Audio-Technica BP4071L Microphone User Manual


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• 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
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