This is a convenient online tool and resource for estimating the number of ceiling speakers needed for a sound reinforcement system in a room or listening area. Enter the room dimensions, Extron ceiling speaker model, anticipated type of playback content, and allowable variance in sound level between speakers. Results can be viewed and printed by selecting the VIEW/PRINT COVERAGE MAP button in the Results section. The calculator also determines the amplifier power necessary to drive the speakers, and allows users to delve even deeper with advanced options such as: Force Grid Spacing, Ambient Noise (dB SPL), Desired S/N (dB), Minimum Needed Level(dB SPL), and Maximum Target Level (dB SPL). Free; no login required.
http://www.extron.com/company/article.aspx?id=spkcalte& version=print
