• Unique side-address stick design maximizes placement options
with minimal obstructions
• Uncompromising sound quality for overheads, percussion,
acoustic guitar, strings and other acoustic instruments
• Integral 80 Hz HPF switch and 10 dB pad
• Durable performance for professional applications
• Cardioid polar pattern reduces pickup of sounds from the sides
and rear, improving isolation of desired sound source
• Rugged, all-metal design and construction for years of trouble-free
use
• Includes isolation clamp for shock protection, secure mounting and
easy positioning
The ATM450 is intended for use in professional applications where
remote power is available. It requires 11V to 52V DC phantom
power, which may be provided by a mixer or console, or by a
separate, in-line source such as the Audio-Technica AT8801 single-
channel or CP8506 four-channel phantom power supplies.
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.
An integral 80 Hz hi-pass filter provides easy switching from a flat
frequency response to a low-end roll-off. The roll-off position reduces
the pickup of low-frequency ambient noise (such as traffic, air-
handling systems, etc.), room reverberation and mechanically-
coupled vibrations.
The ATM450 is also equipped with a switchable 10 dB pad that
lowers the microphone's sensitivity, thus providing higher SPL
capability for flexible use with a wide range of performers and
system configurations.
The ATM450 includes an AT8471 isolation clamp to provide secure
mounting, versatile positioning and effective dampening of unwanted
mechanical noise.
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.
Audio-Technica U.S., Inc., 1221 Commerce Drive, Stow, Ohio 44224
Audio-Technica Limited, Old Lane, Leeds LS11 8AG England
www.audio-technica.com
P51803 ©2006 Audio-Technica U.S., Inc. Printed in China
ATM450
ATM450 SPECIFICATIONS†
ELEMENT Fixed-charge back plate
permanently polarized condenser
POLAR PATTERN Cardioid
FREQUENCY RESPONSE 40-20,000 Hz
LOW FREQUENCY ROLL-OFF 80 Hz, 18 dB/octave
OPEN CIRCUIT SENSITIVITY –41 dB (8.9 mV) re 1V at 1 Pa*
IMPEDANCE 200 ohms
MAXIMUM INPUT SOUND LEVEL 152 dB SPL, 1 kHz at 1% T.H.D.
DYNAMIC RANGE (typical) 127 dB, 1 kHz at Max SPL
SIGNAL-TO-NOISE RATIO169 dB, 1 kHz at 1 Pa*
PHANTOM POWER REQUIREMENTS 11-52V DC, 3.5 mA typical
SWITCHES Flat, roll-off; 10 dB pad
WEIGHT 98 g (3.5 oz)
DIMENSIONS 126.9 mm (5.00") long,
21.0 mm (0.83") diameter
OUTPUT CONNECTOR Integral 3-pin XLRM-type
ACCESSORIES FURNISHED AT8471 isolation clamp for 5/8"-27
threaded stands; 5/8"-27 to 3/8"-16
threaded adapter; windscreen; 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.
CARDIOID CONDENSER
INSTRUMENT MICROPHONE
8 kHz
Polar Pattern
SCALE IS 5 DECIBELS PER DIVISION
LEGEND
200 Hz
1 kHz
5 kHz
Frequency in Hertz
LEGEND 12" or more on axis
Roll-off
Frequency Response
Response in dB
