AT857AMa/AT857AMLa SPECIFICATIONS
†
ELEMENT Fixed-charge back plate
permanently polarized condenser
POLAR PATTERN Cardioid (Unidirectional)
FREQUENCY RESPONSE 30-20,000 Hz
LOW-FREQUENCY ROLL-OFF 80 Hz, 18 dB/octave
OPEN CIRCUIT SENSITIVITY PHANTOM –44 dB (6.3 mV) re 1V at 1 Pa*
BATTERY –45 dB (5.6 mV) re 1V at 1 Pa*
IMPEDANCE PHANTOM 200 ohms
BATTERY 270 ohms
MAXIMUM INPUT SOUND LEVEL PHANTOM 135 dB SPL, 1 kHz at 1% T.H.D.
BATTERY 121 dB SPL, 1 kHz at 1% T.H.D.
DYNAMIC RANGE (TYPICAL) PHANTOM 108 dB, 1 kHz at Max SPL
BATTERY 94 dB, 1 kHz at Max SPL
SIGNAL-TO-NOISE RATIO
1
67 dB, 1 kHz at 1 Pa*
SWITCH Off, on-flat, on-roll-off
BATTERY TYPE Use only “leakproof” AA/UM3 1.5V battery
BATTERY CURRENT 0.4 mA typical
BATTERY LIFE 1200 hours (alkaline battery)
PHANTOM POWER REQUIREMENTS 9-52V DC, 2 mA typical
WEIGHT MICROPHONE (AT857AMa) 3.6 oz (103 grams)
(AT857AMLa) 4.6 oz (131 grams)
POWER MODULE 5.2 oz (147 grams)
DIMENSIONS MICROPHONE (AT857AMa) 12.21" (310.2 mm) long above mounting surface
(AT857AMLa) 19.00" (482.5 mm) long above mounting surface
(BOTH) 0.47" (12.0 mm) head diameter
POWER MODULE 3.27" (83.0 mm) H x 2.48" (63.0 mm) W x
0.87" (22.0 mm) D
OUTPUT CONNECTOR (POWER MODULE) Integral 3-pin XLRM-type
CABLE 9.8' (3.0 m) long (permanently attached to
microphone), 0.10" (2.6 mm) diameter,
2-conductor, shielded cable with TA3F output
connector that mates with TB3M jack on
power module
ACCESSORIES FURNISHED AT8102 two-stage foam windscreen;
AT8531 power module; battery;
AT8425
5
/
8
"-27 threaded mounting stud
OPTIONAL INTERCHANGEABLE ELEMENTS AT853H-ELE hypercardioid (100°)
AT853O-ELE omnidirectional (360°)
AT853SC-ELE subcardioid (170°)
†
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
1
Typical, A-weighted, using Audio Precision System One.
Optional Accessories:
• AT8104a metal lockable windscreen.
• AT8117 large foam windscreen.
• AT8314 2-conductor, shielded, vinyl-jacketed,
broadcast-type cable with XLRF-type
connector at microphone end, XLRM-type
connector at equipment end. Available in
10', 20', 25', 30', 50' & 100' lengths.
• AT8416 shock mount.
• CP8201 line matching transformer
(Lo-Z to 50,000 ohms).
• CP8506 four-channel 48V phantom power
supply (AC powered).
• AT8801 single-channel 48V phantom power
supply (AC powered).
AT8531 Power Module
One-Year Limited Warranty
Audio-Technica microphones and accessories purchased in the U.S.A. are warranted for one year from date of purchase by
Audio-Technica U.S., Inc. (A.T.U.S.) to be free of defects in materials and workmanship. In event of such defect, product will
be repaired promptly without charge or, at our option, replaced with a new product of equal or superior value if delivered to
A.T.U.S. or an Authorized Service Center, prepaid, together with the sales slip or other proof of purchase date.
Prior approval from A.T.U.S. is required for return.
This warranty excludes defects due to normal wear, abuse, shipping
damage, or failure to use product in accordance with instructions. This warranty is void in the event of unauthorized repair
or modification.
For return approval and shipping information,
contact the Service Department, Audio-Technica U.S., Inc.,
1221 Commerce Drive, Stow, Ohio 44224.
Except to the extent precluded by applicable state law,
A.T.U.S. will have no liability for any consequential, incidental,
or special damages; any warranty of merchantability or fitness for particular purpose expires when this warranty
expires.
This warranty gives you specific legal rights, and you may have other rights which vary from state to state.
Outside the U.S.A., please contact your local dealer for warranty details.
AT857AMa
Dimensions
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