Audio-Technica specifications ATM450 Cardioid Condenser Instrument Microphone

ATM450 CARDIOID CONDENSER INSTRUMENT MICROPHONE

•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.

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 RATIO1	69 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.

Polar Pattern Frequency Response

Response in dB

Frequency in Hertz

LEGEND	12" or more on axis
SCALE IS 5 DECIBELS PER DIVISION	Roll-off

LEGEND

200Hz 1 kHz 5 kHz 8 kHz

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