Electrovoice 205-4t Guide De Référence

Page de 11
 
The Ceiling Speaker Systems – An Overview 
The EVID ceiling system product line provides premium-level performance at a value 
price.  Their wide coverage and high SPL capability allows the use of fewer speakers, 
resulting in lower system cost than the tight-spaced layout that low power narrow 
coverage speakers require.  The overall price differential of the EVID units to commodity 
type speakers is actually quite small when the assembly and component costs of these 
standard ceiling speakers is taken into consideration.  The EVID units are fully assembled 
and no additional installation components are generally needed.  An EVID system “pays 
for itself” very quickly. Locations with the highest sales per square foot are the ones who 
are most careful about sound quality, music programming, and customer satisfaction. 
VALUE OF PREMIUM PERFORMANCE: 
People are getting used to better quality sound in their homes, cars and entertainment 
spaces.  Their expectations have grown for better quality sound in retail, office and other 
background music spaces.  Using premium quality audio systems can help increase sales 
through improved customer perceptions of the business’s products or services.  It has 
now been well established that the quality of music in commercial spaces greatly impacts 
the customer’s perceptions of the products or services of the establishment. The dollar 
payback is substantial. High quality music also increases the friendliness and job 
satisfaction of the employees. 
A Unique Solution to an Age Old Problem 
High ceilings and reverberant rooms have long been the downfall of many ceiling based 
distributed sound installations.  The inherent desire for wide dispersion in smaller 
acoustically dead spaces works against the use of ceiling speakers in larger rooms with 
reverberant characteristics and higher ceilings.  Until now there has not been a cost 
effective solution that combines good quality full range audio with useful pattern control.  
Some ceiling products attempted to have pattern control at the high frequencies but this 
proved largely ineffective at the critical voice spectrum of the audio range.  The result 
was a speaker that had the same poor intelligibility problems when used in reverberant 
room as conventional ceiling speakers. 
The real solution to the problem requires that directionality must exist for the critical mid 
frequencies as well as the upper end of the spectrum.  For this to happen a new approach 
is needed. 
The EVID Solution – Why is it Different? 
The EVID C8.2HC – Wide spectrum Pattern Control in a Compact 
Package 
The EVID C8.2HC is designed to provide directionality through the critical voice 
spectrum by employing a unique (patent pending) ported waveguide to the entire 8” 
driver.  The resultant package is one that is compact, easy to install and provides far more 
intelligibility in reverberant or high ceiling environments than any other competitive 
model.  The C8.2HC also is designed for higher power, high SPL applications with a