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The Word is Heard in Southern California

Renkus-Heinz technology enables the Word to be heard at Garden Grove, Calif.'s St. Columban Catholic Church.

By Church Designer Staff   •  April 14, 2017 2:13 pm EDT

Tags: audio upgrade, avl design, sound reinforcement, worship space,

The first St. Columban Catholic Church in Southern California's Orange County was dedicated in 1947, followed by the construction of Murphy Hall in 1956. The area and the congregation continued to grow, and St. Columban's current sanctuary, built in 1968, is correspondingly larger than earlier buildings. Measuring 152.5 feet long by182 feet wide and seating 1,434, it features Roman Travertine marble-covered walls and mosaics depicting the stations in a flowing panorama. The congregation is diverse: Mass is celebrated in English, Spanish and Vietnamese.

The challenge

The church's original sound system dated back to the construction of the building and was never truly adequate. "When I arrived at St. Columban about two years ago, one big need that was expressed to me was to do something about the sound," recalls Father Al Baca. "The problem was very noticeable. In the back third of the church, speech was not intelligible at all. Catholic churches are generally built with a sensitivity to Gregorian Chant, to the ancient forms, which carry beautifully in a church like this. But spoken word is a challenge."

A solution enacted

To replace its outdated sound system and address the intelligibility issue, St. Columban's staff called on local AV firm AudioVideo Technologies Inc., which specified a Renkus-Heinz IC2 digitally steerable loudspeaker system. "During the design process, we brought in Renkus-Heinz to demo their IC2 loudspeakers," relates AudioVideo Technologies Founder and President David Lusk. "I was very impressed with what I heard. The sound was very evenly dispersed. Ultimately, we were able to design a system using a stack of two Renkus-Heinz IC2s on the left and a stack of two IC2s on the right. That's all the speakers we needed to cover the entire room."

Renkus-Heinz IC2 loudspeakers combine the advantages of point-source design with the control and flexibility of a digitally steered array. Controlled with Renkus-Heinz' RHAON software, IC² beams can be steered up or down while the stack or array remains vertical. The output can be delivered as a single, well controlled, vertical beam as tight as 10 degrees or as wide as 80 degrees. The beam center can be aimed over a 60 degree vertical range, up or down by 30 degrees. Horizontal dispersion is a consistent 120 degrees. The output can also be divided into up to four sonic beams, as was done at St. Columban. Each beam can be individually shaped and aimed and has its own acoustic center. Integral DSP-controlled, 8-channel Class D digital amplifiers provide 60 Hz to 20 kHz performance.

"The IC²'s steerable technology allowed us to precisely focus the sound at the pews and keep it off the marble-covered walls, the ceilings, and away from the hollow void in the middle of the space," explains Lusk. "The sound stays focused on the people, where it's supposed to be."

Renkus-Heinz' beam-steering technology proved a revelation for Lusk. "Renkus-Heinz steering technology forced me to change the way I do my designs," he admits. "I'm kind of old school. I've been doing this for about 30 years. I believe that the fewer moving parts you have in a project, the more reliable it's going to be. The IC2 is quite powerful, the sound is very clear, and with its precise beam-steering, we were able to cover everything with just two stacks and a total of four speakers. With a traditional approach, we might have needed 25 speakers-a lot more moving parts. Steering technology allowed me to keep it simple at St. Columban, and the results have been exceptional."

"We're delighted with the new sound system," confirms Father Baca. "Our sanctuary was constructed so that no member of the congregation is seated more than 100 feet from the main altar, and there are no pillars, so everyone can see. Now everyone can hear too."


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