Multi-Purpose Auditorium Sound Reinforcement System Design ECE 40020 Spring 2016 Zach Vander Missen Muhammad Farooq Garrett McMindes
Outline Primary System Design Constraints Venue Illustration System Design Constraints Loudspeaker Selection, Placement, and Rigging EASE Simulation Results Power Amplifier Requirements and Selection Signal Processing Requirements and Selection Mixing Console Requirements and Selection Microphone Requirements and Selection Signal Path Wiring Diagram Rack Requirements and Design Cabling and Wiring Requirements System Component List and Street Price Estimate Summary and Recommendations
Primary System Design Constraints Generic fan-shaped auditorium with seating for 6000 (approx. 3750 main floor, 1500 1 st balcony, 750 2 nd balcony) Minimum SPL of 105 db at back row of (main floor) seating No more than ±5 db variation in SPL over the entire seating space for the 500 Hz, 1 KHz, 2 KHz, 4 KHz, and 8 KHz frequency bands Frequency response of 40 16,000 Hz ± 5 db %ALCONS no greater than 10% over entire seating space Minimum 48-channel mixing console Minimum of 4 separate monitor mixes (and corresponding monitor loudspeaker systems) Support for 20 compatible wireless microphone channels Good assortment of general-purpose wired and wireless microphone systems Digital media recording/playback capability All equipment mounted in rack cabinet(s) Budget of $500 000
Venue Illustration
System Design Constraints Meeting SPL governed the project 105dB in the last row Ensure good speech recognition Low ALCONS Speakers make up a vast majority of budget Meet the seating requirement After SPL met, remaining money distributed Based on need and functionality
Loudspeaker Selection, Placement, and Rigging First JBL VerTec 4889-DA cluster of ten by stage Second Cluster mounted around 100 feet forward Both are mounted using the JBL VerTec 4889-AF Supported by JBL VerTec 4889-RIG Kits
EASE Simulation Results
Power Amplifier Requirements and Selection Speakers have built in amplifier Power required at speakers Sensitivity: 99 db LF, 102dB MF, 116 HF LF Power Cluster 1: 10^(42/10)=3162W LF Power Cluster 2: 10^(42/10)=3162W SPL required at Source Cluster 2: 105+20log(30)=135 db Cluster 1: 105+20log(30)=135 db
Signal Processing Requirements and Selection Yamaha PM5D Will function as both the mixer and DSP Reduces equipment cost and volume
Mixing Console Requirements and Selection Mixing Console Yamaha PM5D 48 Omni Outputs 96-kHz Processing Channel Move Function 8 Effect Processors 12 Graphic EQs Virtual Sound Check Capacity
Microphone Requirements and Selection Shotgun Microphone Rode NTG2 Condenser shotgun mic PCC Microphone Crown PCC-160 Boundary Microphone Hanging Microphones Audio-Technica Pro 45 hanging microphone General Wired Shure SM58 General Wireless ATW3193 ATW-3171 Drums Microphones MXL 603 Sennheiser E604 Tom and Snare Mic Shure Beta 52A Kick
Signal Path Wiring Diagram
Rack Requirements and Design Tripp lite 12U rack RackMac Pro Star Tech 25U Cabinet JBL VerTec 4889-AF
Rack Design Star Tech 25U Cabinet Layout AT antenna distribution unit AT antenna distribution unit AT antenna distribution unit AT antenna distribution unit AT antenna distribution unit AT antenna distribution unit Atlas ECS-204 Atlas ECS-204 Atlas ECS-204 Atlas ECS-204 Atlas ECS-204 RackMac Pro (RackMac Pro) (RackMac Pro) (RackMac Pro)
Rack Design Tripp Lite 12U Cabinet Layout Atlas ECS-204 Atlas ECS-204 Atlas ECS-204 empty(9x)
Cabling and Wiring Requirements Cat6 Cable XLR Patch Cables various XLR and ¼
System Component List and Street Price Cost Estimate Grand total
Summary and Recommendations Sound mapping completed and sufficient Potentially add fills to smooth out the SPL more Invest extra funds into better microphones and more advanced modules
Questions / Discussion