Audio-Technica BP4071L Dépliant

•  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.

Output  from  the  microphone’s  XLRM-type  connector  is  low

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

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)

13 dB SPL

DYNAMIC RANGE (typical)

128 dB, 1 kHz at Max SPL

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)

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.

200 Hz

5 kHz

1 kHz

8 kHz

SCALE IS 5 DECIBELS PER DIVISION

LEGEND

12" or more on axis

LEGEND

Roll-off

Frequency in Hertz

Response in dB