Theatre Royal Nelson

1. Introduction

A Theatre Steeped in Legacy, Ready for the Future

Nestled in the heart of Nelson, New Zealand, the Theatre Royal Nelson is the oldest operating wooden theatre in the Southern Hemisphere. With a rich history dating back to 1878, this venue blends heritage charm with a modern cultural programme, hosting live music, theatrical productions, and community events.

To meet the evolving expectations of performers and audiences alike, Theatre Royal Nelson identified the need for a significant upgrade to its sound system. The existing system was no longer adequate for the dynamic demands of contemporary productions—especially those requiring clarity, power, and even coverage across a variety of genres and room configurations.

Partnering with Audio Workshop

Recognised throughout New Zealand for its excellence in audio system design, installation, and integration, Audio Workshop was selected to lead the upgrade. With decades of combined experience and a reputation for delivering high-end results in performance venues, Audio Workshop proposed a premium solution centred around the world-class L-Acoustics A10 series.

2. System Design and Components

Tailored for Clarity, Power, and Versatility

The system design focused on delivering exceptional coverage, headroom, and musicality, while remaining adaptable for a diverse calendar of events—from amplified musical theatre to intimate spoken-word performances.

Main PA System: A10 Focus & A10 Wide

To meet the main house coverage requirements, a L-Acoustics A10 modular line source system was chosen:

• A10 Focus

  • Narrower 10° vertical dispersion, ideal for long-throw applications.

  • Excellent intelligibility and vocal projection.

  • Used in upper array positions for focused reach to the back of the theatre.

• A10 Wide

  • 30° vertical dispersion, optimized for short to mid-throw.

  • Complements the Focus boxes to deliver consistent SPL and tonal balance across the listening area.

  • Deployed in lower positions of the arrays to cover front and mid-seating zones.

Together, these enclosures form a scalable line source array offering outstanding horizontal directivity control and seamless acoustic coupling.

Subwoofer System: KS21 in Cardioid Configuration

Low-end reinforcement is handled by KS21 high-power subwoofers, arranged in a cardioid configuration:

• Reduces low-frequency energy on stage and backstage areas.

• Enhances clarity for performers by controlling rear spill.

• Delivers punchy, musical low-end to the audience with minimal room interaction.

This configuration ensures bass energy is projected forward, limiting unwanted reverberation and improving system intelligibility.

Front Fill: 5XT Speakers

To ensure audience members in the front rows experience full-range sound, 5XT coaxial speakers were integrated as front fills:

• Ultra-compact but high-output design.

• Provides precise localization and consistent tonality with the main arrays.

• Discreet appearance complements the theatre’s historic aesthetic.

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Amplification and Processing

Power and processing were deployed using LA4X and LA2Xi amplified controllers from L-Acoustics:

• 3 x LA4X for the main arrays and subwoofers.

  • Each unit features 4x1000W RMS output and built-in DSP.

  • Networked control via LA Network Manager ensures precise tuning and monitoring.

• 1 x LA2Xi for the front fill 5XT units.

  • Compact 4-channel format, ideal for smaller speakers.

  • Integrates seamlessly into the L-Acoustics ecosystem.

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3. Installation Process

Site Assessment and Acoustic Planning

Audio Workshop commenced the project with a comprehensive site analysis, including:

• Acoustic modelling using Soundvision™ (L-Acoustics’ 3D simulation software).

• Verification of mounting points and weight-bearing capacity in the theatre’s historic ceiling structure.

• Identification of acoustically reflective and absorptive zones for optimal array angles.

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Step-by-Step Deployment

• Rigging and Safety Compliance:The main arrays were flown from existing rigging points with custom brackets, fully certified for theatre use.

• System Wiring and Termination:Audio Workshop technicians deployed low-loss cabling and high-quality Neutrik™ connectors for signal integrity.

• Tuning and Time Alignment:Using a combination of Smaart® real-time analysis and L-Acoustics LA Network Manager, the team meticulously adjusted delay times, EQ, and gain structure to ensure a cohesive sonic image across the listening area.

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Overcoming Challenges

• Historic Building Constraints:Mounting limitations due to the theatre’s heritage classification required bespoke rigging solutions and detailed consultation with engineers and venue staff.

• Acoustic Variability:The room's unique geometry demanded careful tuning to minimize reflections and ensure even SPL distribution.

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4. Performance Evaluation

Immediate Positive Impact

Post-installation feedback has been overwhelmingly positive from theatre staff, production crews, and audience members:

Key Performance Outcomes

• Even SPL coverage: ±3dB across all seated areas, including balconies and under-balcony zones.

• Reduced stage spill: Cardioid sub configuration effectively mitigated low-frequency feedback issues.

• Increased vocal clarity: System tuning revealed a noticeable improvement in speech intelligibility, especially for theatrical dialogue.

• Reduced load-in time: Visiting engineers require less time to tune and trust the system thanks to presets and consistent response.

  
  

5. Conclusion

A Modern Sound for a Historic Stage

The installation of the L-Acoustics A10/KS21 system at Theatre Royal Nelson marks a transformative step for the venue’s production capability. Thanks to Audio Workshop’s technical expertise and meticulous approach, the theatre now offers a world-class sonic experience that matches its storied heritage.

Future Recommendations

To ensure longevity and performance continuity, Audio Workshop recommends:

• Bi-annual maintenance checks of rigging, amplifiers, and cabling.

• Regular software updates for LA Network Manager and amplifier firmware.

• Optional integration of AVB or Dante for future digital routing upgrades.

  
  

About Audio Workshop

Audio Workshop is a leading provider of professional AV solutions in New Zealand, specialising in premium sound system design, installation, and live event production. With a commitment to engineering excellence and customer satisfaction, Audio Workshop helps venues deliver exceptional audio experiences tailored to their audiences.

For more information, visit audioworkshop.co.nz.