Audio Technica OMNIDIRECTIONAL DYNAMIC AT804 Specifications

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 500 200 100 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 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 P51661-EN ©2004 Audio-Technica U.S., Inc. Printed in Japan AT804 OMNIDIRECTIONAL DYNAMIC MICROPHONE