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KA-1 Line Array and KA28 Subwoofers: The Perfect Audio Solution for a 6,000–7,000-Person Concert Event
time2025/03/24
- KA-1 Line Array and KA28 Subwoofers: The Perfect Audio Solution for a 6,000–7,000-Person Concert Event
KA-1 Line Array and KA28 Subwoofers: The Perfect Audio Solution for a 6,000–7,000-Person Concert Event
When organizing a concert event with an audience size of 6,000 to 7,000 people, the configuration of the sound system is one of the key factors for the success of the event. How can we provide an immersive auditory experience for the audience while ensuring clarity and impact of the sound? Below is a suggestion for an audio system based on the Sinbosen KA-1 line array loudspeakers and KA28 subwoofers, which we hope will be helpful for customers when purchasing a loudspeaker system.
Speaker System Configuration
For a concert event with an audience of around 6,000 to 7,000 people, Sinbosen recommends using 12 KA-1 line array loudspeakers and 12 KA28 subwoofers. The KA-1 line array loudspeakers are renowned for their excellent audio quality, high sound pressure level, and precise coverage, ensuring even sound distribution in large venues. The KA28 subwoofers, with their powerful low-frequency output and cardioid array technology, provide a powerful low-frequency effect for the performance while minimizing low-frequency interference behind the stage.
Placement of KA-1 Line Array Loudspeakers
Main Loudspeaker Layout:
Line Array Design: Divide the 12 KA-1 line array loudspeakers into two groups of six each, suspended on both sides of the stage. This line array design effectively expands the sound coverage, ensuring that sound can be evenly propagated to every corner of the audience area.
Height and Angle Adjustment: The suspension height of the loudspeakers should be moderate. It is generally recommended that the central axis of the loudspeakers points to the last row of the audience. The loudspeakers on both sides should be tilted inward appropriately to reduce sound diffusion and attenuation, while avoiding sound reflection to the back of the stage.
Avoiding Obstruction: When suspending the loudspeakers, ensure that they are not obstructed by stage scenery, lighting frames, or other equipment to avoid affecting the sound propagation.
Placement of KA28 Subwoofers
Subwoofer Layout:
Cardioid Array: Place the 12 KA28 subwoofers at the front of the stage in a cardioid array. This arrangement effectively controls the direction of low-frequency radiation, reducing low-frequency interference behind the stage while enhancing the low-frequency effect in front of the stage. The cardioid array achieves this by placing some subwoofers back-to-back, using phase cancellation principles to reduce low-frequency propagation to the rear.
Position Selection: Subwoofers should be placed away from walls or corners to minimize the generation of standing waves. Standing waves can cause local imbalances in certain frequencies, affecting the uniform distribution of low frequencies.
Height Adjustment: Subwoofers are typically placed 10–35 cm above the ground, which allows them to better utilize their power output to produce strong low-frequency effects.
Subwoofer Settings Adjustment:
Level and Phase: Set the crossover frequency of the subwoofers around 80 Hz to ensure accurate low-frequency integration between the subwoofers and the main loudspeakers. The phase setting of the subwoofers should be adjusted according to their relative position to the main loudspeakers to avoid low-frequency cancellation.
Optimal Position Determination: The “crawl positioning method” can be used to determine the optimal placement of the subwoofers. Place the subwoofers behind or beside the main listening position, play low-frequency effects, and gradually move the subwoofers to find the best placement point.
System Configuration and Calibration
Amplifiers and Processors:
The KA-1 line array loudspeakers and KA28 subwoofers are driven by the LA12X amplifiers. These amplifiers offer powerful output and advanced DSP processing capabilities, allowing precise control of the loudspeakers' performance to ensure clarity and dynamic range of the sound.
During calibration, professional audio analysis tools (such as Real-Time Analyzers, RTAs) should be used to measure the frequency response and sound pressure level distribution of the sound, ensuring uniform coverage in the audience area.
On-Site Testing and Adjustment:
Before the performance, multiple on-site tests should be conducted, including playing different types of music and testing vocal clarity. Adjust the angles, positions, and levels of the loudspeakers based on the test results to achieve the best auditory effect.
Work closely with the performance team to flexibly adjust the configuration of the sound system according to the content of the performance and the stage layout, ensuring that the sound quality remains optimal throughout the performance.
