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engineered sound

®

 microphones

ES963

Three-Element Multidirectional Boundary Microphone 

Features

•  Three cardioid condenser elements mounted in a single housing 
•  Easily reposition two elements (via levers on the microphone  
  base) to adjust the acceptance angle of the microphone from 360°  
  to 300°; each element can be powered and used individually or in  
  any combination
•  Also functions as a stereo boundary microphone
•  Provides full, efficient and flexible coverage of conference tables— 
  fewer microphones required
•  Small-diameter capsules near boundary eliminate phase distortion  
  and deliver clear, high-output performance 
•  Low-frequency attenuation improves sound pickup without  
  affecting voice quality
•  Cable routes through any of four recessed pathways on the  
  microphone base (or down for direct feed through a table surface);  
  no tools or disassembly required 
•  UniGuard

®

 RFI-shielding technology offers outstanding rejection 

  of radio frequency interference (RFI) 
•  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 ES963 is a three-element multidirectional condenser microphone. 

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 DC phantom power for operation. 

Elements can be powered and used individually, or in any combination. 

The microphone is equipped with UniGuard

®

 RFI-shielding technology, 

which offers outstanding rejection of radio frequency interference (RFI).  

Three cardioid condenser elements mounted in the microphone housing 

are factory set with an angle of 120º between them to provide complete 

360º coverage (in the hemisphere above mounting surface). Two positioning 

levers on the microphone base allow two of the three elements to be 

reoriented (with no tools or disassembly required) to offer angles of 

90º/90º/180º between elements – ideal for positioning at the end of long 

conference tables, for example. 

Four recessed pathways on the base of the microphone enable the 

user to route the cable as necessary to accommodate any installation 

requirements; no tools or disassembly are needed. The cable can also be fed 

directly down from the microphone base to route through a table surface.

The microphone includes a 7.5 m (24.6’) permanently attached output cable. 

Its free end is unterminated stripped and tinned pigtails. This allows the 

installer flexibility in interfacing with a variety of equipment. For custom 

installation, refer to the wiring chart for termination connection. 

The microphone’s heavy die-cast case and non-slip silicon foam bottom 

pads minimize coupling of surface vibration to the microphone. The 

microphone includes a soft protective pouch and features a low-reflectance 

black finish.

Installation and Operation

The ES963 requires 11V to 52V DC phantom power for operation.

Output from the microphone is low impedance (Lo-Z) balanced. The signal 

appears across the pair of colored wires (red and yellow wires for Element 1, 

white and blue wires for Element 2, green and brown wires for Element 3); 

audio ground is the shield connection. Output is phased so that positive 

acoustic pressure produces positive voltage on the yellow, blue and 

brown wires.

The microphone should be placed on a flat, unobstructed mounting surface. 

The sound source should not be below, or higher than 60° above, the plane 

of the mounting surface. The fixed element (3) is facing the front of the 

microphone, indicated by the Audio-Technica logo on the exterior housing.  

For 360° coverage, slide each of the two microphone positioning levers 

on the microphone base to the 120° positions. At this setting, ideal for 

providing omnidirectional coverage of four people at a round table, there  

will be 120° between elements; each of the two moveable elements (1 and 2) 

will face a triangle printed on the microphone’s exterior housing (

see Fig. A

).  

For 300° coverage, slide each of the two microphone positioning levers on 

the bottom of the microphone to the 90° positions. At this setting, ideal 

for covering three people at the end of a table, there will be 90° between 

elements; each of the two moveable elements (1 and 2) will face a circle 

printed on the microphone’s exterior housing (

see Fig. B

).

Figure A                                          Figure B

Since elements can be powered and used individually or in any combination, 

further flexibility is easily achieved. For example, with two elements 

powered (1 and 2 in the 120° positions) and the (unpowered) stationary 

element pointed away from the sound source, the microphone provides the 

functionality of a stereo boundary mic; with two elements powered (1 and 

2 in the 90° positions), the microphone provides figure-of-eight coverage; 

with a single element powered, the microphone functions as a standard 

cardioid boundary microphone. 

The cable may be routed through one of the four recessed pathways on  

the microphone base (or down for direct feed through a table surface)  

to accommodate any installation requirements without the need for tools  

or disassembly.

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.

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 three-element multidirectional fixed-charge 

condenser designed for use in surface-mount applications. It shall have 

three cardioid elements (cardioid in hemisphere above mounting surface) 

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