Audio-Technica U841R Datasheet

12" or more on axis

LEGEND

Frequency in Hertz

Response in dB

10 dB

100

200

10k

500

20k

Roll-off

U841R Omnidirectional Condenser Boundary Microphone

Note: Audio-Technica has developed a special RFI-shielding mechanism, which is an integral

part of the connectors in the UniPoint® 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.

Note: Placing any object on a surface (such as a conference table) before its ﬁnish is fully

cured may result in damage to the ﬁnish.

Architect’s and Engineer’s Speciﬁcations

The microphone shall be a ﬁxed-charge condenser designed for use in surface-mount applications. It shall have an omnidirectional polar pattern in the hemisphere above the mounting surface and a frequency response of 40 Hz to 20,000 Hz. The microphone shall operate from an external 11V to 52V DC phantom power source. It shall be capable of handling sound input levels up to 130 dB with a dynamic range of 105 dB. Nominal open-circuit output voltage shall be 17.7 mV at 1V, 1 Pascal. Output shall be low impedance balanced (200 ohms). It shall oer outstanding rejection of radio frequency interference (RFI).

UniPoint® Microphones

Features

• Small-diameter omnidirectional capsule near boundary eliminates phase distortion and delivers clear, high-output performance

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

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

• Self-contained electronics eliminate need for external power module

• Heavy die-cast case and non-slip silicon foam bottom pads minimize coupling of surface vibration to the microphone

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

Description

The U841R is a wide-range condenser microphone with an omnidirectional polar pattern. It is designed for surface-mount applications such as high-quality sound reinforcement, conferencing, professional recording, television and other demanding sound pickup applications.

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

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

The microphone includes a 7.6 m (25') detachable miniature cable with a special TA3F-type connector that attaches to the microphone and an XLRM-type output connector.

The microphone comes equipped with a soft protective pouch. The microphone's heavy die-cast case and non-slip silicon foam bottom pads minimize coupling of surface vibration to the microphone. The microphone features a low-reﬂectance black ﬁnish.

Installation and Operation

The U841R 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.

The microphone should be placed on a ﬂat, unobstructed mounting surface. The sound source should not be below the plane of the mounting surface.

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.

Audio-Technica U.S., Inc. 1221 Commerce Drive Stow, Ohio 44224

T: 330/686-2600 F: 800/329-8628

The microphone shall have a 7.6 m (25') detachable miniature cable with a special TA3Ftype connector that attaches to the microphone and an XLRM-type output connector.

The microphone shall have a diameter of 65.0 mm (2.56") and a maximum height of 15.1 mm (0.59"). Weight shall be 84 grams (3.0 oz).

The microphone shall be housed in a die-cast case with a perforated steel grille. Finish shall be low-reﬂectance black. The microphone shall include a soft protective pouch.

The Audio-Technica U841R is speciﬁed.

Speciﬁcations

Element

Fixed-charge back plate, permanently polarized condenser

Polar pattern

Omnidirectional in hemisphere above mounting surface

Frequency response

Open circuit sensitivity

Impedance

Maximum input sound level

Dynamic range (typical)

Signal-to-noise ratio

Phantom power requirements

Weight

Dimensions

40-20,000 Hz –35 dB (17.7 mV) re 1V at 1 Pa 200 ohms 130 dB, 1 kHz at 1% T.H.D. 105 dB, 1 kHz at Max SPL

69 dB, 1 kHz at 1 Pa 11-52V DC, 2 mA typical 84 g (3.0 oz)

65.0 mm (2.56") diameter,

15.1 mm (0.59") maximum height

Output connector

TB3M-type

Cable

7.6 m (25.0') long, 3.2 mm (0.13") diameter, 2-conductor, shielded cable with TA3F-type and XLRM-type connectors

Accessories furnished

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

oers full details on its test methods to other industry

1 Pascal = 10 dynes/cm

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

Speciﬁcations are subject to change without notice.

professionals on request.

= 10 microbars = 94 dB SPL

frequency response: 40– 20,000 Hz polar pattern

200

100

12" or more on axis Roll-off

500

Frequency in Hertz

10k

LEGEND

10 dB

Response in dB

20k

Soft protective pouch

0˚

330˚

300˚

270˚

240˚

210˚

180˚

SCALE IS 5 DECIBELS PER DIVISION

30˚

60˚

90˚

120˚

LEGEND

200 Hz

150˚

1 kHz 5 kHz 8 kHz

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