Audio-Technica Microphone OMNIDIRECTIONAL DYNAMIC User Manual

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of 1
 
200 Hz
1 kHz
5 kHz
8 kHz
LEGEND
same as 1 kHz
Polar Pattern
SCALE IS 5 DECIBELS PER DIVISION
90
60
120
30
150
210
240
270
300
330
180
0
Frequency in Hertz
Response in dB
10 dB
20k
10k
5k
2k
1k
500
200100
50
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
atten
uator such as the A
udio-Technica AT8202 may be required
betw
een the microphone and preamplifier to a
v
oid o
v
er
loading
sensitiv
e 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
Audi
o
-
T
echnica Limited,
Old Lane, Leeds L
S
1
1 8AG England
www.audio-technica.com
P51661-EN ©2004 Audio-Technica U.S., Inc. Printed in Japan
AT804 OMNIDIRECTIONAL DYNAMIC MICROPHONE

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