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Multi‐Purpose AuditoriumSound Reinforcement System Design
ECE 40020 ‐ Spring 2016
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Outline
• Primary System Design Constraints• System Design Constraints • Venue Illustration• 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
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Primary System Design Constraints
• Generic fan‐shaped auditorium with seating for 6000 (approx. 3750 main floor, 1500 1st balcony, 750 2nd 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
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Primary System Design Constraints
• Minimum of 4 separate monitor mixes with corresponding monitor loudspeaker systems
• Support for 20 compatible wireless microphone channels
• Good assortment of general‐purpose wired and wireless microphone systems
• Digital media recording and playback capability
• All equipment mounted in rack cabinets
• Budget of $500,000
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System Design Constraints
• Long auditorium, was going to need delay speakers• Only used speakers that have EASE models/data • Powered speakers for ease of use and don’t have to buy extra amps• Wanted network Enabled devices
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Venue Illustration
• Dimensions• 320‘ long• 225‘ wide• 85.5‘ high
• Seating• 3728 on main floor• 1498 on first balcony• 880 on second balcony• 6106 total
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Loudspeaker Selection, Placement, and Rigging
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Loudspeaker Selection, Placement, and Rigging
Name Amount Position
JBL VRX 932LAP 48 above
stage
Meyer Sound UPM‐1P 22 on stage
JBL VTX F15 8 under balcony
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VRX-AF
EASE Simulation Results
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Freq: 500 HzMax SPL: 111.77Min SPL: 106.35
EASE Simulation Results
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Freq: 2000 HzMax SPL: 108.04Min SPL: 100.9
EASE Simulation Results
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Freq: 8000 HzMax SPL: 107.26Min SPL: 98.74
EASE Simulation Results
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Max ALCons: 8.75%
Signal Path Wiring Diagram
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Power Amplifier Requirements and Selection
• Electrical watts example calculation
• 1m/1w 108 db• Want 100 dB at a seat 20 ft away• 20*log (20) = 26 dB• 10 db for peak head room• 100+26+10 = 136 dB• 10^(28/10)= 631 W• 200W/800W peak so within range
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Only needed 4 I-tech 4x3500HD amplifiers for our 8 delay speakers, rest are self powered
Delay speakers are bi-amped Expensive, but recommended by manufacture
Speaker Power ratings:HF: 200W/800W peakLF: 1000W/4000W peak
Signal Processing Requirements and Selection
Symetrix Edge DSP• Dante networked• 2 4‐channel Analog output cards
• 2 4‐channel Digital output cards
• All the processing we will ever need
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Cabling and Wiring Requirements• No need for a snake because of Dante• SpeakOn to be used in arrays and delays• Xlr used on front fills, wired mics, wireless receivers to Rio box (convert from xlr to Ethernet)
• Ethernet used from stage inputs to console and from console to DSP
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Hardwear quantity
ethernet cable 200ft 2
xlr cable 30ft 4
xlr 50 ft 16
xlr 20 ft 10
xlr 10 ft 45
speakon 3ft cable 43
speakon 50ft cable 11
Mixing Console Requirements and Selection
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• 72 mono, 8 stereo input channels, dante
• 24mixes/ 8 matrices
• Fader configuration: 16‐fader left section, 8‐fader Centralogic section, 8‐fader right section, 2‐fader master section .
• Built‐in meter bridge.
Requirements:• minimum 48-channel mixing
console• minimum of 4 separate monitor
mixes • digital media recording/playback
capability
Yamaha CL5
Microphone Requirements and Selection
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Requirements• good assortment of general‐purpose wired and wireless microphone systems for speaking, individual vocalists, a variety of musical instruments, choral performances
• 20 wireless microphones
Wireless Beta58
Beta 52A
Beta 181Countryman E6
Microphone Requirements and Selection
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Microphones quantity pattern wired y/n details
1ulxd2/b58 2super card n vocal dymanic mic
2ulxd2/b87 2super card n vocal condenser mic
3beta56A 3super y toms and snare
4beta52A 1super y kick drum
5beta 98H/c 1card y brass instrument
6beta 181 2all y
changeable pattern, drum overhead, ambinet, snare
7ulxd2/sm58 2card n dynamic
8ksm8 1card y proximity effect reduction
9CVO 12card y condenser
10countryman E6 4omni n condenser
11ulxd1 10n/a transmitters
12wa305 4n/a n guitar/bass
13wl93 2omni n lavalier mic
14ew D1‐845‐s‐nh‐us 4super n vocal mic
CVO choir mic
EW 845
ksm8
Beta 56A
Rack Design
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On stage rack Delay Rack DSP Rack
• Mac will sit on top of DSP rack
• Amp rack may be located in a side room
Will Use 3 Odyssey racks• One meduim duty 6 space carpeted amp rack• One black label 12 space rolling rack• One 2 space rack carpeted for DSP
System Component List and Street Price Cost Estimate
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Hardwear what is it units cost per unit cost of groupJBL VRX 932lap 48 5398 259104meyer sound upm‐1p 22 2100 46200vtxf15 8 2850 22800Yamaha CL5 console 1 27,499 27499rio3224‐D analog to dante converter 1 8,499 8499Shure ULXD4Q shure wireless reciever 4 5,015 20060P3TRA215CL personal monitor systems 4 799 3196EM D1 sennheizer wireless receiver 4 499 1996vrx932LA‐AF array hangers 8 1,049 8392I‐tech 4x3400 amplifiers 4 11,115 44461symetrix edge dsp 1 rack unit 1 5,100 5100 4 channel analog output card bss bludigital 2 269 538 4 channel digital output card bss bludigital 2 269 538ethernet cable 200ft cabling 2 33 66mac book pro computer 1 1,299 1299xlr cable 30ft cabling 4 30 119.96xlr 50 ft cabling 16 15 240xlr 20 ft cabling 10 15 150xlr 10 ft cabling 45 15 675odyssey 12 space rack rack 1 232 232
odyssey 6 space rack rack 1 180 180odyssey 2 space amp rack rack 1 90 90speakon 3ft cable 43 8 344speakon 50ft cable 11 23 253
Microhones mics 50 14994
Total 467,025.96
Speakers
Hardwear
Summary and Recommendations• Summary of work completed
• Drew up 6,000 seat auditorium• Placed and aimed speakers to meet minimum coverage requirements• Researched different consoles, amplifiers, and DSPs to find the right ones for us• Cost spreadsheet of all components
• Results obtained from design and simulation• Within 5 db difference of 105 dB at all seats• Difference in levels between low and high frequencies is also less then 10 dB• People in the back get the quietest, people in the middle of the first floor get the loudest
• Networked cable and powered speakers make things easier• How extra funds would be utilized if available
• Better wall materials• Higher quality mics• Band shell
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Questions and Discussion
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