Audio-Technica BP4027 Datasheet

BP4027

1 kHz

LEGEND

LR Stereo-Wide (LR-W)

Polar Pattern

SCALE IS 5 DECIBELS PER DIVISION

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LEFT

1 kHz

RIGHT

1 kHz

LEGEND

Side

Polar Pattern

SCALE IS 5 DECIBELS PER DIVISION

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1 kHz

LEGEND

Mid

Polar Pattern

SCALE IS 5 DECIBELS PER DIVISION

120

150

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1 kHz

LEGEND

LR Stereo-Narrow (LR-N)

Polar Pattern

SCALE IS 5 DECIBELS PER DIVISION

120

150

210

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LEFT

1 kHz

RIGHT

LEGEND

Roll-off

12" or more on axis (flat)

Frequency in Hertz

Response in dB

10 dB

20k

10k

500

200100

Frequency Response

STEREO SHOTGUN MICROPHONE

• Designed for broadcasters, videographers and sound recordists

• Compact, lightweight design is perfect for camera-mount use

• Independent line-cardioid and figure-of-eight condenser elements

• Switchable low-frequency roll-off

• Switch selection of non-matrixed M-S mode and two internally-matrixed left/right stereo modes

MID-SIDE OPERATION: In M-S mode, the BP4027 provides independent Mid and Side signals. This allows the width of the stereo image to be adjusted in post production or in the field with a matrix mixer.

MATRIXED STEREO: The BP4027 offers two internally-matrixed modes which provide traditional “left-right” stereo without the need for external mixers. To accommodate varying acoustic environments, the user may select between a “wide” pattern (LR-W) with increased ambient pickup, and a “narrow” pattern (LR-N) which offers more rejection and less ambience. Output phase is “Pin 2 hot.”

For correct left-right stereo orientation, position the microphone so the word “UP” is on top, with the switches on the bottom. In all modes, locating the BP4027 nearer the sound source enhances the apparent width of the stereo image, while decreasing room ambience. Moving away from the sound source will result in a narrower stereo image and more “room sound.”

M-S Output Connector Pin 1 Pin 2 Pin 3 Mid XLR3M-Gray Ground Mid + Mid –

XLR5M Mic Connector: Pin 1 Pin 2 Pin 3

Side XLR3M-Red Ground Side + Side –

XLR5M Mic Connector: Pin 1 Pin 4 Pin 5

Matrix Output Connector Pin 1 Pin 2 Pin 3 Left XLR3M-Gray Ground L + L –

XLR5M Mic Connector: Pin 1 Pin 2 Pin 3

Right XLR3M-Red Ground R + R –

XLR5M Mic Connector: Pin 1 Pin 4 Pin 5

The BP4027 requires 11V to 52V DC phantom power on Pins 2 and 3 of both XLR3M connectors. Wiring must be balanced throughout, and all mic cables in the system must be wired consistently: Pin 1-to-Pin 1, etc. If connecting to unbalanced inputs, good-quality balanced line transformers m

ust be used.

The microphone is RoHS compliant–free from all substances specified in the EU directive on hazardous substances.

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.

BP4027 SPECIFICATIONS

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ELEMENTS Fixed-charge back plate

permanently polarized condenser

POLAR PATTERNS Line-cardioid and

figure-of-eight

FREQUENCY RESPONSE 30-20,000 Hz

LOW FREQUENCY ROLL-OFF 80 Hz, 12 dB/octave

OPEN CIRCUIT SENSITIVITY –30 dB (31.6 mV) /

(Mid / Side / LR Stereo) –34 dB (19.9 mV) /

–36 dB (15.8 mV) re 1V at 1 Pa*

IMPEDANCE 200 ohms

MAXIMUM INPUT SOUND LEVEL 123 dB / 127 dB / 126 dB SPL,

(Mid / Side / LR Stereo) 1 kHz at 1% T.H.D.

DYNAMIC RANGE (typical) 101 dB / 101 dB / 102 dB, (Mid / Side / LR Stereo) 1 kHz at Max SPL

SIGNAL-TO-NOISE RATIO

72 dB / 68 dB / 70 dB,

(Mid / Side / LR Stereo) 1 kHz at 1 Pa*

PHANTOM POWER 11-52V DC, 4 mA typical at 48V, REQUIREMENTS each channel

SWITCHES M-S, LR Stereo-Wide (LR-W),

LR Stereo-Narrow (LR-N); Flat, roll-off

WEIGHT (less cable and accessories)142 g (5.0 oz)

DIMENSIONS 380.0 mm (14.96") long,

21.0 mm (0.83") diameter

OUTPUT CONNECTOR Integral XLR5M-type

CABLE Dual 0.61 m (24") shielded

two-conductor, terminated in two XLR3M-type connectors

ACCESSORIES FURNISHED AT8405a stand clamp for 5/8"-27

threaded stands; AT8135 foam windscreen;5/8"-27 to 3/8"-16 threaded adapter; protective carrying case

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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.

Specifications 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