Audio-Technica BP4025 Datasheet

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

EGEND LEGEND

LEGEND

2" or more on axis

Roll-off

8 kHz

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

†

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.;

55 dB SPL, with 10 dB pad

1 (nominal)

YNAMIC RANGE (typical) 131 dB, 1 kHz at Max SPL

IGNAL-TO-NOISE RATIO

0 dB, 1 kHz at 1 Pa*

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)

IMENSIONS 186.0 mm (7.32") long,

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

/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

Typical, A-weighted, using Audio Precision System One.

pecifications are subject to change without notice.

= 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