MULTI-PURPOSE AUDITORIUM SOUND REINFORCEMENT SYSTEM DESIGN ECE SPRING 2015 ANDREW PAWLING LUKE BOEHNLEIN KELLIE BOHLIG ROB LINGENFELTER

Transcription

1 MULTI-PURPOSE AUDITORIUM SOUND REINFORCEMENT SYSTEM DESIGN ECE SPRING 2015 ANDREW PAWLING LUKE BOEHNLEIN KELLIE BOHLIG ROB LINGENFELTER

2 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

3 PRIMARY SYSTEM DESIGN CONSTRAINTS generic fan-shaped high school auditorium with seating for 5000 (approx main floor, 1500 balcony) minimum SPL of 105 db at back row of 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 ILLUSTRATION

5 SYSTEM DESIGN CONSTRAINTS (PRIMARY) Within audience no more than 5 db variation and minimum back row SPL of 105 Precise aiming of main arrays Balcony created need for delays Frequency response 40-16,000 Hz +/- 5 db drove loudspeaker selection Desire high-directivity array elements Budget $500,000 Top of the Line Speakers: JBL & EV Price may limit remaining equipment choices Still kept to well-known, reliable brands

6 SYSTEM DESIGN CONSTRAINTS (REMAINING) Seat 5,000 people widened the fan-shape of original EASE template Good speech intelligibility %ALCONS < 10% Determined from speaker delay/distance Acoustic Treatments enhanced RT 48 channel mixing monitor Good assortment of microphones Support for 20 wireless In-ear monitoring systems Rack-mounted equipment

7 ACOUSTIC TREATMENT Goal Reverb Time 1.3 seconds for Hz Alternating materials on walls behind audience Pyrok Acoustetment Plaster HF absorption Auralex LENRD Bass Traps

8 ACOUSTIC TREATMENT Goal Reverb Time 1.3 seconds for Hz Acoustetment could be used on ceilings too, but we found more of a need for LF RT reduction

9 LOUDSPEAKER SELECTION, PLACEMENT, AND RIGGING Top Choices JBL & EV High quality components Good directivity in arrays Alternative considered All EV Types/Placement Mains: JBL VTX-V25 Array Front fills: JBL AM-7212 Delays: EV Xi-1152

10 JBL VTX-V25 FEATURES Mains Two J arrays Side Position Vertical 6 speakers each Used JBL software to determine splay 3-way high-directivity element Patented Radiation Boundary Integrator Waveguide combining high & mid High quality drivers with reduced weight Comes with S.A.F.E. suspension & VRack system

11 JBL VTX-V25 FEATURES S.A.F.E. Suspension Each array weighs 576 kg Safety factor 6:1 (Can support 3,456 kg) Hardware integrated into enclosures Easy Adjustable Splay Angle Stop Mechanism Fast set-up, secure, anti-rattle System Integration with VRack 4 x per array (6 speakers) 3 Crown ITECH Amps Amps controlled by one interface Crown OMNIDRIVE DSP

12 JBL VTX-V25 ARRAY AIMING Originally had 12 on each side, halved the amount after looking at price JBL Line Array Calculator (PIC) Aiming at main floor & balcony seating

13 JBL AM7212 Front Fills 2-way full range 6 installed underneath stage Passive or bi-amp modes

14 EV XI-1152A Over & Under Balcony Fills 3 over, 3 under aimed toward back of audience Two-way full-range High SPL in limited space Delayed

15 EASE SIMULATION RESULTS 500 Hz 2 khz 1kHz 4kHz

16 EASE SIMULATION RESULTS 8 khz %ALCONS High Frequency dipped to 99 db %ALCONS range is 4 to 9% Very even coverage

17 POWER AMPLIFIER REQUIREMENTS AND SELECTION Loudspeaker specs & Wattage calculation EV Xi Sensitivity 98 db LF: 600 W (2400 Peak) HF: 75 W (300 Peak) JBL AM7212 Sensitivity 95 db LF: 1000 W (4000 Peak) HF: 700 W (2800 Peak) SPL required at Source EV Xi s: log(10) = 125 db JBL AM s: log(10) = 125 db Power Required (LF) EV Xi: 10^(27/10) = 501 Watts JBL AM: 10^(30/10) = 1,000 Watts

18 POWER AMPLIFIER REQUIREMENTS AND SELECTION Crown DCi N powers EV & JBL AM channels, 2400 W each Need 3 amps for 12 speakers VRack system integration for the arrays 3 Crown ITECH Amplifiers 4 channels, 3500 W each TFT LCD full-color touchscreen

19 SIGNAL PROCESSING REQUIREMENTS AND SELECTION BLU-806 provides DSP for front-fills & delays Primary and secondary ports for fault tolerance Low latency User-friendly Crown OMNIDRIVEHD DSP for main arrays Rack integration 1 interface controls 3 amps LevelMax Limiters AC Power failure prevention Each component Dante capable

20 MIXING CONSOLE REQUIREMENTS AND SELECTION Looked at Yamaha CL series Chose Yamaha CL3 Inputs: 64 mono, 8 stereo 24 mixes / 8 matrices 10 inch touch screen & ipad support Playback Connect to an Apple PC that has ProTools ipad with StageMix CD Players backstage

21 MIXING CONSOLE REQUIREMENTS AND SELECTION Mix Position Center main floor Before balcony

22 Shure ULXD2/SM58 Countryman B6 PGA27 KSM141 PGA81 Audix: I5 D2 D4 ADX51 D6 AKG: PCC160 MICROPHONE REQUIREMENTS AND SELECTION

23 SHURE ULXD2/SM58 musician vocal mic Cardioid $474 PGA81 live instrument mic Cardioid $124 PGA27 percussion instruments Cardioid $199 KSM141 orchestra, choir Cardioid/omnidirectional $399 Countryman B6 live speaker Omnidirectional $408.5

24 ACCOMPANYING RECEIVERS/TRANSMITTERS ULXD4Q Quad Channel Digital Wireless Receiver Dante digital networked audio over Ethernet XLR outputs Four channels of uncompromising audio $5015 ULXD1 Wireless body pack transmitter $445

25 AUDIX SET $899 ADX51 overhead mic cardioid I5 snare mic cardioid D2 tom mic hypercardioid D4 kick mic/tom hypercardioid D6 kick mic cardioid

26 AKG PCC160 Piano Supercardioid $349

27 SIGNAL PATH WIRING DIAGRAM STAGE MIX RACK ROOM HOUSE Black: XLR Red: Dante (Ethernet) Blue: BluLink (Ethernet)

28 RACK REQUIREMENTS AND DESIGN JBL mains come with VRack 4 x 3500 (need 2 units) Rack for remaining amps & DSP 3 Crown amps 1 Blu-806 DSP This rack can also house the VRacks Racks backstage (left/right) Each with 4 half-rack in-ear PSM and 4 wireless mic transmitters Network switch and Yamaha Rio Power sequencing & distribution Furman ASD-120AC Sequenced Power Distributer 6 duplex outlets 2 units to cover 9 amplifiers

29 RACK DESIGN Amplifiers, DSP, Power Sequencer in Rack Room PSM, Rios, Switch Backstage Racks - Left & Right

30 CABLING AND WIRING REQUIREMENTS Ethernet for Dante & Blu-Link Primus Cable 1000 Shielded XLR foot cables foot cables Power cables (NL8 & NL4)

31 SYSTEM COMPONENT LIST AND STREET PRICE COST ESTIMATE

32 SUMMARY AND RECOMMENDATIONS Extra funds Switch from Yamaha CL3 to CL5 Convert JBL arrays to 8 speakers each To Improve HF response Miscellaneous equipment Maintenance

33 QUESTIONS / DISCUSSION