Audio-Technica AT4051b Bedienungsanleitung

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CARDIOID 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 AT4051b 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 CP8506 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 trafc, air-handling

systems, etc.), room reverberation and mechanically coupled vibrations.

The AT4051b consists of two modular subassemblies: an AT4900b-48

body and an AT4051b-EL head capsule (both available separately).

Additional interchangeable capsules are available in omnidirectional

(AT4049b-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-L0160-09-E

Machida • Tokyo • Japan

SPECIFICATIONS

ELEMENTExternally polarized (DC bias)

capacitor

POLAR PATTERNCardioid

FREQUENCY RESPONSE20-20,000 Hz

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

IMPEDANCE 50 ohms

MAXIMUM INPUT SOUND LEVEL145 dB SPL, 1 kHz at 1% T.H.D.

155 dB SPL, with 10 dB pad (nominal)

NOISE16 dB SPL

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

SIGNAL-TO-NOISE RATIO78 dB, 1 kHz at 1Pa

LOW FREQUENCY ROLL-OFF80 Hz, 12 dB/octave

PHANTOM POWER REQUIREMENTS48V DC, 4.8 mA typical

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

WEIGHT (less accessories)126 g

DIMENSIONS 155.0 mm - long,

21.0 mm - body diameter

OUTPUT CONNECTORIntegral 3-pin XLRM-type

ACCESSORIES FURNISHEDAT8405a snap-in 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:

AT4049b-EL omnidirectional microphone

capsule.

AT4053b-EL hypercardioid microphone

capsule.

AT8106 metal-frame pop lter.

AT8114 foam windscreen for AT8106 pop

lter.

AT8506 four-channel 48V phantom power

supply (AC powered).

AT8801/EU single-channel 48V phantom

power supply (AC powered).

Roll-off

Produktspezifikationen