Audio-Technica PRO 70 Datasheet

PRO 70

Cardioid Condenser Lavalier Microphone

Features

• Clip-on lavalier mic provides articulate, full-sounding voice pickup

• Also excels as an instrument mic, especially for pickup of acoustic guitar with included AT8444 instrument adapter

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

• Offers the convenience of battery or phantom power operation

• Rugged design and construction for reliable performance

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

Description

The PRO70 is a miniature clip-on/lavalier condenser microphone with a cardioid polar pattern. It is designed for quality sound reinforcement, professional recording, television and other demanding sound pickup applications.

The microphone is intended to be worn on the clothing or used as an instrument mic for excellent yet unobtrusive sound pickup. The widerange capability of the microphone ensures clean, accurate reproduction with high intelligibility for speakers and presenters as well as for instrument pickup. Its small size makes it ideal for use in applications where minimum visibility is required.

pro series

To install the battery, remove the cap from the top of the power module. Insert a fresh 1.5V AA battery (“+” end toward the cap release button), then reassemble the power module. For longest battery life, the switch should remain off except when the microphone is in use. Alkaline batteries are recommended for longest life. Remove the battery during long-term storage.

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.

A 3-position switch in the power module permits choice of off, on/at response, or on/low-roll-off (via integral 80 Hz high-pass lter). The roll-off position reduces the microphones sensitivity to popping in close vocal use. It also 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 lter, slide the switch toward the “bent” line. To turn the microphone on without engaging the lter, slide the switch toward the at line.

For use as a lavalier, attach the microphone about six inches below the chin. Anticipate movements that may cause the microphone to rub against or be covered by clothing, and position the microphone to avoid it.

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.

Architect’s and Engineer’s Specications

The microphone shall be a xed charge condenser. It shall have a cardioid polar pattern and a frequency response of 100 Hz to 14,000 Hz. The microphone shall operate from an external 11V to 52V DC phantom power source or, alternatively, from a 1.5V AA/UM3 battery. It shall be capable of handling sound input levels up to 123 dB (phantom and battery) with a dynamic range of 96 dB (phantom and battery). Nominal open-circuit output voltage shall be 5.6 mV (phantom) and (battery) at 1 V, 1 Pascal. Output shall be low impedance balanced (200 ohms—phantom and battery).

The microphone requires 11V to 52V phantom power or a 1.5V AA battery for operation. A battery need not be in place for phantom power operation.

The microphone’s cardioid polar pattern provides a 120° angle of acceptance.

The microphone includes a 1.8 m (6') permanently attached miniature cable. Its free end connects to the provided AT8531 power module via a TA3F-type connector. The output of the power module is a 3-pin XLRMtype connector.

A 3-position switch in the power module permits choice of off, on/at response or on/low-roll-off (via integral 80 Hz high-pass lter). The roll-off position reduces the pickup of low-frequency ambient noise.

The microphone comes equipped with a power module, a clothing clip, an instrument adapter, a windscreen, a battery and a soft protective pouch.

Operation and Maintenance

The PRO70 requires 11V to 52V phantom power or a 1.5V AA battery for operation. A battery need not be in place for phantom power operation.

The microphone shall have a 1.8 m (6') permanently attached miniature cable connected to the power module. The power module shall house the battery, and shall contain a switch that permits choice of off, on/at response or on/low-roll-off (80 Hz). The output of the power module shall be a 3-pin XLRM-type connector.

The microphone shall be 25.0 mm (0.98") long and have a diameter of

10.2 mm (0.40"). Weight shall be 8 grams (0.3 oz). The microphone shall include a power module, a clothing clip, a windscreen, a battery, an instrument adapter and a protective carrying case. Finish shall be lowreectance black.

The Audio-Technica PRO70 is specied.

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 ratio

Phantom power requirements

Battery type

Battery current / life

Switch Weight

Dimensions

Output connector

Cable

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

PRO 70

Fixed-charge back plate, permanently polarized condenser Cardioid 100-14,000 Hz 80 Hz, 12 dB/octave Phantom: –45 dB (5.6 mV) re 1V at 1 Pa Battery: –45 dB (5.6 mV) re 1V at 1 Pa Phantom: 200 ohms Battery: 200 ohms Phantom: 123 dB SPL, 1 kHz at 1% T.H.D. Battery: 123 dB SPL, 1 kHz at 1% T.H.D. Phantom: 96 dB, 1 kHz at Max SPL Battery: 96 dB, 1 kHz at Max SPL

67 dB, 1 kHz at 1 Pa 11-52V DC, 2 mA typical

1.5V AA/UM3

0.4 mA / 1200 hours typical (alkaline) Off, on-at, on-roll-off Microphone: 0.3 oz (8 g) Power module: 4.7 oz (134 g) Microphone: 25.0 mm (0.98") long,

10.2 mm (0.40") diameter Power module: 83.0 mm (3.27") H x

63.0 mm (2.48") W x 22.0 mm (0.87") D Power module: Integral 3-pin XLRM-type Integral 6' (1.8 m), permanently attached between microphone and power module M1 AT8411 clothing clip; AT8444 instrument adapter; power module; windscreen; battery; soft protective pouch

frequency response: 100–14,000 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