Audio-Technica ATM450 - Manual

• 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.

O u t p u t f r o m t h e m i c r o p h o n e ' s X L R M - t y p e c o n n e c t o r i s l o w
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 perfor mers 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
t e m p e r a t u r e s e x c e e d 1 1 0 ° F ( 4 3 ° C ) f o r e x t e n d e d p e r i o d s .
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 RATIO

1

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/cm

2

= 10 microbars = 94 dB SPL

1

Typical, 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