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Audio and Light: Install at St. Pius, Part 2

May 26, 2011 1:08 PM, with Bennett Liles

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Editor’s note: For your convenience, this transcription of the podcast includes timestamps. If you are listening to the podcast and reading its accompanying transcription, you can use the timestamps to jump to any part of the audio podcast by simply dragging the slider on the podcast to the time indicated in the transcription.

When St. Pius Tenth Parish got a big new hard wall sanctuary, Audio and Light in Greensboro, N. C. was brought in to provide a sound system. Brian Cox is here to wrap up his talk with how he set up the monitoring for choir, pastor, musicians, and more. Next up on the SVC podcast.
Brian, thanks for being back with me for Part Two on the St. Pius Tenth Parish Church sound system you put into their new building. That was a challenging acoustic environment as the more traditional church designs generally are. We were talking in Part One about all the different monitoring situations that you have and in that reverberant an environment it must have been a trick to keep those reasonably isolated. What kind of amplifiers are you using for those at St. Pius?

OK, well Bennett, of course the Renkus-Heinz IC-24 Rs are self-powered so they take of their own application—everything else from the subwoofers to all of the other monitor amps, we’re using a plethora of Crown CTS amplifiers, anything from the CTS 600 to CTS 1200 and for the subwoofers I believe the CTS 2000’s. [Timestamp: 1:33]

OK, for the main speakers you had there, you had to get power to those so I guess in getting in on the ground floor of this project probably made a big difference in being able to get audio and power run to places like that.
Because the owner of the church got us involved so early we were able to get all of our conduit and raceways into their drawing set so the electrical contractor was able to have forced power at both columns that…the Razor are mounted on two large central supporting columns in the church which worked out, actually, perfect for us for the speaker locations. And so in those columns we had two power circuits available to us, and conduit for our signal and data runs back to the amplifier rack where the signals are all distributed from. Actually we sequenced those on with a Surgex power conditioner that also has a relay built in it so we that can turn those things on and off remotely and…so when they’re on they’re protected and when they’re off they’re protected. [Timestamp: 2:29]

And where’s the amp rack located?
It’s located in a room just behind house left, just behind where the choir sits, there’s a dedicated room where the dimmer system and the audio system reside as well as several other electrical panels. [Timestamp: 2:42]

And we’ve got some interesting acoustics at work here. How is the acoustic environment of the nave isolated from the chapel?
The isolation there is solely, basically, by glass doors so it’s not very isolated as well so fortunately they never have separate services going on in each one. Most of the time the chapel’s closed and not being used unless overflow during a large mass or during the day, the day chapel is being used and there’s nothing going on in the nave so fortunately for them the isolation wasn’t critical. [Timestamp: 3:13]

And you have the SGX-81 boxes in the nave?

How do those do? Is there a particular reason you went with those?
The reason I went with them was mainly for their cost and performance. We wanted something small and there’s not a very large room to cover and so we could get four of them in there and have two for when you’re facing one way and two when you face the other way. And it worked out, it was a clean install…they hang well with their little Omni mounts and they’re custom colored to match the walls and nobody really even notices. [Timestamp: 3:42]

And of course you got to control all this. Where’s the control point for the system? What sort of mixer do you have in there?
Well, if I can step back for a second, all these different amplifiers and all these signals we process all the audio with a Biamp AudiaFLEX system. We have one CobraNet based AudiaFLEX chassis with various analog inputs in it and two separate Audia XP or inputs that connect to the AudiaFLEX via CobraNet and so that’s what distributes all of our audio out to the various amplifiers and the re-consigned speakers and we have several live inputs available in the chapel that you can get audio in without having to have the main mixer on and that we use the Audia XPs for that. The main FOH console is located near the rear of the nave in a nice HSA Inspire extended desktop that is…it was actually custom made and made with maple wood to match the pews exactly. And the FOH console is a Yamaha M7-CL32 channel. [Timestamp: 4:43]

OK, that sounds like you can handle pretty much anything they can throw at you as far as capacity.
Yes we have, I believe, 24 audio SIMS from the choir in floor boxes in the choir area where the band will setup so we have plenty of inputs there. We have another eight inputs up on the sanctuary platform for anything that they would ever do up there. So we feel like we gave them plenty of capacity, input wise, for the future. [Timestamp: 5:08]

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