Renkus-Heinz ICLive X Loudspeakers Distribute Intelligible Audio Inside a Leading Indonesian Hospital

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FOOTHILL RANCH, California, November 7, 2023 — Indonesia is the world’s largest archipelagic state, consisting of over 17,000 islands. Java, the world’s most populous island, is home to over 150 million people. In the past 20 years, hospitalizations in Indonesia for neurological-related conditions have increased rapidly, with stroke being the leading cause of death and disability in almost all hospitals in Indonesia. To improve stroke prevention, survival and rehabilitation, the Indonesian government’s Ministry of Health established a new hospital on Java to serve as the country’s epicenter of comprehensive brain and nerve health services. The 11-story hospital encompasses ​​11,000 square meters with beds for up to 350 patients. The hospital deployed steerable loudspeakers from Renkus-Heinz in their ballroom to deliver highly intelligible audio for medical seminars.

The hospital turned to PT Kairos Multi Jaya, Renkus-Heinz’s Indonesian distributor together with PT DKSI, for help outfitting the audio system in the ballroom. They recommended Renkus-Heinz’s ICLive X Series of steerable arrays to meet the hospital’s goals of even coverage and high intelligibility. The ICLive X Series provides complete customization of room coverage through individually steerable beams, and the loudspeakers’ high directivity made them the best choice for the hospital’s ballroom.

“There was no acoustic treatment in the ballroom, so the reverberation was considerable. Complicating matters further was that one wall consisted almost entirely of windows,” said Damaran Kristanto, system designer with Kairos Multi Jaya. “We chose ICLive X to direct sound to the audience and avoid areas without acoustic treatment. The loudspeakers are also slim and very easy to install, and the SPL was high enough that delay loudspeakers were not required.”

Kairos Multi Jaya installed two arrays in the ballroom, each comprised of one ICLX and one ICLXL. Four ICLX-118S subwoofers rounded out the system.

The ICLX steerable array module includes six 19 mm compression drivers on an Acoustic Source Multiplier (ASM) waveguide coaxially mounted in front of two 8-inch woofers. The woofer arrangements maintain significant pattern control down to lower frequencies, providing system designers with the horsepower, steerability and directivity to deliver consistent coverage and clarity in even the most challenging spaces.

The exclusive ASM waveguide minimizes acoustic source spacing, ensuring optimal high-frequency steering with no lobe distortions for precise, consistent performance. Additionally, the ASM allows the high-frequency section to be coaxially mounted in front of the low-frequency section, producing a consistent and symmetrical wave of high and low frequencies along the entire length of the array for excellent performance through the critical mid-frequency crossover region.

The hospital staff was thrilled with the audio performance. Meetings and seminars are intelligible throughout the 590 square meter ballroom, even for participants sitting towards the back. The full-range response of ICLive X paired with subwoofers was also an excellent choice for social gatherings in the ballroom involving live and recorded music.

“We’ll continue using ICLive X for challenging acoustic environments like the hospital’s ballroom,” said Kristanto. “The system works brilliantly, and we haven’t received any complaints. The beam steering is second to none for reverberant spaces.”

About Renkus-Heinz

Founded in 1979, Renkus-Heinz, Inc. is a leading manufacturer of professional loudspeaker technology and the recognized world leader in digitally steerable arrays. Known for cutting-edge innovations and exceptional customer service, Renkus-Heinz delivers premier sound solutions to the world’s most prestigious projects.

With an award-winning product suite including ICONYX Gen5 Series steerable column arrays and UBX Series passive column loudspeakers, Renkus-Heinz has sound solutions for a wide range of applications from performing arts venues, transportation hubs and houses of worship to educational, corporate and governmental facilities.

Renkus-Heinz is headquartered in Foothill Ranch, California, USA, with additional offices around the globe. For more information about Renkus-Heinz, please visit

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