Sound & Communications October 20, 2008 Issue

Mile Hi Church’s new facility is the third largest building on the church’s campus,and the largest dome building in metropolitan Denver CO.project’s most distinctive and aestheticallyappealing features, createdthe first challenge for the consultantand contractor.“An elliptical shape tends to want tofocus sound,” said Stephanie Adams-Ball, senior project consultant for D.L.Adams. “The oval or elliptical shapeis integral to the church’s religiousbeliefs. So, as much as the acousticsside doesn’t appreciate that shape, wehad to work with it.”Ceiling clouds backed with fiberglassinsulation, along with K13treatment sprayed onto the actualdome, absorb some of the sound.Most sound that hits the ceiling orwalls of the dome gets absorbed intothe K13; remaining sound reflectionsare absorbed by the insulation on theback of the ceiling clouds. The ceilingclouds provide diffusion, and create apattern in the ceiling that reflects thegeometry and architecture held sacredby the Science of Mind religion.The JBL line array’s placementalso played a large role in creating apositive acoustical environment. Accordingto Adams-Ball, who workedunder D.L. Adams vice president EdLogsdon on the project, the JBL VTsystem gave the client “a lot of bangfor the buck.” The boxes sit above thestage area, with eight VT4887 ADP-AN speakers and two VT4881 ADP-AN subs in each of two arrays.Purdom cites some of the keyfeatures of the system: “This is a selfpoweredsystem, so we didn’t needindependent amplifiers. The Crowndrive is built in. There’s onboard EQand DSP, and they are addressable onthe network through the system architecturesoftware from the Harmangroup.” Harman Professional’s HiQnetpermits the installer to access any Harmancomponents of the sound systemremotely through the network.Dual Renkus-Heinz SGX42 speakersfunction as front fills, placed behinda metallic grille underneath thelip of the stage. These are poweredby Crown CTs-8200USP/CN ampsand use dbx DriveRack 4820 DSPs.After installation, the integrator discoveredthat the line arrays rattled atcertain low frequencies. JBL recom-20 Sound & Communicationswww.soundandcommunications.com