Community ENTASYS Application Manual
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Community ENTASYS Application Manual

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ENTASYS
Application Guide

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  • Page 1 ENTASYS Application Guide...

  • Page 2: The Community Entasys Column Line-Array

    Sensitivity: Curved (12˚V): 93dB, Straight: (6˚V): 95dB Variable vertical coverage based on the number of units arrayed. • Maximum SPL: Curved (12˚V): 120 dB, Straight: (6˚V): 122 dB Vertical coverage angle varies by system configuration, frequency and listener distance. Community ENTASYS Application Guide - Page 2...

  • Page 3: Table Of Contents

    TABLE OF CONTENTS  The Community ENTASYS Column Line-Array ................... Page 2 Introduction to ENTASYS Systems ......................Page 4-11 Description Features Models Accessories and Options For More Information Community’s Technical Applications Group (TAG) Quick Start Guide ............................Page 11-17 Assembly of Arrays Connectors...

  • Page 4: Introduction To Entasys Systems

    D ES C R I P T I O N   The two models in the ENTASYS line of loudspeakers have been designed to achieve very high SPL, exceptional sound quality and outstanding speech intelligibility when deployed as part of a professionally designed sound system. They offer controlled, tightly focused vertical directivity with wide horizontal coverage.

  • Page 5: Accessories And Options

    ENTASYS Full-Range modules offer exceptionally tight vertical beamwidth and excellent vertical directivity control. The beamwidth begins to widen in the lower frequency regions below 1 kHz; this is not unique to ENTASYS, but rather is consistent with the laws of physics for a line array with the height of a single full-range column. The beamwidth in this lower frequency region can be significantly narrowed, to virtually match the beamwidth at higher frequencies, by adding ENTASYS Low Frequency columns to the array.

  • Page 6: For More Information

    ENTASYS Fly Kit: ENT-FK, ENT-FKW The ENTASYS Fly Kit (Figure 5) can be used to suspend an array of up to five ENTASYS modules. The Fly Bracket provides multiple attachment points at the top of an array while the Pull Back Bracket provides points lower on the array for additional aiming flexibility.
  • Page 7 INTRODUCTION  Figure 1: ENTASYS Mounting Bracket Figure 2: Coupler Bracket ENT-CB Eight set screws hold mounting bracket in place. Community ENTASYS Application Guide - Page 7...
  • Page 8 INTRODUCTION  Figure 3: Pan Bracket ENT-PB Community ENTASYS Application Guide - Page 8...
  • Page 9 INTRODUCTION  Figure 4: Pan-Tilt Bracket on Multiple Columns ENT-PT Community ENTASYS Application Guide - Page 9...
  • Page 10 INTRODUCTION  Figure 5: Fly Kit ENT-FK ENT-FK Community ENTASYS Application Guide - Page 10...

  • Page 11: Community's Technical Applications Group (Tag)

    The NL4-type input connector should be wired according to Figure 8. The top of the ENTASYS module is also equipped with a Signal Thru terminal, configured as a male dual banana jack (See Figure 9). Using the dual banana Jumper Plug included with each ENTASYS module, this Signal Thru terminal is used to connect adjacent ENTASYS modules in a multiple array.
  • Page 12 QUICK START  Figure 6: Recommended and Non-Recommended Configuration for Adjacent ENTASYS Systems RECOMMENDED: Adjacent enclosures have the MF/HF sections in a straight configuration. NOT RECOMMENDED: Adjacent enclosures have the MF/HF sections in a curved configuration. Community ENTASYS Application Guide - Page 12...
  • Page 13 QUICK START  Figure 7: ENTASYS Full-Range Column Input Panel Thru Barrier Strip Input Barrier Strip Terminals Terminals Dual Banana Female Input Connector NL4MP-Type Locking Connector 16-2 SJO Cable Recess Areas Figure 8: NL4-Type Connection Detail Community ENTASYS Application Guide - Page 13...

  • Page 14: Quick Start

    QUICK START Figure 9: ENTASYS Dual Banana Plug Jumper Figure 10: ENTASYS Bottom Cover Panel with Conduit Knock-Out Recessed Input Connector Area Bottom Cover Panel Bottom Cover Panel Attachment Screws 1/2 inch Conduit Fitting Community ENTASYS Application Guide - Page 14...

  • Page 15: Autoformer Placement

    When located below the module(s), the autoformer must be attached directly to a wall or other mounting surface (Figure 12). It is not designed to support the weight of an ENTASYS module, and should therefore not be directly mounted to an ENTASYS module from below.

  • Page 16: Amplifier Selection

    A M P L I F I E R   S E L EC T I O N   Table 1 shows the recommended power amplifier ratings for driving ENTASYS systems. Specifying amplifiers with these output power ratings will allow the maximum power to be delivered to the loudspeaker when the amplifier is driven to full output with a signal that has a 6 dB crest factor.

  • Page 17: Required High Pass Filter

    R EQ U I R E D   H I G H   PA S S   F I LT E R   The use of an external, active high pass filter before the power amplifier(s) driving ENTASYS systems is always required. This high pass filter will help to protect the woofers from damage due to excessive low frequency excursion.

  • Page 18: General Information About Line Arrays

    In either case, point source loudspeaker cabinets are generally built so that all the drivers function as one source. An example of point source type loudspeakers are Community VERIS and iBOX systems. Much like the behavior of a true acoustical point source, these systems usually have a fairly short near-field coverage;...
  • Page 19 The sightline issue is completely avoided by using the ENTASYS system design. The direct SPL on the room surfaces is shown in Figures 15 - 22. The odd number figures reflect the ENTASYS system, while the even numbers illustrate the point source system.
  • Page 20 GENERAL INFO ON LINE ARRAYS  Figure 13: House of Worship with ENTASYS Systems Figure 14: House of Worship with Point Source Loudspeaker System Community ENTASYS Application Guide - Page 20...
  • Page 21 GENERAL INFO ON LINE ARRAYS  Figure 15: ENTASYS System - Direct Sound SPL Map on Room Surfaces, Isometric View Figure 16: Point Source System - Direct Sound SPL Map on Room Surfaces, Isometric View Community ENTASYS Application Guide - Page 21...
  • Page 22 GENERAL INFO ON LINE ARRAYS  Figure 17: ENTASYS System - Direct Sound SPL Map on Room Surfaces, Plan View Figure 18: Point Source System - Direct Sound SPL Map on Room Surfaces, Plan View Community ENTASYS Application Guide - Page 22...
  • Page 23 GENERAL INFO ON LINE ARRAYS  Figure 19: ENTASYS System - Direct Sound SPL Map on Room Surfaces, Side Elevation View Figure 20: Point Source System - Direct Sound SPL Map on Room Surfaces, Side Elevation View Community ENTASYS Application Guide - Page 23...
  • Page 24 GENERAL INFO ON LINE ARRAYS  Figure 21: ENTASYS System - Direct Sound SPL Map on Room Surfaces, End Elevation View Figure 22: Point Source System - Direct Sound SPL Map on Room Surfaces, End Elevation View Community ENTASYS Application Guide - Page 24...

  • Page 25: System Design Guidelines

    In the field, the preferred methodology to ensure that the aiming conforms to the system designer’s specifications is with the use of a laser. The laser should be mounted to the top of the ENTASYS systems, and the point of the laser should then be compared between the projection in EASE and an actual reference point in the room.
  • Page 26 Focus provides for faster and easier array configuration and positioning than can be accomplished using EASE alone. Figure 24: SPL Map from EASE Focus of Three ENTASYS Full-Range Modules (400 Hz - 4 kHz) U S E   O F   T H E   LOW   F R EQ U E N C Y   M O D U L E  ...
  • Page 27 SYSTEM DESIGN GUIDELINES  Figure 25: Vertical Directivity Map of a Single ENTASYS Full-Range Loudspeaker (ENT-FR) Figure 26: Vertical Directivity Map of One ENTASYS Low Frequency Module (ENT-LF) Over One Full-Range Loudspeaker (ENT-FR) A directivity map is a plot of the radiated directivity pattern of a loudspeaker. It shows frequency on the x-axis (horizontal) and the off-axis radiation angle on the y-axis (vertical).

  • Page 28: Placement Of Entasys

    2 kHz and 4 kHz. In fact, the opening angle at 500 Hz is not much larger (just over 20 degrees), and at 200 Hz (the low frequency limit of ENTASYS) the opening angle is only 60 degrees. If tighter directivity control is required in this frequency region, the addition of a second Low Frequency module to the array will narrow it to an even more impressive 35 degrees at 200 Hz.

  • Page 29: Room Types

    ENTASYS system, which can provide optimal coverage with a limited number of loudspeaker locations. Figure 27 shows a room with dimensions of 60L x 30W x 12H feet (18.3 x 9.1 x 3.7 m), with a single Full-Range ENTASYS system on each side of the room.
  • Page 30 24.4 x 6.1 m) with an elevated stage area 4 ft (1.2 m) high that measures 18W x 40W x 16H ft (5.5 x 12.2 x 4.9 m). Here we have employed two arrays, each comprising two Full-Range ENTASYS systems. They are located 11 ft (3.4 m) above the floor, angled downward 4 degrees and aimed inward 5 degrees.
  • Page 31 For this room two arrays, each comprising four ENTASYS Full-Range modules, are placed slightly in front of the stage area along the side walls. The tops of the arrays are 20 ft (6.1 m) above the floor. The arrays are angled downward 4 degrees and aimed inward 30 degrees.

  • Page 32: When To Use Subwoofers

    90L x 50W x 12H ft (27.3 x 15.2 x 3.7 m). As a result, the reverberation times may be greater. We chose to use ENTASYS systems along each side wall, comprised of two Full-Range modules on top with one Low Frequency module on the bottom.
  • Page 33 Due to the nature of low frequency sound waves, these types of loudspeakers do not offer the directivity control of ENTASYS, and will radiate low frequency energy into the room in virtually all directions. Increased low frequency reinforcement – and the resulting increased low frequency reverberation – can have the effect of masking the perception of higher frequencies, thereby reducing the system’s overall intelligibility.
  • Page 34 SYSTEM DESIGN GUIDELINES  Table 3: Recommended Crossover and EQ Filter Settings for Use With Community Subwoofers Filter Frequency Bandwidth Level ENTASYS Full-Range only (ENT-FR) High Pass Filter 200 Hz 36 dB/octave Butterworth EQ 1 160 Hz 0.50 -7 dB EQ 2 375 Hz 0.30...
  • Page 35 SYSTEM DESIGN GUIDELINES  Table 3 continued: Recommended Crossover and EQ Filter Settings for Use With Community Subwoofers Filter Frequency Bandwidth Level VERIS 210S Subwoofer High Pass Filter 60 Hz 24 dB/octave Butterworth Low Pass Filter 190 Hz 24 dB/octave Butterworth EQ 1 70 Hz 0.33...
  • Page 36 GLL (Generic Loudspeaker Library) format. Data is also available as an EFO file for use in EASE Focus. These data files allow for accurate calculation of the SPL and directivity of ENTASYS systems at any distance greater than approximately 8 ft (2.4 m).
  • Page 37 SYSTEM DESIGN GUIDELINES  Figure 31: Wave Form and Peak/RMS Level of Noise with 6 dB Crest Factor Figure 32: Wave Form and Peak/RMS Level of Speech with 10 - 15 dB Crest Factor Community ENTASYS Application Guide - Page 37...

  • Page 38: Design Application Examples

    80% of the audience. Despite the very high directivity of the ENTASYS full-range modules, a distributed approach yields higher intelligibility by way of providing high levels of direct sound to the audience compared to reflected sound.
  • Page 39 DESIGN APPLICATION EXAMPLES  Figure 33: Measured RT60 (1 octave) interpolated to 1/3 octave resolution Figure 34: EASE SPL Map on Audience Area in Highly Reverberant House of Worship Community ENTASYS Application Guide - Page 39...

  • Page 40: Multi-Purpose Conference Center

    SPL. If rear wall reflections appear to be problematic, diffusion or absorption may be added. Loudspeakers, Brackets, and Power Amplifiers Used in This Design • (4) ENTASYS Full-Range Modules (ENT-FR) Each configured fully curved (as shipped from Community). • (4) ENTASYS Pan-Tilt Brackets (ENT-PT) •...
  • Page 41 Figure 35: SPL Map of Front Loudspeakers on Main Audience Area in Conference Center Figure 36: SPL Map of Delayed Loudspeakers on Rear Side Audience Area in Conference Center Figure 37: EASE SPL Map on Audience Areas in Conference Center Community ENTASYS Application Guide - Page 41...

  • Page 42: Small Theater Or House Of Worship

    Absorption on these side wall areas can help to address this. Loudspeakers and Power Amplifiers Used in This Design Two arrays, each configured as a single Full-Range module, fully curved (as shipped from Community). • (2) ENTASYS Full-Range Modules (ENT-FR) •...
  • Page 43 DESIGN APPLICATION EXAMPLES  Figure 38: SPL Map of Audience Area in Small House of Worship Figure 39: EASE SPL Map of Audience Areas in Small House of Worship Community ENTASYS Application Guide - Page 43...

  • Page 44: Split-Beam Array - Main Floor And Balcony

    Because of the large number of ENTASYS systems used, the system design specifies two separate amplifier channels for each array. Powering the two upper-most loudspeaker modules from one channel and the three lower ones from another amplifier channel will provide for a degree of independent level control over the modules covering the main floor and the balcony.
  • Page 45 Figure 40: SPL Map of Audience Area in a House of Worship with Balcony Upper Beam for Balcony Lower Beam for Main Audience   Figure 41: EASE SPL Map of Audience Areas in a House of Worship with Balcony Community ENTASYS Application Guide - Page 45...

  • Page 46: Multi-Purpose Room (Cafeteria/Gym/Auditorium)

    Using an array comprising three ENTASYS Full-Range modules, mounted at a height of 15.3 ft (4.7 m) with a downward angle of 2 degrees, achieves relatively consistent SPL across the audience area.
  • Page 47 DESIGN APPLICATION EXAMPLES    Figure 42: SPL Map of Audience Areas in a Multi-Purpose Assembly Room Figure 43: EASE SPL Map of Audience Areas in a Multi-Purpose Assembly Room Community ENTASYS Application Guide - Page 47...

  • Page 48: Large Public Space

    Community Technical Applications Group (TAG Team) for more detailed information.) While this example utilizes a parking garage, the implementation of ENTASYS in a similar manner to many large public spaces such as shopping malls, food courts, airport or train terminals, etc. can be equally advantageous.
  • Page 49 DESIGN APPLICATION EXAMPLES  Figure 44: EASE SPL Map of Large Public Space 0 ms 70 ms 0 ms 95 ms 335 ms 175 ms 255 ms 405 ms 115 ms Community ENTASYS Application Guide - Page 49...

  • Page 50: Comparison To A Distributed System

    ENTASYS Design Approach For the ENTASYS design, a single array is placed along the center of the front wall, thereby ideally locating the front of the audience area about 13 ft (4.0 m) in front of the loudspeaker. The audience area extends to a distance of about 75 ft (22.9 m) away from the array.
  • Page 51 VLF208. While both systems provide adequate coverage, the major component cost of the ENTASYS system is 35% less than the i2W8 overhead distributed system, including the subwoofer and additional amplifier. When the increased labor costs for the distributed system’s multiple loudspeaker locations is factored into the equation, it becomes clear that ENTASYS offers a real...
  • Page 52 DESIGN APPLICATION EXAMPLES  Figure 46: EASE SPL Map of Audience Areas in a Multi-Purpose Room Using ENTASYS Systems Figure 47: EASE SPL Map of Audience Areas in a Multi-Purpose Room Using a Distributed System Community ENTASYS Application Guide - Page 52...

  • Page 53: Guidelines For Commissioning The System

    It is also a good practice to measure the response of the sound system across the audience areas. The narrow vertical opening angle of ENTASYS systems can result in a seated person moving outside of the main energy beam by simply standing up.

  • Page 54: Reflections And Their Impact On Sound Quality

    For the purposes of this ENTASYS design handbook, the fol- lowing chart in Figure 46 details the relationships of reflections at various levels relative to the direct sound and the amount of time in milliseconds that transpires from the initial sound impulse until the reflection travels to the listener.
  • Page 55 Results here gave support to the view that a cross-correlation process is involved in subjective spatial impression. † Present address: School of Architecture, University of Western Australia, Nedlands, W. Australia. Community ENTASYS Application Guide - Page 55...
  • Page 56 High Performance Made to be Heard, Not Seen Community Professional Loudspeakers 333 East Fifth Street, Chester, PA 19013-4511 U.S.A. Phone (610) 876-3400 Fax: (610) 874-0190 www.communitypro.com ENTAG 19OCT2009...

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