Audio-Technica AT4049b Manual

Audio-Technica Mikrofon AT4049b

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OMNIDIRECTIONAL CONDENSER MICROPHONE

- Specially engineered to meet the most critical acoustic requirements

of professional recording, broadcast and sound reinforcement

- Direct-coupled, balanced output results in a clean signal even under

high-output conditions

- Transformerless circuitry virtually eliminates low-frequency distortion

and provides superior correlation of high-speed transients

- Switchable 80 Hz hi-pass lter and 10 dB pad

- Rugged turned-brass microphone housing for enduring

dependability

- State-of-the-art design and manufacturing techniques ensure

compliance with A-T’s stringent consistency and reliability standards

The AT4049b 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 high-pass position

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

It also reduces the pickup of low-frequency ambient noise (such

as traffic, air-handling systems, etc.), room reverberation and

mechanically coupled vibrations.

The AT4049b consists of two modular subassemblies: an

AT4900b-48 body and an AT4049b-EL head capsule (both available

separately). Additional interchangeable capsules are available in

cardioid (AT4051b-EL) and hypercardioid (AT4053b-EL).

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-L0156-09-E

Machida • Tokyo • Japan

SPECIFICATIONS

ELEMENT Externally polarized (DC bias)

capacitor

POLAR PATTERN Omnidirectional

FREQUENCY RESPONSE 20-20,000 Hz

OPEN CIRCUIT SENSITIVITY -34 dB (19.9 mV) re 1V at 1 Pa

IMPEDANCE 50 ohms

MAXIMUM INPUT SOUND LEVEL 146 dB SPL, 1 kHz at 1% T.H.D.;

155 dB SPL, with 10 dB pad (nominal)

NOISE 16 dB SPL

DYNAMIC RANGE (typical) 129 dB, 1 kHz at Max SPL

SIGNAL-TO-NOISE RATIO 78 dB, 1 kHz at 1Pa

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

PHANTOM POWER REQUIREMENTS 48V DC, 4.8 mA typical

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

WEIGHT (less accessories) 130 g

DIMENSIONS 155.0 mm - long,

21.0 mm - maximum body diameter

OUTPUT CONNECTOR Integral 3-pin XLRM-type

ACCESSORIES FURNISHED AT8405a stand clamp for ⅝”-27

threaded stand; windscreen;

protective carrying case

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

Optional Accessories:

AT4051b-EL cardioid microphone capsule.

AT4053b-EL hypercardioid microphone

capsule.

AT8506 four-channel 48V phantom power

supply (AC powered).

AT8801/EU single-channel 48V phantom

power supply (AC powered).

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-L0156-09-C

Machida • Tokyo • Japan

全方向指向性电容话筒

- 特别按专业录音、广播和增强音色的重要要求而设计。

- 直接偶合式平衡输出，在高输出情况下仍有清色的音色

表现。

- 无变压器输出电路，可减少低频失真和提高瞬间响应的清晰

度。

- 设有80Hz高通滤波及10dB衰减开关。

- 经消光加工铜制外壳，结实而具耐久性。

- 以鐵三角公司先进的电子技术和工艺水平制造，保持一

定的严密标准和可靠性。

AT4049b 48V需要使用幻象供电工作，可使用专业调音台上

的幻象电源，也可以使用三角的鐵 AT8801 AT8506单通道或

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

80Hz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。

AT4049b AT4049b-EL 全方向指向话筒以收音头及

AT4900b-48 筒身组合。可自由转换收音头：AT4051b-

EL ( 心形指向性) 或 AT4053b-EL (超心形指向性)。

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。

技术指标

收音头直流偏压型电容式

指向特性全方向指向性

频率响应 20-20,000 Hz

开通灵敏度 -34 dB (19.9 mV) 以 1V 于 1 Pa

输出阻抗 50 欧姆

最大承受声压 146 dB 声压, 1 kHz 于 1% T.H.D.;

155 dB 声压于 10dB 衰减

噪声 16 dB 声压

动态范围 (典型) 129 dB, 1 kHz 于最高声压

讯噪比 78 dB, 1 kHz 于 1Pa

高通滤波 80 Hz, 12 dB/octave

幻象供电直流 48V，耗电 4.8 mA 典型

开关平直 / 高通滤波；10dB衰减

重量 130 克

外形尺寸 155.0 mm - 长度

21.0 mm - 最大直径

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，

海棉防风罩，保護袋。

选择配件 :

AT4051b-EL 心形向性收音头。

AT4053b-EL 超心形向性收音头。

AT8506 四通通48V幻象供电器 (

交流供

电)。

AT8801/EU 单通道48V幻象供电器 (交

流供电 )。

高通滤波

Produkt Specifikationer

Mærke:	Audio-Technica
Kategori:	Mikrofon
Model:	AT4049b

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