L-Acoustics A15 at Ogres Kultūras centrs

In addition, the system needed to perform reliably across a wide range of program material—from speech and classical music to pop and rock concerts—while maintaining intelligibility, impact, and listener comfort. Achieving this level of versatility and consistency required careful alignment, optimization, and fine-tuning of all system components.

“Our goal was to achieve a system that delivers consistent, high-quality sound across the entire hall—detailed and musical at low levels, yet powerful and controlled for live concerts. Proper calibration was the key to making the system work as one cohesive solution.” — Ronalds Luknis, Application Engineer, VGD Project

Technical Solution

The A15 is an excellent price-to-performance solution for a venue of this scale. The hall does not require long-throw systems, and the 15-inch driver configuration of the A15 provides more than sufficient output and control. When paired with KS21 subwoofers, the system delivers a powerful and controlled low end suitable for modern concert requirements.
To support the rear seating areas, X8i hidden well in the ceiling as delay fills, significantly improving imaging and clarity for the last rows. Four 5XT coaxial systems as front fills greatly help to cover the first three rows, because the line arrays shoot sound over them.

This loudspeaker combination delivers consistent coverage throughout the hall while staying within the project’s budget constraints.

The sound system calibration process began with critical listening to understand the system’s behavior before applying any changes. Initial observations confirmed underpowered low frequencies, misaligned delays in the upper rows, and reduced clarity along the side seating areas.

Calibration Process

"From there, we implemented adjustments based on a pre-prepared Soundvision model and created a new Network Manager file. Many issues were resolved directly through filter optimization in Soundvision, - notes Sergey Zhitnikov, the Certified L-Acoustics Engineer. - The next step involved detailed acoustic measurements using measurement microphones to refine the frequency response and time alignment. Delay settings were then adjusted to bring all system elements into phase."

The final step of the calibration process involved extensive critical listening using reference tracks, allowing for fine adjustments by ear—an essential part of the process, as the ultimate goal is musicality and listener perception, not just measurement accuracy.

Result

The difference after calibration is night and day. With delays properly aligned, all system components—subwoofers, front fills, delays, and main arrays—now function as coherent extensions of one another rather than competing sources.

Post-calibration measurements show a smooth and consistent frequency response across the entire audible spectrum. Audience members experience detailed, intelligible sound regardless of seating position, while the delay system significantly enhances stage imaging for the rear rows.

The venue also benefits from a powerful and musical low end for concert applications, delivered without overwhelming the space.

“Once phase alignment and low-frequency control were addressed, the system started working as a single instrument. The clarity and low-end balance improved dramatically across the entire hall.” — says Sergey Zhitnikov.

Project Delivery & Expertise

The achieved results are a direct outcome of close collaboration between qualified and certified specialists at every stage of the project.

The system was delivered, designed, and calibrated by VGD Project, the L-Acoustics Certified Provider in Latvia, ensuring full compliance with L-Acoustics design methodology and calibration standards.

The physical installation was carried out by Rock Distribution, following best practices for loudspeaker deployment, rigging, and system integration.

This coordinated approach—combining system design, precise modeling, professional installation, and certified calibration—was key to achieving the required performance targets and delivering a stable, high-quality sound experience for the venue.

"I am very pleased about the quality of the sound in the hall, the system is plenty of powerful and provides a great coverage anywhere in the hall, - notes Ronalds. - The system can be detailed in low volumes, but it can also be turned on really loud and it won't hurt your ears, which is what ultimately, I think, is the goal".

There is always room for future improvement, and some upgrades are already planned, but even in its current configuration, this system can confidently compete with much larger and more prestigious halls in Latvia in terms of sound quality and acoustic performance.

“Calibration is not an optional step—it defines the final quality of the system. When done right, the result is stable, repeatable, and reliable for every event.” — says Sergey.

Photo credit: Maria Zhytnikova / Red Flame Creations.