Audio-Technica BP4025 Manual

Audio-Technica Mikrofon BP4025

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X/Y STEREO FIELD RECORDING MICROPHONE

- Designed for broadcast and professional recording, and eld

use

- Unique coincident capsule conguration produces accurate

stereo image in smaller housing

- Large-diaphragm capsules for pristine sound quality and

exceptionally low noise

- Compact, lightweight design is ideal for camera-mount use

- Excellent channel separation

- Integral 80 Hz HPF switch and 10 dB pad

The BP4025 is intended for use in professional applications

where remote power is available. It requires 11V to 52V DC

phantom power, which may be provided by an audio mixer, or by

a separate, in-line source such as the Audio-Technica AT8801

single-channel or AT8506 four-channel phantom power supplies.

Output for each stereo channel is low impedance (Lo-Z)

balanced. The balanced signals appear across Pins 2 and 3

for the left channel, Pins 4 and 5 for the right channel. Pin 1 is

ground (shield) for both channels. Output is “Pins 2 and 4 hot”

- positive acoustic pressure produces positive voltage at Pins 2

and 4.

Locating the BP4025 nearer the sound source enhances the

width of the stereo image, while decreasing room ambience.

Conversely, as the mic position moves away from the sound

source, a narrower left/right stereo image results and more of the

“room sound” is noted.

An integral 80 Hz high-pass lter provides easy switching from a

at 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 BP4025 is also equipped with a switchable 10 dB pad that

lowers the microphone's sensitivity, thus providing higher SPL

capability for exible 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-L0140-08-E

10 dB

20k10k5k2k1k50020010050

Frequency Response

Frequency in Hertz

LEGEND 12” or more on axis

Response in dB

Machida • Tokyo • Japan

SPECIFICATIONS

ELEMENT Fixed-charge back plate

permanently polarized condenser

CHANNEL BALANCE <2.5 dB

POLAR PATTERN X/Y Stereo

FREQUENCY RESPONSE 20-17,000 Hz

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

OPEN CIRCUIT SENSITIVITY -32 dB (25.1 mV) re 1V at 1 Pa

IMPEDANCE 170 ohms

MAXIMUM INPUT SOUND LEVEL 145 dB SPL, 1 kHz at 1% T.H.D.;

155 dB SPL, with 10 dB pad

DYNAMIC RANGE (typical) 131 dB, 1 kHz at Max SPL

SIGNAL-TO-NOISE RATIO 80 dB, 1 kHz at 1 Pa

PHANTOM POWER REQUIRMENTS 11 - 52V DC, 7 mA (both channels)

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

WEIGHT (less cable and accessories) 269 g

DIMENSIONS 186.0 mm long,

47.6 mm head diameter,

21.0 mm maximum body diameter

OUTPUT CONNECTOR Integral 5-pin XLRM-type

CABLES 5.0m long, 8 conductor, shielded,

viny l-jac keted s tereo c able wi th

5- pin XL RF-ty pe c on nec tor at

mi cropho ne end a nd two 3- pi n

XLRM-type connectors at output

end

ACCESSORIES FURNISHED AT8405a sta nd clamp for ⅝"-27

threaded stands; windscreen; soft

protective pouch

Roll-off

200 Hz

0°

330°

300°

270°

240°

210°

180°

150°

120°

90°

60°

30°

200 Hz

Polar Pattern

SCALE IS 5 DECIBELS PER DIVISION

LEGEND

LEFT RIGHT

1 kHz

0°

330°

300°

270°

240°

210°

180°

150°

120°

90°

60°

30°

1 kHz

Polar Pattern

SCALE IS 5 DECIBELS PER DIVISION

LEGEND

LEFT RIGHT

8 kHz

0°

330°

300°

270°

240°

210°

180°

150°

120°

90°

60°

30°

8 kHz

Polar Pattern

SCALE IS 5 DECIBELS PER DIVISION

LEGEND

LEFT RIGHT

10 dB

20k10k5k2k1k50020010050

频率特性

频率 (

赫兹)

电平平直

响应电平 (dB)

FORM No. ATGC-L0140-08-C

X/Y立体声现场收音话筒

- 专为专业录音和广播采访的现场收音而设计。

- 独特的配对式收音头，设置于细小的头罩内，提

供精确的立体声收音性能。

- 大型收音膜片，可提供清澈的音色和特低的噪

音。

- 小型、轻量的设计，可夹持于摄像机上使用。

- 优良的通道分离效果。

- 设有 80Hz高通滤波和10dB衰减开关。

BP4025 11V 52V应用于专业收音工作，要提供需至

幻象供电工作，，可使用调音台上的幻象电源，也

可以使用鐵三角的AT8801 AT8506单通道或四通道

幻象电源供电器作独立供电。

话筒的每通道输出端为低阻抗平衡输出，话筒音频

信号最终以卡农公头的2号及 3号针脚作左通道输

出， 4号及5号针脚作右通道输出，而1号针脚则为

左右通道地线 (屏蔽 )连接输出相位将以正相位电。

平设于2号和4号针脚上。

请把话筒放置于接近音源的位置，以减少B P 4 0 2 5

回音混响和提高立体声收音效果。远离音源时会收

窄立体声音像和增加“房问回声”混响。

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 H z 以下衰减的收音效果，应用高通滤波

器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。

BP4025 10dB话同并有衰减开关，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。 Machida • Tokyo • Japan

技术指标

收音头固定充电背板，

静电型电容式

通道平衡 <2.5 dB

指向特性 X/Y 立体声

频率响应 20-17,000 Hz

高通滤波 80 Hz, 12 dB/octave

开通灵敏度 -32 dB (25.1 mV) 以 1V 于 1 Pa

输出阻抗 170 欧姆

最大承受声压 145 dB 声压, 1 kHz 于 1% T.H.D. ;

155 dB 声压于 10dB 衰减

动态范围 (典型) 131 dB, 1 kHz

于最高声压

讯噪比 80 dB, 1 kHz 于 1 Pa

幻像供电直流 11 - 52V, 耗电 7mA 典型每通道

开关平直 / 高通滤波

; 10dB 衰减

重量 269 g

外形尺寸 186.0 mm 长,

47.6 mm 头罩直径

21.0 mm 机身最大直径

输出连接器内置 XLRM-5针卡农公头

连线平衡接线： 5.0 m 长，

8芯线屏蔽式

聚乙烯护套立体声电缆带 5针卡农母

头连接话筒，及两路3针卡农公头于

输出端。

附属品 AT8405a ⅝"-27接头转轴式支架；防

风罩；电池；保护软袋

高通滤波

200 Hz

0°

330°

300°

270°

240°

210°

180°

150°

120°

90°

60°

30°

200 Hz

指向特性

声压曲线1刻度

5 dB

频率

左收音头右收音头

8 kHz

0°

330°

300°

270°

240°

210°

180°

150°

120°

90°

60°

30°

8 kHz

指向特性

声压曲线 1刻度

5 dB

频率

左收音头右收音头

1 kHz

0°

330°

300°

270°

240°

210°

180°

150°

120°

90°

60°

30°

1 kHz

指向特性

声压曲线1刻度

5 dB

频率

左收音头右收音头

Produkt Specifikationer

Mærke:	Audio-Technica
Kategori:	Mikrofon
Model:	BP4025
Type:	Scene/optræden mikrofon
Bredde:	47.6 mm
Dybde:	47.6 mm
Højde:	186 mm
Produktfarve:	Sort
Forbindelsesteknologi:	Ledningsført
Kabellængde:	5 m
Diameter:	21 mm
Enhedsgrænseflade:	Mini XLR (5-pin)
Bæretaske:	Ja
Mikrofonindgangsimpedans:	170 ohm (Ω)
Mikrofon frekvens:	20 - 17000 Hz
Mikrofon sensitivitet:	-32 dB
Mikrofon vægt:	269 g
klirfaktor (THD):	1 %
Anbefalet køn:	Ethvert køn
Antal produkter inkluderet:	1 stk
Mikrofon, signal-til-støjforhold:	80 dB
Mikrofon dynamikområde:	131 dB
Maksimalt lydtrykniveau (1kHz):	145 dB
Lavskåret filter:	80 Hz