Multi-Purpose Auditorium Sound Reinforcement System Design ECE Spring Rahul Sarma - Ishaan Kohli - Matt Jordan

Transcription

1 Multi-Purpose Auditorium Sound Reinforcement System Design ECE Spring 2014 Rahul Sarma - Ishaan Kohli - Matt Jordan

2 Overview Primary System 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

3 Primary System Design Constraints Generic fan-shaped auditorium with seating for 4000 people (3000 main floor, 1000 balcony) Minimum SPL of 105dB at back row of seating No more than +/- 5dB variation in SPL over entire seating space tested at 1,2,4, and 8 KHz frequency bands Frequency response of 40-16,000 Hz +/- 5dB %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 cabinets Budget of $500,000

4 Design Constraints Minimum SPL of 105dB at back row of seating : Speaker Selection No more than +/- 5dB variation in SPL over entire seating space tested at 1,2,4, and 8 KHz frequency bands : Splay Angle Adjustment Frequency response of 40-16,000 Hz +/- 5dB : Individual Array Element Equalization %ALCONS no greater than 10% over entire seating space : Material Selection Speaker interactions (Constructive/Destructive interference) : Venue Design Safety : Rigging and Power Conditioning Reliability : Fully Digital Audio

5 Venue Illustrations - Initial

6 Venue Illustrations- Final

7 Venue Illustrations

8 Loudspeakers - Alternatives LYON (Meyer Sound) Compact Sufficient SPL No EASE Data Galileo Loudspeaker Management MILO (Meyer Sound) MILO 60, MILO 120 Compact Lightweight Insufficient SPL

9 Loudspeakers JBL VerTec VT4889ADP-CN 90 Horizontal coverage(above 250 Hz) 143 db SPL Peak at 1m 45 Hz - 16 khz (± 3 db) 40 Hz - 18 khz (-10 db) On-board Crown Audio Class I Amplifiers Modular Input Bay - Digital Audio Inputs HiQnet Compatible - through Cobranet

10 Loudspeakers - Subwoofers JBL VerTec VT4880ADP-CN 143 db SPL Peak at 1m 60 Hz khz (± 3 db) 48 Hz khz (-10 db) On-board Crown Audio Class I Amplifiers Modular Input Bay - Digital Audio Inputs HiQnet Compatible - through Cobranet

11 Loudspeakers - Front Fills JBL VerTec VT4888DP-CN 90 Horizontal coverage(above 250 Hz) 139 db SPL Peak at 1m 25 Hz khz (± 3 db) 29 Hz khz (-10 db) On-board Crown Audio Class I Amplifiers Modular Input Bay - Digital Audio Inputs HiQnet Compatible - through Cobranet

12 Loudspeakers - Rigging JBL s patented S.A.F.E. suspension system Premium heat-treated alloys Can be tilted up or down at radical angles Splay up to 10 between array elements Quick Release Pins (will not attach unless fully inserted) Certified 6:1 safety ratio

13 Loudspeakers - Placement

14 EASE Simulations - Total 1kHz

15 EASE Simulations - Total 2kHz

16 EASE Simulations - Total 4kHz

17 EASE Simulations - Total 8kHz

18 EASE Simulations - %ALCONS (OLD)

19 EASE Simulations - %ALCONS

20 Power Amplification All passive, all active, or a mix plan all considered An all active plan utilizing the JBL DrivePack DP-3 with onboard amplification and DSP o No external amplifiers required o Supplied amplifiers specifically designed for the system Digital audio signal provided over ethernet via a CobraNet system Main Arrays (JBL VerTec VT4889ADP-CN) o 3 Channel, Class I Amplifier o 6000W Peak, 3000W Continuous Front Fills (JBL VerTec VT4888DP-CN) o 3 Channel, Class I Amplifier o 6000W Peak, 3000W Continuous Subwoofers (JBL VerTec VT4880ADP-CN) o 2 Channel, Class I Amplifier o 6900W Peak, 3500W Continuous

21 Signal Processing Onboard DSP managed via CobraNet on HiQnet System Architect o Precision bandpass filtering o Equalization o Limiting o Self-monitoring System controlled on a Windows based computer at the FOH or even with a tablet Able to save multiple different scenes for quick changes

22 Mixing Console 56 inputs/64 outputs

23 Mixing Console Control with ipad USB Secure use Mini-YGDAI expansion Motorized faders Scene Memory

24 Mixing Consoles Alternatives No direct connectivity with Cobranet Adding a Cobranet adapter will increase latency

25 In-Ear Monitoring Clear-Com Single ear headset XLR-4F (4) Shure P2R215CL(Wired/Wireless)

26 Microphones for Instruments (1) Heil HDK-8 (1)DPA Mic 4099P (4) Shure SM57

27 Microphones (10) Shure SM58 wired for speech/vocals.

28 Mic Cabling & Accessories Mic Cabling (20) Kopel 25 XLR (20) Kopel 10 XLR (10) Kopel 50 XLR Snakes (2) Whirlwind Mini 12 Channel (2) Whirlwind Mini 6 Channel

29 Mic Accessories (10) K&M Tall Boom Stand (8) K&M Short Boom Stand

30 Rack FOH Rack Computer (recording and playback) Network Switches Power Conditioning Wireless Rack Wireless Mics Wireless Monitors Power Conditioning Stage I/O Box Analog to digital conversion w/ Yamaha AD8HR Conversion to CobraNet w/ Yamaha NHB32-C

31 Rack Design Stage I/O

32 Cable and Wiring Digital audio over CobraNet dramatically cuts down on wiring needs o Up to 64 channels of audio can be transmitted on 1 CAT5 ethernet cable o No signal degradation over long distances o Digital signals not affected by noise and interference o Cost of cabling greatly reduced EtherCON lockable cables used over long distances and in areas where the cable could be yanked out Downfalls include less intuitive wiring, and a fault in a single cable can ruin the show XLR and TRS cables on stage (Audio Technica)

33 Signal Flow Left Main Switch M7CL w/ 3x MY16 Cards Laptop Left Sub Switch NHB32-C AD8HR x3 Main Switch Mics Right Sub Switch Right Main Switch Front Fill Switch

34 System Component List and Cost

35 Summary and Recommendations Active JBL VerTec Array - On-board DSP and Amplification Yamaha M7CL Mixing Console Complete Digital Audio - Cobranet Shure In-Ear Monitors Selection of Wired and Wireless Mics Extra Funds: Upgrade Console, Invest in Network Architecture, Modular panels on speakers allow for constant upgrades without an overhaul of the system