Multi-Purpose Auditorium Sound Reinforcement System Design ECE Spring 2017

Transcription

1 Multi-Purpose Auditorium Sound Reinforcement System Design ECE Spring 2017 Left to right: Maxwell Risinger, Riley Shannon, Skyler Carrico, Guanghua Zha

2 Outline Primary System Design Constraints Venue Illustration System Design Constraints Loudspeaker Selection, Placement, and Rigging EASE Simulation Results Power Amplifier/Signal Processing Requirements and Selection Mixing Console Requirements and Selection Microphone Requirements and Selection Signal Path Wiring Diagram Major Component List and Street Price Estimate Summary and Recommendations

3 Primary System Design Constraints Generic fan-shaped auditorium with seating for 6000 (approx main floor, st balcony, 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

4 Venue Illustrations Dimensions Volume: 6,758,557 ft^3 Surface Area: ft^2 Distance to Back Wall: 260 Max Room Height: 180 ft Stage Width: 80 ft Seating capacity: 7,800 Room Materials Ceiling: Acoustitle Walls: 2 Layer 5/8" Gypsum Thick upholstered chairs Carpeted Concrete Floor Omniffuser Difussion Panel at rear wall Wood-based stage

5 System Design Constraints Good speech intelligibility %ALCONS < 10% everywhere in room (Determined from speaker delay/distance) Goal reverb time between seconds for Hz Acoustic treatment materials to enhance RT Powered speakers to eliminate need for 3rd party amplification In-ear monitoring systems Rack-mounted equipment

6 Loudspeaker Selection, Placement, and Rigging Selection Main Arrays: JBL VT (34 units) High quality components Good directivity in arrays Alternatives considered D&B J8's decided against this option due to cost and EASE compatibility Front & Balcony Fills: Electro-Voice EVU- 2082/95 (26 units) Additional Balcony Fills (Ceiling): JBL Control 226C/T (12 units) JBL VT 4889 (Main Arrays)

7 Loudspeaker Selection, Placement, and Rigging Placement and Rigging Main arrays flown above the stage at stage left and right Subwoofers and front fills onstage at stage left and right Balcony fills placed at the ceiling of each balcony Front fills installed just below stage edge

8 JBL Main Array Rigging Features Two "J" Arrays, 14 speakers each L and R One "J" Array, X speakers Center Splay angles determined using JBL Software 3-way high-directivity element w/ Waveguide combining high & mid Comes with S.A.F.E. suspension and VRack rigging system Delays hung with ceiling mounted brackets

9 Fill (Delay) Speaker Features Front, Over & Under Balcony Fills Electro-Voice EVU-2082/95 (26 units) Easy to mount and hide Under Balcony Ceiling Fills JBL Control 226C/T (12 units) EVU-2082/95 (front and balcony fills) JBL Control 226C/T (in-ceiling fills)

10 EASE Simulation Results 500 Hz 500, 1k, 2k, 4k coverage

11 EASE Simulation Results 1000 Hz 500, 1k, 2k, 4k coverage

12 EASE Simulation Results 2000 Hz 500, 1k, 2k, 4k coverage

13 EASE Simulation Results 4000 Hz 500, 1k, 2k, 4k coverage

14 EASE Simulation Results 8000 Hz 500, 1k, 2k, 4k coverage

15 EASE Simulation Results ALCONS & RT 60 %ALCONS is below 10% everywhere, less the upper balcony ranging from 2-14% Reverberation time under 2 seconds for all frequencies staying around 1 second above 500 Hz Even, acceptable coverage

16 Power Amplifier/Signal Processing Requirements and Selection 34 JBL VT for main Arrays Total Max Power = 90,100 W Amplifier Selection: Crown I-Tech 4x3500HD - 8-Ohm Mono, W channels (x1) W, 26 inputs at 1400W --> 11 Amps needed for main arrays

17 Power Amplifier/Signal Processing Requirements and Selection 26 EVU-2082/ W each 12 JBL Control 226C/T W each Total Max Power = 43,600 W Amplifier Selection: Crown DCi Ohm Mono, 4 600W channels (x1) Crown DCi Ohm Mono, 8 600W channels (x1) Crown DCi Ohm Mono, W channels (x7) W, 26 inputs at 1400W --> 9 Amps needed for fill speakers

18 Digital Signal Processing & Stage Racks HARMAN BLU-806 DSP for all loudspeakers DANTE-enabled 16 analog output channels (11 needed) Cisco S200 Network Switch Ethernet connection Rack Design Rack room Amps, DSP, and Power sequencing for Fills Stage left & right Network switches, Yamaha RIO I/O box, Shure Wireless mic transmitters

19 Mixing Console Requirements and Selection Console Selection: Yamaha CL5 72 mono, 8 stereo input channels DANTE enabled 16-fader left, 8-fader center, 16-fader right Built-in meter bridge 24 monitor mixes / 8 matrices Playback: ipad with StageMix app CD/auxiliary capable backstage Connects with Mac & ProTools for recording Alternative considered: AVID Venue SC48 Closer to specifications but limited integration capabilities & fader/matrix configuration Yamaha CL5 To be positioned center main floor just before balcony

20 Microphone Requirements and Selection Requirement: at least 20 wireless mic channels Shure KSM137 KSM141 SM58/ULX-D2 Beta 181 PGA81 PGA27 WL93 WCM16 Countryman B6 Crown PCC160 (see BOM for quantities/costs) Accompanying Transmitters/Receivers Shure ULXD1 Wireless bodypack transmitter Shure ULXD4Q 4-channel wireless mic receiver, DANTE enabled

21 Signal Path Wiring Diagram

22 Major Component List and Street Price Cost Estimate

23 Summary and Recommendations Summary of work completed Created theater modal in EASE and simulation Signal pass design and equipment selection Results obtained from design and simulation +/- 5 db frequency response for all three theater stages Total cost: $465,000 How extra funds would be utilized if available Calibrate microphone, software and monitor for precising calibration Backup power source and circuitry protection device for incidental power outage

24 Questions / Discussion