Commissioning - Community Entasys Installation & Operation Manual

Any driver service required is done from the front of the enclosure. This can be accessed by removing
the six screws from the top end cap. The mounting bracket must also be removed from the enclosure (see
Figure 4 on Page 17 for details). Carefully remove the top end cap. The grille may then be removed by gently
squeezing on its sides and pulling it away from the enclosure. Be careful to collect the soft plastic grille
extrusion pieces that fit on the top and bottom edges of the grille as they may fall off during the removal of the
grille.
The crossovers are not field serviceable. For warranty repair, contact Community directly or ask us for
the location of your nearest Authorized Service Center.
C H O O S I N G T H E R I G H T L O U D S P E A K E R S
Choose the necessary number of ENTASYS loudspeakers, with high enough maximum SPL, to provide
the needed SPL at the farthest listener with an appropriate headroom. Typical headroom factors are at least 6
dB for voice paging, at least 10 dB for voice reinforcement, and at least 20 dB for music reinforcement.
Select the proper ENTASYS loudspeakers and optional low frequency and/or subwoofer loudspeaker
models to achieve the right frequency response for the application. Subwoofers may improve the sound quality
of a music reinforcement system but may also reduce intelligibility in a voice-only system in a reverberant space.
Configure ENTASYS loudspeakers to have the right coverage pattern to cover the audience evenly.
Point the loudspeakers at the listeners and away from walls and ceilings or other obstructions.
Ideally, put all loudspeakers in a central location (central cluster design) or use a distributed system
design.
Choose power amplifiers large enough to achieve the needed SPL in the venue with enough headroom
to avoid clipping. Use a limiter and high pass filter to protect the loudspeakers. Follow proper wiring design and
adjust gains and levels to achieve the best signal-to-noise ratio.
C O M M I S S I O N I N G T H E S Y S T E M
Commissioning is the process of optimizing the performance of the system after it has been installed.
There are several steps in commissioning including verifying the proper operation of each system component
and adjusting system gains and levels.
The last step in system commissioning is known as system equalization or "voicing." Equalization is the
process of adjusting the frequency response of the system to optimize voice intelligibility or musical sound
quality (or both). Note that ENTASYS loudspeakers are factory voiced to optimize their speech intelligibility and
musical sound quality. For this reason, many designers find they can minimize overall system equalization and
still achieve excellent voice intelligibility and musical sound quality.
When equalizing an ENTASYS loudspeaker system the following points should be kept in mind to
achieve the best results and to avoid damaging the drivers.
1. Use only small amounts of equalization. In particular do not boost frequencies by more than about
3 dB. When cutting frequencies, attenuation of more than 3 dB is acceptable. Bear in mind that extreme
frequency cuts will usually result in less than optimum performance.
2. Do not attempt to boost any frequencies below 100 Hz with a graphic equalizer. Note that with the
recommended high pass filter, moderate amounts of boost from a simple bass control are acceptable.
F I E L D S E R V I C E
A N D E L E C T R O N I C S
Community ENTASYS Installation/Operation Manual — Page 46
INSTALLATION