How Haozhiseng Audio Powered a 4,000-Person Indoor Venue in Indianapolis, USA

Project Overview

Haozhiseng Audio delivered a professional sound reinforcement solution for a large indoor venue in Indianapolis, USA, designed to serve an audience of approximately 4,000 people.

The project required powerful output, wide and consistent audience coverage, clear vocal reproduction, controlled low-frequency performance, and dependable monitoring for musicians on stage. To meet these requirements, the system combined HA208P active line array loudspeakers, HA18SUB active subwoofers, and HA15M coaxial stage monitors.

The completed system provides the clarity, power, coverage, and flexibility required for indoor concerts, live bands, presentations, corporate events, and other large-scale productions.

The Project Challenge

A venue of this size requires more than high acoustic output. The sound system must distribute audio evenly across a large audience area while maintaining vocal intelligibility, musical detail, and balanced frequency response.

The main project requirements included:

• Reliable sound coverage for approximately 4,000 people
• Consistent sound pressure levels from the front to the rear of the venue
• Clear and intelligible vocal reproduction
• Powerful yet controlled low-frequency performance
• Sufficient dynamic headroom for live bands and concerts
• Accurate monitoring for vocalists and musicians
• A professional system suitable for different event formats
• Durable equipment for long-term commercial use

Audio System Configuration

Main PA System

The main PA system was configured with symmetrical left and right line array columns.

Each side of the stage features six HA208P active line array loudspeakers combined with two HA18SUB active subwoofers. This configuration creates a balanced stereo sound field while providing the output and coverage required for a large indoor audience.

The HA208 Dual 8-Inch Self-Powered Active Line Array System features dual 8-inch neodymium low-frequency drivers, a high-performance compression driver, integrated DSP-controlled Class-D amplification, and a wide horizontal coverage pattern.

The line array configuration helps distribute sound evenly throughout the venue, allowing audiences across the seating area to experience clear vocals, detailed instruments, and consistent sound pressure levels.

Powerful Low-Frequency Support

Four HA18SUB active subwoofers—two on each side—provide the low-frequency extension required for live music and high-energy performances.

The 18-inch subwoofer system adds depth and impact to bass guitars, kick drums, electronic music, and other low-frequency program material. When combined with the HA208P line arrays, the HA18SUB subwoofers help create a balanced full-range listening experience without overpowering the vocal and mid-frequency content.

This combination gives the system both musical detail and the powerful bass response expected from a professional concert sound system.

Clear and Accurate Stage Monitoring

Four HA15M 15-Inch Coaxial Stage Monitor Speakers were positioned across the front of the stage.

The HA15M uses a coaxial point-source design to provide focused sound coverage, clear vocal reproduction, and accurate monitoring of instruments. Its controlled dispersion directs sound toward the performers while helping reduce unnecessary sound spill across the stage.

This monitoring arrangement allows vocalists and musicians to hear themselves clearly, maintain timing, and perform confidently throughout the event. The HA15M also provides sufficient output and dynamic headroom for demanding live-performance environments.

Project Result

The completed Haozhiseng Audio system delivers powerful and balanced sound throughout the Indianapolis venue.

The left and right HA208P line array columns provide broad audience coverage and consistent sound distribution, while the HA18SUB subwoofers add deep, controlled low-frequency impact. On stage, the four HA15M coaxial monitors give performers the clarity and focused coverage required for a smooth and confident performance.

The system is suitable for a wide range of indoor applications, including:

• Live concerts
• Band performances
• Corporate events
• Conferences and presentations
• Houses of worship
• Cultural and community events
• Entertainment productions
• Professional rental applications

Why the Customer Chose Haozhiseng Audio

Complete Professional Audio Solution

Haozhiseng Audio can provide line array loudspeakers, subwoofers, stage monitors, amplifiers, DSP processors, cables, and related accessories as one coordinated professional audio solution.

This helps simplify system selection and ensures that the different components work together effectively.

Consistent Coverage for Large Audiences

The HA208P line array system offers scalable array configurations and wide horizontal coverage, making it suitable for medium- and large-scale venues where consistent sound distribution is essential.

Powerful and Balanced Sound

The combination of HA208P line arrays and HA18SUB subwoofers delivers clear vocals, detailed musical reproduction, strong acoustic output, and powerful low-frequency extension.

Reliable Monitoring for Performers

The HA15M coaxial stage monitors provide focused coverage and clear vocal reproduction, helping musicians hear their performances accurately even in high-output live sound environments.

Professional and Durable Construction

The loudspeaker cabinets use professional birch plywood construction, durable polyurea finishes, heavy-duty grilles, and reliable rigging hardware. These features make the equipment suitable for fixed installations, touring systems, and rental applications.

Project-Based Technical Support

Haozhiseng Audio supports customers with product selection, system configuration, DSP tuning, installation guidance, and project-specific recommendations.

Instead of supplying individual products alone, our team can help customers build a complete sound system based on venue capacity, coverage requirements, application, and budget.

OEM and ODM Manufacturing Capabilities

For distributors, audio brands, rental companies, and system integrators, Haozhiseng Audio also provides OEM and ODM services, including:

• Customized logos and branding
• Cabinet color and finish customization
• Amplifier-panel customization
• DSP and acoustic tuning
• Connector and configuration customization
• Customized packaging
• Complete project-based system solutions

Products Used in This Project

HA208P Active Line Array Loudspeaker

Professional dual 8-inch active line array system designed for concerts, touring productions, houses of worship, theaters, rental systems, and fixed installations.

View the HA208 Line Array System

HA18SUB Active Subwoofer

Professional 18-inch active subwoofer designed to provide powerful bass extension and high-impact low-frequency reinforcement for line array and large-scale PA systems.

View the HA208 and HA18SUB System

HA15M Coaxial Stage Monitor

Professional 15-inch coaxial stage monitor designed to provide clear vocals, focused coverage, and accurate monitoring for concerts and live performances.

View the HA15M Stage Monitor

Build Your Next Sound System with Haozhiseng Audio

Planning a concert venue, theater, house of worship, nightclub, conference hall, touring system, or rental project?

Haozhiseng Audio can recommend and customize a professional sound system according to your venue capacity, coverage requirements, application, and budget.

Contact Haozhiseng Audio today to discuss your next professional sound system project.