Audio-Technica ATM350 Datasheet

ATM350

Cardioid Condenser Clip-on Instrument Microphone

Features

• Attaches to brass, reeds, piano, acoustic bass, snare, toms and violin

• Crisp, clear, well-balanced response, even at high SPLs

• Low-prole design for minimum visibility

• Cardioid polar pattern reduces pickup of sounds from the sides and rear, improving isolation of desired sound source

• UniMount® clip permits accurate positioning, provides shock resistance and protects element

• Unique violin mount permits unobtrusive placement of microphone between the instrument's bridge and tailpiece

• Switchable 80 Hz high-pass lter minimizes pickup of undesired low-frequency sounds

• Interchangeable elements available for hypercardioid and omnidirectional polar patterns

• Also available in a wireless model, ATM350cW

ATM350 Description

The ATM350 is a xed-charge clip-on condenser microphone with a cardioid polar pattern. It is designed for use in professional live-sound and studio applications.

When used with the included instrument mount, it provides accurate, consistent pickup of trumpet and saxophone and many other musical instruments. When used with the included violin mount, it provides outstanding pickup of violin and other stringed instruments.

The microphone requires 11V to 52V phantom power for operation.

artist series live sound microphones

ATM350cW Description

The microphone is also available in a wireless model, the ATM350cW. The ATM350cW features a 1.4 m (55") miniature cable terminated with a locking 4-pin connector for use with Audio-Technica UniPak® bodypack transmitters. No power module is included (or required) with the ATM350cW. The ATM350cW dimensions, polar pattern and included instrument mount and violin mount are identical to those of the ATM350.

Operation and Maintenance

The ATM350 requires 11V to 52V phantom power for operation.

Output 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 high-pass lter provides easy switching from a at frequency response to a low-end roll-off. The roll-off position reduces the pickup of low-frequency ambient noise (such as trafc, air-handling systems, etc.), room reverberation and mechanically coupled vibrations. To engage the high-pass lter, slide the switch toward the “bent” line.

The included UniMount® instrument mount entirely surrounds the microphone with foam to isolate the microphone from noise transmitted from the instrument, shield the element against accidental damage, and provide an efcient wind screen. The exible arm permits aiming the microphone in any direction, while a cable strain relief reduces cable-transmitted noise and cable damage. The rubber grip spring clamp securely holds the microphone to the instrument without marring the surface.

To use the included violin mount, place the microphone in the violin mount’s elastic mic holder. Open the hook & loop fastener; pass the hook side of the open fastener beneath the strings between the bridge and the tailpiece. Close the fastener ap around the strings. The microphone should be on top, with the element facing the bridge (away from the tailpiece).

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.

The cardioid polar pattern of the microphone is more sensitive to sound originating directly in front of the element, making it useful for controlling feedback and reducing pickup of unwanted sounds.

The microphone includes a 4 m (13.1') permanently attached miniature cable. Its free end connects to the provided AT8542 power module via a TA3F-type connector. The output of the power module is a 3-pin XLRMtype connector.

A switch in the power module permits choice of at response or lowfrequency roll-off (via integral 80 Hz high-pass lter) to help control undesired ambient noise.

The microphone is enclosed in a rugged housing with a low-reectance black nish. A power module, an instrument mount, a violin mount and a soft protective pouch are included.

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Specications

Element

Polar pattern

Frequency response

Low frequency roll-off

Open circuit sensitivity

Impedance

Maximum input sound level

Dynamic range (typical)

Signal-to-noise ratio1

Phantom power requirements

Switch Weight

Dimensions

Output connector

Cable(s)

Optional interchangeable elements

Audio-Technica case style

Accessories furnished

In the interest of standards development, A.T.U.S.

offers full details on its test methods to other industry

1 Pascal = 10 dynes/cm

Typical, A-weighted, using Audio Precision System One.

Specications are subject to change without notice.

professionals on request.

= 10 microbars = 94 dB SPL

ATM350

Fixed-charge back plate, permanently polarized condenser Cardioid 40-20,000 Hz 80 Hz, 12 dB/octave –49 dB (3.5 mV) re 1V at 1 Pa 50 ohms 149 dB SPL, 1 kHz at 1% T.H.D. 122 dB, 1 kHz at Max SPL 67 dB, 1 kHz at 1 Pa 11-52V DC, 3.5 mA typical Flat, roll-off Microphone: 14.5 g (0.5 oz) Power module: 81.2 g (2.9 oz) Microphone: 37.8 mm (1.49") long,

12.2 mm (0.48") diameter Power module: 92.9 mm (3.66") long,

18.9 mm (0.74") diameter Power module: Integral 3-pin XLRM-type

4.0 m (13.1') long (permanently attached to microphone), 3.2 mm (0.13") diameter, 2-conductor shielded cable with TA3F-type connector UE-O omnidirectional (360°) UE-H hypercardioid (100°) M36 AT8542 power module; AT8418 UniMount® microphone instrument mount; AT8468 violin mount; soft protective pouch

frequency response: 40–20,000 Hz

10 dB

100

12" or more on axis Roll-off

330˚

200

Frequency in Hertz

0˚

180˚

500

30˚

150˚

60˚

120˚

10k

90˚

LEGEND

200 Hz

1 kHz 5 kHz 8 kHz

LEGEND

polar pattern

300˚

270˚

240˚

210˚

SCALE IS 5 DECIBELS PER DIVISION

Response in dB

20k