Audio-Technica BP4071L - Manual

• Overall length of 21.22" with an extremely narrow, highly

directional pickup pattern

• Ideal for use in broadcasting, film/TV production, and theater

sound reinforcement

• Direct-coupled, balanced output ensures a clean signal even in

high-output conditions

• Transformerless design for improved pickup of transients

• Rugged housing made of lightweight structural-grade

aluminum alloy

• Interference tube design for narrow acceptance angle

• Switchable 80 Hz high-pass filter & 10 dB pad

• RoHS-compliant – free from all substances specified in the EU

directive on the reduction of hazardous substances (RoHS)

The BP4071L is intended for use in professional applications where

remote power is available. It requires 48V DC phantom power, which

may be provided by a mixer or console, or by a separate, in-line

phantom power supply.

O u t p u t f r o m t h e m i c r o p h o n e ’ s X L R M - t y p e c o n n e c t o r i s l o w

impedance (Lo-Z) balanced. The signal appears across Pins 2 and

3; Pin 1 is ground (shield). Output phase is “Pin 2 hot” – positive

acoustic pressure produces positive voltage at Pin 2.

To avoid phase cancellation and poor sound, all mic cables must be

wired consistently: Pin 1-to-Pin 1, etc.

An integral 80 Hz high-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, air-handling systems, etc.), room reverberation and

mechanically coupled vibrations.

The BP4071L 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. To engage the 10 dB pad, use the end

tip of a paperclip or other small pointed instrument to slide the switch

toward the -10 position.

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.

Audio-Technica U.S., Inc.,

1221 Commerce Drive, Stow, Ohio 44224

Audio-Technica Limited,

Old Lane, Leeds LS11 8AG England

www.audio-technica.com

P52088 ©2008 Audio-Technica U.S., Inc. Printed in Japan

BP4071L

BP4071L SPECIFICATIONS

†

ELEMENT

Externally polarized (DC bias)

capacitor

POLAR PATTERN

Line + gradient

FREQUENCY RESPONSE

20-18,000 Hz

LOW FREQUENCY ROLL-OFF

80 Hz, 12 dB/octave

OPEN CIRCUIT SENSITIVITY

–29 dB (35.5 mV) re 1V at 1 Pa*

IMPEDANCE

50 ohms

MAXIMUM INPUT SOUND LEVEL

141 dB SPL, 1 kHz at 1% T.H.D.;

151 dB SPL, with 10 dB pad

(nominal)

NOISE

1

13 dB SPL

DYNAMIC RANGE

(typical)

128 dB, 1 kHz at Max SPL

SIGNAL-TO-NOISE RATIO

1

81 dB, 1 kHz at 1 Pa*

PHANTOM POWER REQUIREMENTS

48V DC, 4.8 mA typical

SWITCHES

Flat, roll-off; 10 dB pad (nominal)

WEIGHT

(less accessories)

175 g (6.2 oz)

DIMENSIONS

539.0 mm (21.22") long,

21.0 mm (0.83") maximum body

diameter

OUTPUT CONNECTOR

Integral 3-pin XLRM-type

ACCESSORIES FURNISHED

AT8405a stand clamp for

5

/

8

"-27

threaded stands;

5

/

8

"-27 to

3

/

8

"-16

threaded adapter; AT8147

windscreen; two O-rings;

protective carrying case

†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

2

= 10 microbars = 94 dB SPL

1

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

Specifications are subject to change without notice.

LINE + GRADIENT CONDENSER MICROPHONE

200 Hz

5 kHz

1 kHz

8 kHz

SCALE IS 5 DECIBELS PER DIVISION

Polar Pattern

LEGEND

12" or more on axis

LEGEND

Roll-off

Frequency in Hertz

Frequency Response

Response in dB