz)
W
IMENSIONS 186.0 mm (7.32") long,
D
47.6 mm (1.87") head diameter
21.0 mm (0.83") body diameter
OUTPUT CONNECTOR Integral 5-pin XLRM-type
CABLES 5.0 m (16.5') long, 8 conductor,
shielded, vinyl-jacketed stereo
cable with 5-pin XLRF-type
connector at microphone end and
two 3-pin XLRM-type connectors
at output end
ACCESSORIES FURNISHED AT8405a stand clamp for
5
/8"-27
threaded stands; windscreen; soft
protective pouch
†In the interest of standards development, A.T.U.S. offers full details on its test
methods to other industry professionals on request.
*1 Pascal = 10 dynes/cm
1
Typical, A-weighted, using Audio Precision System One.
pecifications are subject to change without notice.
S
2
= 10 microbars = 94 dB SPL
Audio-Technica U.S., Inc., 1221 Commerce Drive, Stow, Ohio 44224
Audio-Technica Limited, Old Lane, Leeds LS11 8AG England
www.audio-technica.com
P52060 ©2008 Audio-Technica U.S., Inc. Printed in Japan