Product Information
Miniature Cardioid Condenser Boundary Microphone
ES947C/TB3
■
Description
■
Connection procedure
This product requires 48 V
DC phantom power.
Cable Output terminals
PIN1 (ground)
PIN3
(cold)
PIN2 (hot)
■
Specifications
Fixed-charge back plate, permanently polarized condenser
Cardioid
70 - 15,000 Hz
-38 dB re 1V at 1 Pa
100 ohms
135 dB SPL (1 kHz at 1% THD)
110 dB (1 kHz at Max SPL)
69 dB (1 kHz at 1 Pa, A-weighted)
11-52 V DC, 2 mA
31 g
60.5 mm long, 20 mm head diameter
Integral 3-pin TB3M-type
•
1 Pascal = 10 dynes/cm
2
= 10 microbars = 94 dB SPL
*
Typical, A-weighted, using Audio Precision System One.
■
Polar pattern
■
Frequency response
Audio-Technica Corporation
2-46-1 Nishi-naruse, Machida, Tokyo 194-8666, Japan
©2017 Audio-Technica Corporation
Global Support Contact: www.at-globalsupport.com
10-FEB-2021 Form No.ATGC-L0402-21
SCALE IS 5 DECIBELS PER DIVISION
LEGEND
200 Hz
1 kHz
5 kHz
8 kHz
Thank you for purchasing this product. Before using the product, read through the user manual to ensure that
you will use the product correctly.
Please keep this manual for future reference.
ES947C/TB3 cardioid boundary microphone is an even smaller footprint and a great choice for installations with
limited space or where a very clean, inconspicuous look is desired. The miniature size also gives you the same
clear, highly intelligible audio of its larger sibling, mounting unobtrusively in tabletops, ceilings or panels for
conferencing, recording, monitoring and other demanding sound pickup applications.
Protected by a rugged all-metal case with a two-layer steel mesh grille, the microphone’s cardioid polar pattern
affords a 120° pickup angle, while its UniGuard® RFI-shielding technology provides outstanding rejection of
radio frequency interference (RFI).
The ES945C/TB3 is equipped with a self-contained power module with a TB3M (mini-XLR) output connector,
eliminating the need for an external power module. The power module can be powered from any external 11V
to 52V DC phantom power supply. It also comes with a TA3F-to-XLR cable, allowing for installation with
standard XLR inputs. The microphone is black colour, and comes with a pair of rubber isolators for optional
mechanical isolation from the mounting surface.
Avoid leaving the microphone in the open sun or in areas where temperatures exceed 43°C for extended
periods. Extremely high humidity should also be avoided.
Connect the output terminals of the microphone cable to a device that has a microphone input
(balanced input) compatible with a phantom power supply. The cable connector is an XLRM-type
with polarity as
shown in the figure below.
For product improvement, the product is sublect to modification without notice.
■
Safety precaution
■
Cautions for the product
Although this product was designed to be used safely, failing to use it correctly may result in an accident. To
ensure safety, observe all warnings and cautions while using the product.
• Do not subject the product to strong impact to avoid malfunction.
• Do not disassemble, modify or attempt to repair the product.
• Do not handle the product with wet hands to avoid electric shock or injury.
• Do not store the product under direct sunlight, near heating devices or in a hot, humid or dusty place.
Black
Element
Polar pattern
Frequency response
Open circuit sensitivity
Impedance
Maximum input sound level
Dynamic range (typical)
Signal-to-noise ratio*
Phantom power requirements
Weight
Dimensions
Output connector
Colour
Included accessories
Rubber isolator x 2, Nut,
7.6 m Microphone cable (TA3F, XLRM)
■
Features
• Designed for surface-mount applications such as conferencing, recording, monitoring and other demanding
sound pickup applications
• Low-profile element provides uniform cardioid polar pattern with 120° acceptance angle
• Miniature, space-saving design enables highly inconspicuous tabletop, ceiling and wall mounting
• Self-contained power module with TB3M (mini-XLR) output connector
• Includes a TA3F-to-XLR cable for use with standard XLR inputs
• Rugged all-metal case with a two-layer perforated grille
• Rubber Isolators provide mechanical dampening of mounting-surface vibration
• Requires 11V to 52V DC phantom power
• UniGuard® RFI-shielding technology offers outstanding rejection of radio frequency interference (RFI)
330°
300°
270°
240°
210°
180°
150°
120°
90°
60°
30°
0°
Ø 14.5
Ø 17
60.5
53.8
Ø 20
■
Dimensions
(Unit: mm)
Table/ceiling hole size
When using isolators
When not using isolators
Table
Rubber isolators
Nut
Front-of-mic indicator
M14P=1
Response in dB
Frequency in Hertz
LEGEND
0°, 50cm
10 dB
1k
10k
100k
100
10
10
0
-10
-20
-30
20
