Audio Technica OMNIDIRECTIONAL DYNAMIC AT804 Manuel utilisateur

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

Frequency in Hertz

Response in dB

10 dB

20k

10k

500

200100

Frequency Response

LEGEND

12" or more on axis

• Ideal for interviews, sportscasting and as the “mono” mic when

used in conjunction with a stereo microphone

•Omnidirectional polar pattern provides natural reproduction of

surrounding ambience

• Rugged housing with hardened-steel grille stands up to field use

• Internal shock mounting minimizes handling and cable noise

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. For a high-impedance (Hi-Z)

mic input, connect a Lo-Z balanced cable to a Hi-Z matching

transformer (A-T CP8201 or equal) at the equipment input.

Plug Type Ground Audio “+” Audio “-”

XLR Pin 1 Pin 2 Pin 3

1/4" “TRS” Sleeve Tip Ring

1/4" Sleeve Tip Sleeve

The high sensitivity of the AT804 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.

Take care to keep foreign particles from entering the windscreen.

An accumulation of iron or steel filings on the diaphragm, and/or

foreign material in the windscreen’s mesh surface, can degrade

performance.

AT804 SPECIFICATIONS†

ELEMENT Dynamic

POLAR PATTERN Omnidirectional

FREQUENCY RESPONSE 50-15,000 Hz

OPEN CIRCUIT SENSITIVITY –49 dB (3.5 mV) re 1V at 1 Pa*

IMPEDANCE 600 ohms

WEIGHT (less accessories) 7.5 oz (213 g)

DIMENSIONS 5.94" (151.0 mm) long,

1.42" (36.0 mm) head diameter

OUTPUT CONNECTOR Integral 3-pin XLRM-type

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

threaded stands; 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/cm 2= 10 microbars = 94 dB SPL

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

AT804 OMNIDIRECTIONAL DYNAMIC MICROPHONE

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