Void Arcline 8 User Manual
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Void Arcline 8 User Manual

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User Guide V1.0

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  • Page 1 Arcline 8/212 User Guide V1.0...
  • Page 2 This user guide is subject to change without notice. For the latest online version, visit: www.voidacoustics.com Void Acoustics and the Void logo are registered trademarks of Void Acoustics Research Ltd. in the United Kingdom, USA and other countries; all other Void trademarks are the property of Void Acoustics...

  • Page 3: Table Of Contents

    Typical configurations 4.2.2 Key features Stacking 4.2.3 Arcline 8 specifications Flying Arcline 8 4.2.4 Arcline 8 dimensions Flying Arcline 8 with Arcline 212 Arcline 212 4.3.1 Overview Service 4.3.2 Key features 4.3.3 Arcline 212 specifications Appendix A - Line array basics 4.3.4...

  • Page 4: Safety And Regulations

    Void Acoustics Research Ltd for 1.2 Limitations reprocessing. For more information about where you can send your waste equipment for recycling, please contact Void Acoustics Research Ltd or one of your local distributors.

  • Page 5: Limited Warranty

    Void free and clear of all liens or other specifications for each respective model. Void agrees restrictions.

  • Page 6: Unpacking And Checking

    3 Unpacking and checking All Void Acoustics products are carefully manufactured and thoroughly tested before being dispatched. Your dealer will ensure that your Void products are in pristine condition before being forwarded to you but mistakes and accidents can happen.

  • Page 7: About

    In buying this product, you are now part of the Void family and we hope using it brings you years of satisfaction. This guide will help you both use this product safely and ensure it performs to its full capability.

  • Page 8: Arcline 8 Specifications

    Rigging angle pre selected before you lift the enclosures Ground stackable A2 stainless steel Finish Textured TourCoat polyurea Grille Perforated steel with foam filter Measured in half space AES2 - 1984 compliant Calculated Arcline 8/212 User Guide V1.0 Page 8...

  • Page 9: Arcline 8 Dimensions

    4 About 4.2.4 Arcline 8 dimensions 733.5 (28.9”) 881 (34.7”) 733.5 (28.9”) 470 (18.5”) 881 (34.7”) 881 (34.7”) 733.5 (28.9”) 881 (34.7”) Figure 4.1: Arcline 8 dimensions Arcline 8/212 User Guide V1.0 Page 9...

  • Page 10: Overview

    50Hz, while also reaching up to 200Hz. For ease, the Arcline 212 is flyable with the Arcline 8. It can be used in any application where suspended bass is required, including large venues and medium to large scale touring.

  • Page 11: Arcline 212 Dimensions

    4 About 4.3.4 Arcline 212 dimensions 876 (34.5”) 733.5 (28.9”) 470 (18.5”) Figure 4.2: Arcline 212 dimensions Arcline 8/212 User Guide V1.0 Page 11...

  • Page 12: System Compliance

    19 Arcline 8 line-array elements BGV D8 and Conforms to BGV D8 and BS7906-1 Category BS7906-1 Category B B for suspending: 24 Arcline 8 line-array elements as a static load with secondary suspension Arcline 8 line-array BGV C1 Conforms to BGV C1 for suspending:...

  • Page 13: Cabling And Wiring

    Do not supply electrical power to equipment that has become coated in moisture (e.g. condensation) • Do not access the inside of any electrical equipment. Refer servicing to Void-approved service agents. 5.2 Cable considerations for fixed installations We recommend specifying installation-grade Low Smoke Zero Halogen (LSZH) cables for permanent installations.

  • Page 14: Arcline 8 Wiring Diagram

    1.4” HF Passive crossover 1.4” HF Out/Link 8” MF 8” MF 8” LF 8” LF Figure 5.1: Arcline 8 wiring diagram speakON pins 1+/1- speakON pins 2+/2- LF (2 x 8”) MHF (2 x 8” and 2 x 1.4”) LF link MHF link 5.4 Arcline 212 wiring diagram...

  • Page 15: Arcline 8 Bias Q5 Speakon

    LF 1- MHF 2+ MHF 2- LF 1+ LF 1- MHF 2+ MHF 2- Figure 5.3: Arcline 8 Bias Q5 wiring Bias Q5 Output 1 Output 2 Output LF (2 x 8”) MHF (2 x 8” and 2 x 1.4”) Note that Q5 amplifier output channels do not share a common ground for “1-”...

  • Page 16: Arcline 212 Bias Q5 Speakon™ Wiring

    Note that Q5 amplifier output channels do not share a common ground for “1-” and “2-” • Avoid grounding Q5 amplifier outlet pins or loudspeaker connector pins • Never wire loudspeaker installation panels with common Ch1 and Ch2 loudspeaker return lines Arcline 8/212 User Guide V1.0 Page 16...

  • Page 17: Amplification And Control

    Armonía Plus. Figure 6.6: Armonía Plus workspace for a Void Arcline 8/Arcline 212/Arcline 218 Arcline presets and updates All void prestes are available through the marketplace in Armonia Plus as well as the latest firmware updates. Arcline 8/212 User Guide V1.0...

  • Page 18: System Design

    (*Overexposure to low frequencies used to be disregarded but it is now understood to cause significant hearing damage) 7.2 System design basics Void Acoustics Arcline systems may be vertically arrayed to form high-power line array systems of exceptional quality. The following points should be considered when designing any vertically-arrayed sound system: •...
  • Page 19 Delay towers should always be considered and budgeted for when designing system to cover more than 100 m in low humidity conditions. Relative humidity often falls below 30% on dry summer days – even in Northern Europe. Arcline 8/212 User Guide V1.0 Page 19...

  • Page 20: Ease Focus 3 Prediction Software

    To simplify day-to-day system design, the Void Acoustics Arcline 8 system has been designed to be compatible with industry-standard EASE Focus 3 prediction software.

  • Page 21: 100 M Flat Field Example

    Assuming you’ve familiarised yourself with EASE Focus 3 and know your way around it, here are some example plots of a house left array for a 100 m flat field using 16 x Arcline 8: (It makes sense to optimise one side before copying and pasting for stereo or multi-channel) A note about these auto-splay and manually-adjusted examples: •...
  • Page 22 Figure 7.1: Top view showing initial 2 kHz 3-octave coverage using EASE Focus 3’s “Conventional” auto splay Figure 7.2: Top view showing initial 6.3 kHz 3-octave coverage using EASE Focus 3’s “Conventional” auto splay (Good for checking HF propagation) Arcline 8/212 User Guide V1.0 Page 22...
  • Page 23 This is perfectly acceptable if mid and high frequency coverage is smooth and often reduces when larger array presets are employed. Figure 7.4: Side view showing initial 2 kHz 3-octave coverage using EASE Focus 3’s “Conventional” auto splay Arcline 8/212 User Guide V1.0 Page 23...
  • Page 24 – to provide up to 10-15% extra coverage distance – as a hedge against climatic effects. Figure 7.5: Broadband side view using EASE Focus 3’s “Conventional” auto splay Arcline 8/212 User Guide V1.0 Page 24...

  • Page 25: Manually Adjusting Splay And Gain

    – a fairly easy task with real-time network-controlled line array systems like the Arcline 8, even with varying atmospheric conditions – noise abatement restrictions often assume that the sound system will be as leaky as a wide-vertical point source and calculate maximum front-of-house (FOH) levels accordingly –...
  • Page 26 At first glance, you might argue that we haven’t improved things level-wise, but don’t forget that the above two plots are for just three (vocal) octaves so they are well below broadband SPL levels - see earlier. Arcline 8/212 User Guide V1.0 Page 26...

  • Page 27: Balconies And Bleachers

    – and then only when the highest gain section was driven into limit. So, it’s best to leave any array shaping to the Void Arcline 8 presets – which will be banded rather than broadband.
  • Page 28 - and another from the rear to the front of the floor. Figure 7.9: Venue side view showing initial floor & bleacher 2 kHz 3-octave coverage after manual inter-cabinet angle adjustments Arcline 8/212 User Guide V1.0 Page 28...

  • Page 29: Flying And Stacking

    Fly Frame inverted for stacked arrays (see section 8.4) Figure 8.1: Void Arcline 8 Fly Frame looking from front right - shackles and pip-pins stowed for trucking (Top four protective feet used when Fly Frame inverted for stacking)

  • Page 30: Laser/Inclinometer

    Your Void Arcline flying system can be fitted with a Sigma Electronics Prosight2 Laser/ inclinometer system for Fly Frame tilt angle verification and aiming. A typical Arcline 8 system is supplied with two sender units (one on each Arcline 8 Fly Frame) and a meter unit. Laser/inclinometer...

  • Page 31: Arcline 8

    Figure 8.4: Void Arcline 8 left side view–links stowed Note that Arcline 8 cabinets are usually trucked in groups of four, either cased straight (all set to 0°) to take up the minimum truck space or preset to the required inter-cabinet angle and cased tight-packed.
  • Page 32 When cabinets are linked together with only the rear Link pins, full angular movement is available due to the slotted rear link mechanism. Arcline 8 cabinets may be tight-packed – typically in groups of four – allowing all the inter-cabinet angles to be preset with the Angle Selection Slider and pre-pinned.
  • Page 33 The preset angle is obtained once the bottom boxes are lowered and the normal link pin reaches the top of the rear link slot. An extra pin is now inserted into the lock position to prevent accidental array compression – when an array is up-tilted, for example. Arcline 8/212 User Guide V1.0 Page 33...

  • Page 34: Arcline

    Arcline 212 lock position Arcline 8 and Arcline 212 front link follows the same procedure. See section 8.1.3 above for instructions on fitting the front link and pip-pin. Pip-pin removed Free movement possible using slider Slider in lock position Removing the rear pip-pin allows the rear link to move freely.
  • Page 35 Upper pip-pins in link position Once the cabinet is in position insert the lower pip-pins from the upper cabinet into the lock position. Note that for Arcline 8 use the upper lock position as shown above. Slider in cardioid position When deploying the Arcline 212 in cardioid configuration follow the same procedure but move the slider to the cardioid position and insert the pip-pin.

  • Page 36: Rigging Safety

    • Do not rig equipment that is worn, damaged, corroded, mishandled or over-stressed in any way • Do not fly more than 24 Arcline 8 cabinets • Do not stack more than 6 Arcline 8 cabinets • Use only Void-approved accessories.
  • Page 37 Typical flying sequence, once the Fly Frame has been flown and lowered Once you have familiarised yourself with the key features of the Arcline 8 Fly Frame and cabinet rigging facilities (section 8.1), flying the system should be easy. Follow this sequence: Assuming your Arcline 8 cabinets have been pre-linked and trucked in groups of four: 1.
  • Page 38 8. Link pins replaced (arrowed) Figure 8.10 : Steps 7 – 10 have been completed and the chain hoist and rear bridle have been removed Arcline 8/212 User Guide V1.0 Page 38...
  • Page 39 2. Remove these next four cabinets’ rear Lock position pins 3. Double-pin the Arcline 8 bridle assembly to the bottom cabinet’s lower rear lock & link positions and attach a bridle (see previous page) to the bottom cabinet’s lower rear pip-pin position 4.
  • Page 40 8. Link pins replaced (arrowed) Figure 8.12: Steps 7 – 10 have been completed and the chain hoist and bridle have been removed Arcline 8/212 User Guide V1.0 Page 40...

  • Page 41: Stacking

    Do not tether to scaffolding unless it has been specifically designed and ballasted for the purpose • When designing stacked Arcline 8 arrays, always use EASE Focus 3 with the latest approved Arcline 8 System definition (GLL) file installed – and ensure you make things safe if presented with warnings •...
  • Page 42 8 Flying and stacking Stacking your Arcline 8 system The Arcline 8 Fly Frame and Arcline 8 cabinets are inverted for stacking. Think of an Arcline 8 stack as a completely inverted array (below). Figure 8.14: Arcline 8 stack showing inverted Fly Frame and cabinets...
  • Page 43 The stacking spacers may be stowed at the rear centre of the Fly Frame for transportation. Stacking spacers in stowed positions Rear of inverted Fly Frame (Use pip-pin supplied) Figure 8.17: Stacking spacers in stowed position for transportation Arcline 8/212 User Guide V1.0 Page 43...

  • Page 44: Typical Configurations

    Figure 9.1: 3 x Arcline 218 and 4 x Arcline 8 A standard configuration for ground stacking is three Arcline 218 with four Arcline 8. This gives a loading of 2.66 Ω on channel 1 and 2 for the Arcline 218 and 4 Ω on channel 3 and 4 for the Arcline 8.

  • Page 45: Flying Arcline

    Bias Q5 Figure 9.2: 16 Arcline 8 Flying eight Arcline 8 per side for stereo sound with four cabinets per every two amplifier channels keeping the impedance at 4 Ω. Use one amplifer per side. Arcline 8/212 User Guide V1.0...

  • Page 46: Flying Arcline 8 With Arcline 212

    9.3 Flying Arcline 8 with Arcline 212 Bias Q5 Figure 9.3: Arcline 8 with Arcline 212 Arcline 8 and Arcline 212 should be configured in a 2:1 ratio. Two Arcline 212 and four Arcline 8 keeps the impedance to 4 Ω. Arcline 8/212 User Guide V1.0...

  • Page 47: Service

    Before returning your faulty product for repair, please remember to get an R.A.N. (Return Authorisation Number) from the Void dealer who supplied the system to you. Your dealer will handle the necessary paperwork and repair. Failure to go through this return authorisation procedure could delay the repair of your product.

  • Page 48: Appendix A - Line Array Basics

    In terms of relative sound pressure, sound pressure decreases by a factor of 20 x Log 2 every time you double the distance - a 6 dB level reduction per doubling of distance. Arcline 8/212 User Guide V1.0 Page 48...
  • Page 49 A straight vertical array will exhibit the directivity function for a uniform line source (assuming it’s driven with constant amplitude and phase over its length). Its directivity function will vary with the array length ÷ wavelength (L/λ): Arcline 8/212 User Guide V1.0 Page 49...
  • Page 50 (*Sound waves don’t, in fact, sum together; they pass through each other like ripples on a pond. Their effects only sum when they act in unison on the listener’s ear. But we usually refer to sound summation, as that’s what we experience as listeners) Arcline 8/212 User Guide V1.0 Page 50...
  • Page 51 Level changes are minimised by summing more and more cabinets to compensate for the usual radial attenuation with distance. Front audience area A is served by just one Arcline 8 at a time (7 or 8), area B with two (5 & 6), area C with three (3, 4 & 5), area D with five (1, 2, 3, 4 & 5) and area E with four (1, 2, 3 &...
  • Page 52 11 Appendix A - Line array basics A.2 Transition region and spectral balance As you can see from the previous illustration, summing an increasing number of Arcline 8 outputs to compensate for increasing listener distance works very well – assuming you’ve allocated an adequate number of Arcline 8s to cater for the venue depth.
  • Page 53 Most modern line arrays (e.g. the Arcline 8) are modular with each element having acoustically small vertical dimensions below a few hundred hertz (500 Hz and lower for the Arcline 8). Modular arrays rely very heavily on designers specifying a vertical array that’s long enough for spectrally balanced coverage to be provided.
  • Page 54 The illustration at the top of the following page shows a small, typically-curved array being deployed to cover 100 m. Figure A.8: Flown and curved 6-cabinet (1.71 m) Arcline 8 array – too short for 100 m - showing coverage level vs distance (red = 315 Hz oct, blue = 3.15 kHz oct) Flying and curving the array can move the coverage peak out a few more metres but the array still acts like a point source.
  • Page 55 11 Appendix A - Line array basics Figure A.10: Flown and curved 24-cabinet (6.84 m) Arcline 8 array showing good low-mid – high-mid spectral balance vs distance (red = 315 Hz oct, blue = 3.15 kHz oct) The 24-cabinet array is long enough for the low mid directivity to match the required mid/HF coverage of the array.
  • Page 56 21.7 dB 8 kHz loss at 100 m). Red= 8 kHz greater than 20 dB loss at 100 m, Orange= greater than -15 dB at 100 m, Brown greater than -10 dB at 100 m. Arcline 8/212 User Guide V1.0 Page 56...
  • Page 57 The illustration above is a marked-up screen shot from the programme. See www.acs.psu.edu/drussell/Demos/Absorption/Absorption.html for free laptop software and CDF file. Note that Void Acoustics cannot be responsible for non-Void applications. Use at your own discretion! There are many more on-line calculators and some phone apps that include an air absorption calculator.
  • Page 58 The air near the ground is usually warmer than the air above during the daytime and cooler than the air above at night or after a heavy rain shower. These temperature variations vs height are known as temperature gradients. Arcline 8/212 User Guide V1.0 Page 58...
  • Page 59 And other atmospheric effects may bring the sound back to earth again several kilometres away where ambient noise levels could be lower. Organisers should seek noise abatement history from the local authority to highlight hotspots and troublesome neighbours. Arcline 8/212 User Guide V1.0 Page 59...
  • Page 60 Sound gets “trapped” at ground level deprived of normal dispersion. Sound can often be clearly audible several kilometres away under these conditions - unless natural or man made barriers afford some attenuation. Arcline 8/212 User Guide V1.0 Page 60...
  • Page 61 After about three minutes of sound crew head-scratching, the air displacement is complete and the system settles down again. Figure A.18: Moving coverage shadow created by rapid air displacement in open-roof stadium Arcline 8/212 User Guide V1.0 Page 61...
  • Page 62 Head winds cause sound to take a curved path upwards due to the slower resultant speed of sound at altitude (see above). This can create a shadow region where high-mid and HF levels will be significantly attenuated. Arcline 8/212 User Guide V1.0 Page 62...
  • Page 63 Omnidirectional noise sources may act quite differently. For example, the above tail wind could cause upwards propagation to diffract “up and over” in a large arc, increasing off-site leakage instead of decreasing it. Arcline 8/212 User Guide V1.0 Page 63...
  • Page 64 Change of direction (degrees) = tan (0.03239) = 1.855° A mix position at 50 m will experience sound shifting 50 m x (speed of side gust/speed of sound) = approximately 1.62 m to the right. Arcline 8/212 User Guide V1.0 Page 64...
  • Page 65 Make sure you design large-scale sound systems to provide 10-15% extra depth and width coverage as a contingency. Arcline 8/212 User Guide V1.0 Page 65...

  • Page 66: Appendix B - Accessories

    12 Appendix B - Accessories Arcline 8 fly frame / ground stack frame (product number IT1837) • Frame to fly Arcline 8 - or to stack on flat surface when inverted Arcline 8 flight case (product number IT1198) • Flight case for Arcline 8 •...

  • Page 67: Appendix C - Connectors And Cabling

    XLR AES 32-channel digital audio cable connector (Use V9 IN2 socket) Note For AES3 2-channel digital audio signals via a 110 Ω twisted pair cable, XLR pins 2 & 3 polarity is unimportant. Arcline 8/212 User Guide V1.0 Page 67...
  • Page 68 (1 & 2 - orange, 3 & 6 - green, 4 & 5 - blue, 7 & 8 - brown). Ignoring this pairing will defeat the cable’s common mode rejection and will degrade performance. Arcline 8/212 User Guide V1.0 Page 68...

  • Page 69: Appendix D - Architectural Specifications

    (one per side) for efficient manual handling. External dimensions of (H) 285 mm x (W) 881 mm x (D) 470 mm (11.2” x 34.7” x 18.5”). Weight shall be 39 kg (86 lbs). The loudspeaker system shall be a Void Acoustics Arcline 8. Arcline 8/212 User Guide V1.0...
  • Page 70 (H) 367 mm x (W) 877.5 mm x (D) 470 mm (14.4” x 34.5” x 18.5”). Weight shall be 42 kg (92.6 lbs). The loudspeaker system shall be a Void Acoustics Arcline 212. Arcline 8/212 User Guide V1.0...
  • Page 72 North America Void Acoustics North America 503-854-7134 sales.usa@voidacoustics.com Head Office Void Acoustics Research Ltd Unit 15 Dawkins Road Industrial Estate Poole Dorset BH15 4JY England +44 (0) 1202 666 006 info@voidacoustics.com Registered in England & Wales No. 07533536 www.voidacoustics.com...

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