Audio-Technica BP4071L Manual

Audio-Technica Mikrofon BP4071L

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LINE + GRADIENT CONDENSER MICROPHONE

- Overall length of 539mm with an extremely narrow, highly directional

pickup pattern

- Designed for use in broadcasting, lm/TV production, and theater

sound reinforcement applications

- 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

- Transformerless design for improved pickup of transients

- Switchable 80 Hz high-pass lter & 10 dB pad

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

source such as the Audio-Technica AT8801 single-channel or AT8506

four-channel phantom power supplies.

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 hi-pass filter provides easy switching from a flat

frequency response to a low-end roll-off. The roll-off position reduces

the microphone's sensitivity to popping in close vocal use. It also

reduces the pickup of low-frequency ambient noise (such as trafc,

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 congurations.

The microphone is RoHS compliant–free from all substances

specied in the EU directive on hazardous substances.

Avoid leaving the microphone in the open sun or in areas where

temperatures exceed 43°C for extended periods. Extremely high

humidity should also be avoided.

FORM No. ATGC-L0149-08-E

10 dB

20k10k5k2k1k50020010050

8 kHz

200 Hz

1 kHz

5 kHz

0°

330°

300°

270°

240°

210°

180°

150°

120°

90°

60°

30°

Polar Pattern

Frequency Response

SCALE IS 5 DECIBELS PER DIVISION

LEGEND

Frequency in Hertz

LEGEND 12” or more on axis

Response in dB

same as 1 kHz

Machida • Tokyo • Japan

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

NOISE 13 dB SPL

DYNAMIC RANGE (typical) 128 dB, 1 kHz at Max SPL

SIGNAL-TO-NOISE RATIO 81 dB, 1 kHz at 1 Pa

PHANTOM POWER REQUIRMENTS 48V DC, 4.6 mA typical

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

WEIGHT (less cable and accessories) 175 g

DIMENSIONS 539.0 mm long,

21.0 mm diameter

OUTPUT CONNECTOR Integral 3-pin XLRM-type

ACCESSORIES FURNISHED AT8405a stand clamp for ⅝"-27

threaded stands;

AT8147 windscreen;

two o-rings;

⅝"-27 to ⅜"-16 threaded adapter;

protective carrying case

Roll-off

10 dB

20k10k5k2k1k50020010050

8 kHz

200 Hz

1 kHz

5 kHz

0°

330°

300°

270°

240°

210°

180°

150°

120°

90°

60°

30°

指向特性

频率特性

声压曲线 1刻度5 dB

频率

频率 (赫兹)

电平平直

响应电平 (dB)

FORM No. ATGC-L0149-08-C

超指向性电容话筒

- 全长达539 m m 的极窄角度收音，更高的收音指向性。

- 专为广播、影视制作和电影拍摄的音频收音而设计。

- 直接耦合式平衡输出，高收音灵敏度而不受风声等杂

音影响。

- 无变压器的输出设计，可提供宽程的清晰收音。

- 特殊共鸣管设计，以更窄角度收音。

- 无变压器的输出设计，可提供宽程的清晰收音。

- 设有80 H z 高通滤波和10dB衰减开关。

BP4 071L需要使用4 8V幻象供电工作，可使用专业调音

台上的幻象电源，也可以使用鐵三角的AT 8 8 01单通道

或AT850 6 四通道幻象电源供电器作独立供电。

低阻抗的平衡音频输出，话筒音频信号最终以卡农公头

的2号及3号针脚输出，而1号针脚则为地线(屏蔽)连接。

输出相位将以正相位电平设于 2号针脚上。

为濶免出现相位相互抵消而失真的情况，所有话筒连接

时，接线必需以1-1，

2-2，

3 - 3 型式把针脚连接。

内置高通滤波电路，可轻易由平直的频率响应，开启为

于 8 0 Hz 以下衰减的收音效果，应用高通滤波器可减

低话筒在近距离讲话收音时的喷气声，并可减低收音环

境中低频噪声 (如外间汔车引擎声，空调系统的风声等)，

房间中的回声及机械性的震动声。

BP4 0 71L话同并有10 d B衰减开关，在高声压环境收音

时，减低话筒的灵敏度，避免破声的失真现象出现。

话筒符合 R o H S规格，在构造上不含有欧盟禁用的危害

性物质。

把话筒暴露于高温中可能导致输出电平逐渐及永久性减

弱，应避免将话筒留在日晒的地方或长时间置于温度超

过43° C的地方，而极高湿度也应避免。

与

1 kHz 曲线相同

Machida • Tokyo • Japan

技术指标

收音头直流偏压电容式

指向特性超指向性

频率响应 20-18,000 Hz

高通滤波 80 Hz, 12 dB/octave

开通灵敏度 -29 dB (35.5 mV) 以 1V 于 1 Pa

输出阻抗 50 欧姆

最大承受声压 141 dB 声压, 1 kHz 于 1% T.H.D.

151 dB 声压于 10dB 衰减

噪音 13 dB 声压

动态范围 (典型) 128 dB, 1 kHz

于最高声压

讯噪比 81 dB, 1 kHz 于 1 Pa

幻像供电直流 48V, 耗电 4.6mA 典型

开关平直 / 高通滤波

; 10dB 衰减

重量 175 g

外形尺寸 539.0 mm 长, 21.0 mm 直径

输出连接器内置 XLRM-3针卡农公头

附属品 AT8405a ⅝"-27接头转轴式支架；

AT8147海棉防风罩；

⅝"-27至⅜"-16转接头；

圆型环2个；

保护袋

高通滤波

Produkt Specifikationer

Mærke:	Audio-Technica
Kategori:	Mikrofon
Model:	BP4071L
Type:	Scene/optræden mikrofon
Produktfarve:	Sort
Forbindelsesteknologi:	Ledningsført
Enhedsgrænseflade:	mini XLR (3-pin)
Bæretaske:	Ja
Bæredygtighedscertifikater:	RoHS
Mikrofonindgangsimpedans:	50 ohm (Ω)
Mikrofon frekvens:	20 - 20000 Hz
Mikrofon sensitivitet:	-29 dB
Mikrofon vægt:	136 g
Overholdelse af bæredygtighed:	Ja
Antal produkter inkluderet:	1 stk
Mikrofon dimensioner (DxH):	21 x 395 mm
Mikrofon, signal-til-støjforhold:	81 dB
Mikrofon dynamikområde:	128 dB
Lavskåret filter:	80 Hz