The San Francisco Christian Center in San Francisco, California used Sonora™ Panels (shown on the right wall) and the "barrel shaped" Double Duty Diffusers™   (not shown) to improve sound quality in their sanctuary area. 

The Sonora™ Panels help to eliminate unwanted echoes and reflections.  The diffusers scatter both mid and upper frequencies as well as control and tighten the bass to clarify the sound and allow the choir's outstanding performance to be heard correctly throughout the sanctuary. 

Pictures courtesy of :
Mr. Bruce J. Green, audio systems consultant
Reference Point Design, Inc.
Pacifica, CA
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