Audio-Technica ATND933aC Datasheet

ATND933aC & ATND933aWC Cardioid Condenser Hanging

Microphones with Dante™ Network Output

enclosed in a rugged housing with a low-reﬂectance black ﬁnish. It is also available with white housing, cable, hanger and windscreen as the ATND933aWC.

Installation and Operation

A uniform 120° angle of acceptance provides well-balanced audio pickup. The microphone should be located forward of the front-most source, above the rear-most source, and “aimed” between them (Fig.1). Increasing the height of the mic above the sources will tend to equalize sound levels between them, but may also increase background/ reverberant sound pickup. When possible, the distance from the mic to the rear-most source should be no more than twice the distance to the front source, to maintain front-to-rear balance (Fig. 1).

Width of pickup is approximately three times the distance to the closest source. If additional mics are needed for wide sources, they should be positioned apart laterally at least three times the distance to the front source, to avoid phase cancellation (Fig. 2).

Network Microphones

Features

• Wall/ceiling plate power module with Dante™ network output permits permanent installation in standard, 2-gang electrical box and direct connection to the network via Ethernet cable

• Uniform cardioid polar pattern with 120° acceptance angle

• Low-proﬁle design with low-reﬂectance ﬁnish for minimum visibility

• Superior o-axis rejection for maximum gain before feedback

• Logic input accepts external switch for connection to the Dante™ network

• UniGuard® RFI-shielding technology oers outstanding rejection of radio frequency interference (RFI)

• UniSteep® ﬁlter provides a steep low-frequency attenuation to minimize pickup of undesired ambient noise

• Available interchangeable elements permit angle of acceptance from 90° to 360°

• Steel hanger positions microphone over choirs, instrumental groups and theater stages

• Available in two colors: black (ATND933aC) and white (ATND933aWC)

Description

The ATND933aC is a wide-range miniature condenser microphone with a cardioid polar pattern. It is designed for quality sound reinforcement, professional recording, television and other demanding sound pickup applications. The combination of small size and excellent response makes the microphone ideal for suspension over choirs, instrumental groups or theater stages.

The microphone is equipped with UniGuard® RFI-shielding technology, which oers outstanding rejection of radio frequency interference (RFI).

The microphone’s cardioid polar pattern provides a 120° angle of acceptance. Additional interchangeable elements with omnidirectional (360°), hypercardioid (100°) and MicroLine® (90°) pickup patterns are available.

The microphone includes a 15.2 m (50') permanently attached miniature cable. Its free end connects to the provided ATND8734a Dante-enabled wall/ceiling plate power module via a special TA3F-type connector designed to optimize RFI immunity. The power module features a removable, circular cover plate that can be painted with commercially available spray paint. The power module includes an RJ-45 output jack for easy connection to the network via CAT5e (or better) cable. Additionally, logic input screw terminals accept an external switch for connection to the Dante™ network.

The power module is equipped with an 80 Hz low-cut UniSteep® ﬁlter, three-position input gain level selector (+30 dB, +40 dB and +50 dB), and red/green LED status indicator, which can all be controlled remotely via third-party software.* Default settings for the power module are as follows: low-cut ﬁlter o, +40 dB input gain, LEDs o.

To orient the microphone in the proper direction, twist the housing slightly in its wire holder. (Clockwise rotation moves the microphone to the right; counterclockwise rotation moves it to the left.)

The provided two-stage foam windscreen simply snaps over the head of the microphone, eectively reducing noise from wind or ventilation air currents.

The power module allows for remote control of a high-pass ﬁlter to provide easy switching from a ﬂat frequency response to a low-end roll-o. The roll-o position reduces the pickup of low-frequency ambient noise (such as trac, air-handling systems, etc.), room reverberation and mechanically coupled vibrations. Mic gain and LED ring color may also be controlled remotely through the power module.

The power module is equipped with logic input screw terminals which can be used to trigger functions on compatible Dante-enabled devices, such as a video camera’s pan/tilt or a rooms lighting preset.

The ATND8734a wall/ceiling plate power module is designed to be mounted in a standard metal U.S. 2-gang electrical box. For safety and best performance, use the electrical box only for the ATND8734a; do not include any AC power conductors.

The power module is powered by network PoE.

Connect the TA3F-type connector on the microphone cable to the TB3M-type connector in the power module plate.

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.

Note: Audio-Technica has developed a special RFI-shielding mechanism, which is an integral part of the connectors in the Engineered Sound® line. If you remove or replace the connector, you may adversely aect the unit’s RFI immunity. Audio-Technica oers a crimp tool (ATCT) and RFI shields that enable you to shorten the cable and correctly reinstall the connector while maintaining the highest level of RFI immunity.

LES

S T

AN 2

TIMES

“

120° ANGLE OF ACCEPTANCE

“

”

120°120°

MIC

DISTANCE “X”

3 TIMES

IC B

Figure 1 Figure 2

The microphone comes equipped with a vinyl-coated steel hanger for positioning over a choir/orchestra/stage, and a two-stage foam windscreen. The microphone is

ATND933aC & ATND933aWC

12" or more on axis

LEGEND

Frequency in Hertz

Response in dB

10 dB

100

200

10k

500

20k

Roll-off

0.46"

11.6 mm

50'

15.2 m

0.13"

3.2 mm

1.08"

27.5 mm

0.48"

12.3 mm

0.33"

8.4 mm

3.16"

80.3 mm

1.85"

47.0 mm

1.45"

36.8 mm

0.46"

11.6 mm

50'

15.2 m

0.13"

3.2 mm

Architect’s and Engineer’s Speciﬁcations

The microphone shall be a ﬁxed-charge condenser designed for permanent installation or portable applications. It shall have a cardioid polar pattern with a uniform 120° angle of acceptance and a frequency response of 30 Hz to 20,000 Hz. It shall be capable of accepting optional interchangeable elements for additional polar patterns. It shall oer outstanding rejection of radio frequency interference (RFI).

The microphone shall have a permanently attached 15.2 m (50') miniature cable terminating in a special TA3F-type output connector designed to optimize RFI immunity. The output connector shall connect to a TB3M-type jack on the included power module. The output connection on the power module shall be an RJ-45 terminal using standard network protocol. Logic input screw terminals shall be provided to accept commercially available external switches. The power module shall be capable of driving a Dante audio ﬂow. The plate power module shall be designed to mount in a standard 2-gang metal electrical box for ceiling or wall mounting. The power module shall contain an 80 Hz “low cut” switch to tailor the low-frequency response and minimize pickup of unwanted sounds; it shall be selectable remotely via third-party software.* There shall also be three gain levels (+30 dB, +40 dB, and +50 dB), selectable remotely via third-party software. The power module shall include a red/green LED ring, controllable via third-party software, and a removable, circular face plate that can be painted with commercially available spray paint.

An adjustable steel wire hanger shall be provided for suspended installations. The steel wire hanger shall attach to the microphone body and allow for the positioning of the microphone without the need for tools. A two-stage foam windscreen shall also be included.

The microphone shall be a hanging design, with an overall length of 27.5 mm (1.08") and a head diameter of 8.4 mm (0.33"). Weight shall be 5.5 grams (0.2 oz) without cable. The microphone, cable and steel hanger shall be black [white].

The Audio-Technica ATND933aC [ATND933aWC] is speciﬁed.

* For a list of compatible third-party software consult the “About Network Audio” page at Audio-Technica.com.

50'

15.2 m

0.13"

3.2 mm

3.16"

80.3 mm

12.3 mm

0.48"

0.33"

8.4 mm

1.08"

27.5 mm

1.45"

36.8 mm

0.46"

11.6 mm

1.85"

47.0 mm

Speciﬁcations

Element

Fixed-charge back plate, permanently polarized condenser

Polar pattern

Frequency response Low frequency roll-o Maximum input levels

Cardioid 30-20,000 Hz 80 Hz, 18 dB/octave

-15 dBu @ +30 dB gain

-25 dBu @ +40 dB gain

-35 dBu @ +50 dB gain

Signal-to-noise ratio

Weight

68 dB, 1 kHz at 1 Pa Microphone: 5.5 g (0.2 oz) Power module: 330 g (11.6 oz)

Dimensions

Microphone: 27.5 mm (1.08") long,

8.4 mm (0.33") head diameter Power module: 148.0 mm (5.83") diameter x 47.0 mm (1.85") depth

Output connector

Dante network

Power module: RJ-45 Physical level: standard Ethernet Connector: single RJ45 Cable quality: Shielded CAT5 or CAT6 recommended Transmission speed: 100 Mbps

Optional interchangeable elements

ESE-O omnidirectional (360°) ESE-H hypercardioid (100°) ESE-ML MicroLine

Audio-Technica case style

M25

Accessories furnished

ATND933aC

ATND8734a wall/ceiling plate power module with Dante AT8109 two-stage foam windscreen; AT8452 steel hanger

ATND933aWC

ATND8734a wall/ceiling plate power module with Dante output; AT8109(WH) two-stage foam windscreen; AT8452(WH) steel hanger

In the interest of standards development, A.T.U.S. oers full details

1 Pascal = 10 dynes/cm

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

on its test methods to other industry

professionals on request.

= 10 microbars = 94 dB SPL

Speciﬁcations are subject to change without notice.

frequency response: 30– 20,000 Hz polar pattern

330˚

300˚

270˚

Response in dB

240˚

SCALE IS 5 DECIBELS PER DIVISION

210˚

LEGEND

200

100

12" or more on axis Roll-off

500

Frequency in Hertz

10 dB

10k

20k

(90°)

™

0˚

30˚

150˚

180˚

network output;

™

network

60˚

90˚

120˚

LEGEND

200 Hz

1 kHz 5 kHz 8 kHz

5.83"

148.0 mm

Audio-Technica Corporation