Audio Technica AT813a Bedienungsanleitung

Frequency in Hertz

Response in dB

10 dB

20k

10k

500

200100

Frequency Response

LEGEND 12" or more on axis

• Ideal for close-up vocals, overheads, piano, and strings

•Cardioid polar pattern reduces pickup of sounds from the sides

and rear, improving isolation of desired sound source

•Proximity effect provides added warmth when used close up

• Large protective screen reduces “popping” and sibilant distortion

•Operates on battery or phantom power

The AT813a requires 9V to 52V DC phantom power or a 1.5V AA

battery for operation. A battery need not be in place for phantom

power operation.

Battery installation: Unscrew the lower section of the microphone

body, just below the nameplate.Insert a fresh 1.5V AA battery

in the handle compartment (“+” end up), then reassemble the

microphone. Alkaline batteries are recommended for longest life.

Remove the battery during long-term storage.

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.

The high sensitivity of the AT813a assures useful output and an

excellent match to most input sources. In some cases, however, an

attenuator such as the Audio-Technica AT8202 may be required

between the microphone and preamplifier to avoid overloading

sensitive input stages.

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.

AT813a SPECIFICATIONS†

ELEMENT Fixed-charge back plate

permanently polarized

condenser

POLAR PATTERN Cardioid

FREQUENCY RESPONSE 30-20,000 Hz

OPEN CIRCUIT SENSITIVITY –44 dB (6.3 mV) /

(Phantom / Battery) –45 dB (5.6 mV) re 1V at 1 Pa*

IMPEDANCE (Phantom / Battery) 200 ohms / 270 ohms

MAXIMUM INPUT SOUND LEVEL 137 dB / 123 dB SPL,

(Phantom / Battery) 1 kHz at 1% T.H.D.

SIGNAL-TO-NOISE RATIO170 dB, 1 kHz at 1 Pa*

DYNAMIC RANGE (typical) 113 dB / 99 dB,

(Phantom / Battery) 1 kHz at Max SPL

PHANTOM POWER 9-52V DC, 2 mA typical

REQUIREMENTS

BATTERY TYPE 1.5V AA/UM3

BATTERY CURRENT / LIFE 0.4 mA / 1200 hours typical

WEIGHT (less accessories) 7.1 oz (200 g)

DIMENSIONS 7.60" (193.0 mm) long,

1.98" (50.3 mm) maximum

diameter

OUTPUT CONNECTOR Integral 3-pin XLRM-type

ACCESSORIES FURNISHED AT8405a stand clamp for 5/8"-27

threaded stands; battery; soft

protective pouch

†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/cm2= 10 microbars = 94 dB SPL

1Typical, A-weighted, using Audio Precision System One.

Specifications are subject to change without notice.

Audio-Technica U.S., Inc., 1221 Commerce Drive, Stow, Ohio 44224

Audio-

Technica Limited, Old Lane, Leeds LS11 8AG England

www.audio-technica.com

AT813a CARDIOID CONDENSER MICROPHONE

200 Hz

1 kHz

5 kHz

8 kHz

LEGEND

Same as 1 kHz

Polar Pattern

SCALE IS 5 DECIBELS PER DIVISION

120

150

210

240

270

300

330

180

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