Pure Acoustics SUB-80 Spécifications

Version 3.0 June 2005 dV-DOSC dV-SUB OPERATOR MANUAL

dV-DOSC dV-SUB Manual V3.0 June 2005 10 Figure 1: Wavefield interference for a conventional sound reinforcement system compared to a sculp

dV-DOSC dV-SUB Manual V3.0 June 2005 100 Stacking on top of V-DOSC For dV-DOSC upfill applications, dV-BUMP is attached to the V-DOSC bumpe

dV-DOSC dV-SUB Manual V3.0 June 2005 101 (i) dV-BUMP and V-DOSC BUMPER (ii) Raise and level the V-DOSC BUMPER (iii) Place dV-BUMP inside

dV-DOSC dV-SUB Manual V3.0 June 2005 102 (v) Attach rear dV-ANGLE and mount the first enclosure (vi) Continue to build the stack (vii) N

dV-DOSC dV-SUB Manual V3.0 June 2005 103 Stacking on top of SB218 Subwoofers For this application, four circular pads are provided on dV-BU

dV-DOSC dV-SUB Manual V3.0 June 2005 104 (i) Note circular discs on dV-BUMP (ii) These mate with stacking runner recesses on SB218 (iii)

dV-DOSC dV-SUB Manual V3.0 June 2005 105 (v) Ratchet strap secures dV-BUMP to the SB218 (vi) Rear dV-ANGLE pre-attached at desired angle

dV-DOSC dV-SUB Manual V3.0 June 2005 106 (ix) Second dV-DOSC placed into position (x) then secured using dV-PIN25 (front first then rear)

dV-DOSC dV-SUB Manual V3.0 June 2005 107 Stacking dV-SUB Subwoofers When stacking dV-SUB, the stacking runners on the bottom of enclosures

dV-DOSC dV-SUB Manual V3.0 June 2005 108 Repeat the same procedure to stack 3 dV-SUBs high The stack - secured using 8 dV-ANGLESS and 16

dV-DOSC dV-SUB Manual V3.0 June 2005 109 Stacking dV-DOSC on top of dV-SUBS There are two options for stacking dV-DOSC: with, or without dV

dV-DOSC dV-SUB Manual V3.0 June 2005 11 Figure 2: Wavefront Sculpture Technology Criteria 1 and 2 Additional conditions were published in t

dV-DOSC dV-SUB Manual V3.0 June 2005 110 (i) Pre-attach dV-ANGLESD (front) and dV-ANGLESDP (rear) to dV-SUB (ii) Note: The ''fa

dV-DOSC dV-SUB Manual V3.0 June 2005 111 (v) Pre-select the angle / pre-attach dV-ANGLE P1 or P2 for the second dV-DOSC enclosures and co

dV-DOSC dV-SUB Manual V3.0 June 2005 112 Procedure 2: Stacking with dV-BUMP or dV-BUMP2 In this case, dV-BUMP or dV-BUMP2 is placed on top

dV-DOSC dV-SUB Manual V3.0 June 2005 113 (i) dV-BUMP secured to dV-SUB stack using a ratchet strap. dV-ANGLEN preinstalled for rear attach

dV-DOSC dV-SUB Manual V3.0 June 2005 114 4.2 FLOWN SYSTEMS Standalone Rigging with dV-BUMP or dV-BUMP2 Flying a dV-DOSC array is fast and e

dV-DOSC dV-SUB Manual V3.0 June 2005 115 Referring to the angle values that were pre-calculated using ARRAY2004 or SOUNDVISION, pre-attach

dV-DOSC dV-SUB Manual V3.0 June 2005 116 (i) dV-DOSC lined up in FLIGHT-dV cases (ii) Pin the fronts of all dV-DOSC using dV-PIN25 (iii

dV-DOSC dV-SUB Manual V3.0 June 2005 117 (iv) Pre-attach all rear dV-ANGLE (ball/tab end up) (v) Pre-select the desired angle (vi) dV-BU

dV-DOSC dV-SUB Manual V3.0 June 2005 118 (viii) Lower detail between adjacent blocks of 3 dV-DOSC (ix) As cabinets lift off … (x) Pin a

dV-DOSC dV-SUB Manual V3.0 June 2005 119 (xi) Note: single point hang from spreader bar section on dV-BUMP (xii) Front view of the flown

dV-DOSC dV-SUB Manual V3.0 June 2005 12 First V-DOSC, Now dV-DOSC V-DOSC is the first loudspeaker system designed based on the principles of

dV-DOSC dV-SUB Manual V3.0 June 2005 120 Trim and Angle Adjustments At this point there are only two adjustments left - trim height of the

dV-DOSC dV-SUB Manual V3.0 June 2005 121 Under daylight conditions (outdoors), the trim angle can be visually checked from the rearmost aud

dV-DOSC dV-SUB Manual V3.0 June 2005 122 Once flown, there will be a gap between dV-DOSC and the bottom V-DOSC enclosure. To remove this ga

dV-DOSC dV-SUB Manual V3.0 June 2005 123 (v) Attach dV-DOWN using U-PIN and locking safety (vi) Preconnect all dV-ANGLE at the rear of dV

dV-DOSC dV-SUB Manual V3.0 June 2005 124 (ix) Raise the ARRAY - note the gap (x) Tighten screwjacks to remove this gap (xi) dV-DOSC flo

Rigging dV-SUB Standalone When rigging dV-SUB standalone, up to 6 enclosures deep can be flown from dV-BUMP or dV-BUMP2 (single or two point hang). P

Lower 1st dV-SUB into position and attach using 4 dV-PIN25 Figure 85: Rigging dV-SUB Standalone

Rigging dV-DOSC Under dV-SUB (3+1 configuration) When rigging small configurations of dV-DOSC under a single dV-SUB (e.g., 1 dV-SUB with 3 dV-DOSC un

dV-DOSC dV-SUB Manual V3.0 June 2005 128 Connect the front and rear motors (or single motor) to dV-BUMP. Slowly begin to raise the array.

(v) Attach rear points only (dV-SUB to dV-DOSC) (vi) Houston - we have liftoff… (vii) Lift dV-DOSC into position, secure front points using 2 x dV

dV-DOSC dV-SUB Manual V3.0 June 2005 13 The internationally patented1 DOSC waveguide is the core technology contained in dV-DOSC. Essentiall

Rigging dV-DOSC Under dV-SUB (larger configurations) When rigging larger configurations of dV-DOSC under dV-SUB (e.g., 2 dV-SUB with 6 dV-DOSC undern

dV-DOSC dV-SUB Manual V3.0 June 2005 131 Connect all enclosures to the AMP RACKS using appropriate cables and adaptors (SP and DO2W or DO p

(i) dV-SUB with dV-BUMP attached using 4 x dV-ANGLESD and 8 dV-PIN25 (ii) Second dV-SUB with 4 x dV-ANGLESS pre-attached (iii) 2 x dV-SUB physical

dV-DOSC dV-SUB Manual V3.0 June 2005 133 (v) Preconnect the first dV-DOSC to dV-SUB, front and rear. (Do not attach the dV-DOSC #2 to dV-D

dV-DOSC dV-SUB Manual V3.0 June 2005 134 (i) dV-DOSC are pre-attached in blocks of 3 (ii) Flip dV-DOSC onto dV-SUB dolleys to position u

dV-DOSC dV-SUB Manual V3.0 June 2005 135 (v) The procedure is repeated for subsequent blocks of 3 dV-DOSC Figure 88: Rigging dV-DOSC unde

SAFETY RULES CAUTION: PLEASE FOLLOW THE GUIDELINES BELOW WHEN FLYING dV-DOSC AND dV-SUB dV-BUMP OR dV-BUMP2 ONLY (SINGLE OR TWO POINT HANG FROM CENT

dV-DOSC dV-SUB Manual V3.0 June 2005 137 5. MAINTENANCE AND INSTALLATION TOOLS 5.1 RECOMMENDED MAINTENANCE PROCEDURES Regular maintenance p

dV-DOSC dV-SUB Manual V3.0 June 2005 138 5.4 RECOMMENDED INSTALLATION TOOLS FOR SYSTEM FOCUS Digital Inclinometers  Handheld : Digital

dV-DOSC dV-SUB Manual V3.0 June 2005 139 6. SPECIFICATIONS 6.1 dV-DOSC SPECIFICATIONS L-ACOUSTICS specifications are based on measurement p

dV-DOSC dV-SUB Manual V3.0 June 2005 14 Figure 3: Cylindrical versus spherical wave propagation Aside: Conventional modeling techniques can

dV-DOSC dV-SUB Manual V3.0 June 2005 140 Figure 90: dV-DOSC Enclosure – Line Drawing Number of Cabinet Cabinet dV-DOSC Weight Weight

dV-DOSC dV-SUB Manual V3.0 June 2005 141 dV-BUMP Net Weight: 22.5 kg without extension bar (49.6 lbs) 32.0 kg with extension bar (

dV-DOSC dV-SUB Manual V3.0 June 2005 142 6.2 dV-SUB SPECIFICATIONS Frequency response (+/-3 dB) 40 - 200 Hz Usable bandwidth

dV-DOSC dV-SUB Manual V3.0 June 2005 143 Figure 92: dV-SUB Line Drawing

dV-DOSC dV-SUB Manual V3.0 June 2005 144 APPENDIX 1: HOW DOES dV-DOSC BEHAVE WITH RESPECT TO WST CRITERIA The second Wavefront Sculpture T

dV-DOSC dV-SUB Manual V3.0 June 2005 145 APPENDIX 2: HOW DOES THE DOSC WAVEGUIDE WORK? The DOSC waveguide is the result of careful analysi

dV-DOSC dV-SUB Manual V3.0 June 2005 147

dV-DOSC dV-SUB Manual V3.0 June 2005 148

dV-DOSC dV-SUB Manual V3.0 June 2005 149

dV-DOSC dV-SUB Manual V3.0 June 2005 15 Summary of dV-DOSC Applications As a full range two-way system, dV-DOSC can be used for speech reinf

dV-DOSC dV-SUB Manual V3.0 June 2005 150

dV-DOSC dV-SUB Manual V3.0 June 2005 16 dV-DOSC TRAINING AND QUALIFICATIONS V-DOSC and dV-DOSC are innovative systems which are based on a c

dV-DOSC dV-SUB Manual V3.0 June 2005 17 1. THE dV-DOSC SYSTEM STANDARD dV-DOSC is a complete, self-contained FOH sound reinforcement system

Figure 5: dV-DOSC 3-way system configuration

dV-DOSC dV-SUB Manual V3.0 June 2005 19 Figure 6a: dV-DOSC 4-way system configuration (option 1 COMB connector / cabling)

dV-DOSC dV-SUB Manual V3.0 June 2005 20 Figure 6b: dV-DOSC 4-way system configuration (option 2 COMB connector / cabling)

dV-DOSC dV-SUB Manual V3.0 June 2005 21 1.1 dV-DOSC SYSTEM COMPONENTS LOUDSPEAKER ENCLOSURES dV-DOSC Active 2-way loudspeaker enclosure, mee

dV-DOSC dV-SUB Manual V3.0 June 2005 22 dV-ANGLEP1, dV-ANGLEP2 Rear angle bar used to form convex (positive curvature) arrays. Available ang

dV-DOSC dV-SUB Manual V3.0 June 2005 23 SUBWOOFER ENCLOSURES dV-SUB Dual-vented bandpass-loaded, triple 15” subwoofer for high SPL, low freq

dV-DOSC dV-SUB Manual V3.0 June 2005 24 SUBWOOFER RIGGING ACCESSORIES BUMPSUB Flying bar for rigging up to eight SB218 enclosures deep in a

dV-DOSC dV-SUB Manual V3.0 June 2005 25 AMPLIFIER RACKS RK12U 12 rack unit amplifier rack (empty). Light-weight aluminum space frame constru

dV-DOSC dV-SUB Manual V3.0 June 2005 26 RK12U PADOSEC RK122a PADO2a COMB CONNECTOR RK124a PADO4a Figure 12: Amplifier Rack

dV-DOSC dV-SUB Manual V3.0 June 2005 27 SIGNAL DISTRIBUTION AND CABLING CO6 CONTROL OUTPUT PANEL Control Output Panel for use with a single

dV-DOSC dV-SUB Manual V3.0 June 2005 28 CO24 CONTROL OUTPUT MD24 MULTI DISTRO CO6 CONTROL OUTPUT MC28100 MULTI DOM30 CROSS LINK DO

dV-DOSC dV-SUB Manual V3.0 June 2005 29 LOUDSPEAKER CABLING DO7 Loudspeaker cable, 8 conductor, 4 mm2 conductor cross-section, 7 m (20 ft)

dV-DOSC dV-SUB Manual V3.0 June 2005 3 FOREWORD This manual is intended for sound engineers who are responsible for the installation and ope

dV-DOSC dV-SUB Manual V3.0 June 2005 30 DO10P EXTENSION DOSUB CABLE SP7 SP25 CC4FP SP.7 DOFILL DO3WFILL DO2W DO3W Figure 14: Lo

dV-DOSC dV-SUB Manual V3.0 June 2005 31 1.2 dV-DOSC SPECIFICATIONS Figure 15: dV-DOSC Enclosure - Front and Rear Views dV-DOSC contains two

dV-DOSC dV-SUB Manual V3.0 June 2005 32 1.3 dV-DOSC RIGGING SYSTEM dV-DOSC features a convenient rigging system where rear mounted angle bar

dV-DOSC dV-SUB Manual V3.0 June 2005 33 Figure 18: dV-BUMP and dV-BUMP2 rigging bumpers Maximum recommended flown configurations are summa

dV-DOSC dV-SUB Manual V3.0 June 2005 34 1.4 dV-SUB ENCLOSURE DESCRIPTION Figure 20: dV-SUB dV-SUB contains three 15'' loudspeaker

dV-DOSC dV-SUB Manual V3.0 June 2005 35 1.5 dV-SUB RIGGING SYSTEM dV-SUB features two sets of recessed side panels on each side of the enclo

dV-DOSC dV-SUB Manual V3.0 June 2005 36 dV-SUB rigging is compatible with dV-BUMP and dV-BUMP2 and the rigging system is rated for up to 6 d

dV-DOSC dV-SUB Manual V3.0 June 2005 37 1.6 POWERING dV-DOSC L-ACOUSTICS LA24a or LA48a power amplifiers are specified for use with dV-DOSC.

dV-DOSC dV-SUB Manual V3.0 June 2005 38 Table 4: L-ACOUSTICS LA24a MLS Settings for use with dV-DOSC MLS SWITCH SETTINGLOAD CONFIGURATION -5

dV-DOSC dV-SUB Manual V3.0 June 2005 39 1.8 dV-DOSC AMP PANELS Figure 24: dV-DOSC PADO4a Amplifier Rack Panel The PADO4a amp panel allows

dV-DOSC dV-SUB Manual V3.0 June 2005 4 TABLE OF CONTENTS INTRODUCTION ...

dV-DOSC dV-SUB Manual V3.0 June 2005 40 Table 9: PADO4a COMB Wiring Chart Table 10: PADO4a Internal Amp Rack Wiring Chart Figure 26: PADO

dV-DOSC dV-SUB Manual V3.0 June 2005 41 Table 11: PADO2a COMB Wiring Chart Table 12: PADO2a Internal Amp Rack Wiring Chart Figure 27: PA

dV-DOSC dV-SUB Manual V3.0 June 2005 42 1.9 dV-DOSC AMPLIFIER RACKS Figure 28: L-ACOUSTICS AMP RACK RK12-4 The L-ACOUSTICS RK12U amplifier

dV-DOSC dV-SUB Manual V3.0 June 2005 43 4 x LA48a plus PADO4a 4 x LA48a plus 2 x PADO2a Master Rack Slave Rack Figure 29: L-AC

dV-DOSC dV-SUB Manual V3.0 June 2005 44 1.10 COMB CONNECTORS COMB connectors are used in conjunction with L-ACOUSTICS signal distribution pa

dV-DOSC dV-SUB Manual V3.0 June 2005 45 Table 13b: dV-DOSC DSP output channel assignment and COMB connector summary (4+2 format presets) DSP

dV-DOSC dV-SUB Manual V3.0 June 2005 46 To power 2-way fill enclosures or 3-way stereo dV-DOSC, ARCS or XT systems using PADO2a and PADO4a a

dV-DOSC dV-SUB Manual V3.0 June 2005 47 Operating modes, amplifier rack channel assignments and cabling plus loudspeaker enclosure combinati

dV-DOSC dV-SUB Manual V3.0 June 2005 48 1.11 CO24 CONTROL OUTPUT PANEL Figure 36: CO24 Control Output Panel The CO24 control output panel

dV-DOSC dV-SUB Manual V3.0 June 2005 49 1.12 MD24 MULTI DISTRO PANEL Figure 37: MD24 Multi Distro Panel The MD24 Multi Distro panel is us

dV-DOSC dV-SUB Manual V3.0 June 2005 5 Optimization Procedure...

dV-DOSC dV-SUB Manual V3.0 June 2005 50 1.14 APPROVED DIGITAL SIGNAL PROCESSORS Digital signal processing units supported by L-ACOUSTICS for

dV-DOSC dV-SUB Manual V3.0 June 2005 51 1.16 dV-DOSC PRESETS dV-DOSC presets are provided in LO and HI versions with differing amounts of H

dV-DOSC dV-SUB Manual V3.0 June 2005 52 Stereo 3-way presets are also provided for dV-DOSC plus L-ACOUSTICS SB118 (single 18'') a

dV-DOSC dV-SUB Manual V3.0 June 2005 53 dV 3W SB118 (120 Hz crossover between SB118 and dV-DOSC low section) dV 3WX SB118 (80 Hz crossove

dV-DOSC dV-SUB Manual V3.0 June 2005 54 dV-DOSC + dV-SUB + SB118 INFRA (60 Hz crossover between SB118 and dV-SUB) dV-DOSC + dV-SUB + SB118

dV-DOSC dV-SUB Manual V3.0 June 2005 55 General Guidelines Regarding System Protection Standard limiter thresholds for dV-DOSC are based on

PRESET NAME PGM TYPE MEM OUT 1 (Source) OUT 2 (Source) OUT 3 (Source) OUT 4 (Source)dV-DOSC 2W 80 LO2-way stereo 10 dV-DOSC LO (A) dV-DOSC HI (A)

dV-DOSC dV-SUB Manual V3.0 June 2005 57 PRESET NAME PGM TYPE MEM OUT 1 (Source) OUT 2 (Source) OUT 3 (Source) OUT 4 (Source) OUT 5 (Sou

dV-DOSC dV-SUB Manual V3.0 June 2005 58 PRESET NAME PGM TYPE Mem OUT 1 (Source) OUT 2 (Source) OUT 3 (Source) OUT 4 (Source) OUT 5 (Sou

OUT 1 (Source) OUT 2 (Source) OUT 3 (Source) OUT 4 (Source) OUT 5 (Source) OUT 6 (Source)2-WAY MODULESdV-DOSC 2W 80 LO dV-DOSC LO (A) dV-DOSC HI

dV-DOSC dV-SUB Manual V3.0 June 2005 6 5. MAINTENANCE AND INSTALLATION TOOLS ...

dV-DOSC dV-SUB Manual V3.0 June 2005 60 2. dV-DOSC ARRAY SPECIFICATIONS dV-DOSC can be modelled using L-ACOUSTICS proprietary SOUNDVISION o

dV-DOSC dV-SUB Manual V3.0 June 2005 61 2.2 WAVEFRONT SCULPTURE IN THE VERTICAL PLANE Flat dV-DOSC Array Flying or stacking dV-DOSC with 0

dV-DOSC dV-SUB Manual V3.0 June 2005 62 Constant Curvature dV-DOSC Array For a constant curvature array, the vertical directivity is nomina

dV-DOSC dV-SUB Manual V3.0 June 2005 63 2.3 COVERAGE PREDICTIONS USING ARRAY2004 L-ACOUSTICS has developed a fast, easy-to-use prediction s

dV-DOSC dV-SUB Manual V3.0 June 2005 64 Figure 43: Defining Cutview Dimensions Although detailed blueprints are not necessarily required,

dV-DOSC dV-SUB Manual V3.0 June 2005 65 In dV-DOSC ARRAY#1 or dV-DOSC ARRAY#2 cells, the designer enters the number of dV-DOSC enclosures (

dV-DOSC dV-SUB Manual V3.0 June 2005 66 Optimization Procedure After entering all input data (as described above), press the SCALING button

dV-DOSC dV-SUB Manual V3.0 June 2005 67 dV-DOSC Single Point Hang Utility A pick point calculation utility is included for single point dV-

dV-DOSC dV-SUB Manual V3.0 June 2005 68 dV-DOSC Downfill / Upfill Simulation dV-DOSC downfill or upfill enclosures can be conveniently simu

dV-DOSC dV-SUB Manual V3.0 June 2005 69 Figure 50: dV-DOSC downfill simulation (circuiting issues) For dV-DOSC upfill simulation, an aut

dV-DOSC dV-SUB Manual V3.0 June 2005 7 Figure 42: Horizontal dV-DOSC isocontour...

dV-DOSC dV-SUB Manual V3.0 June 2005 70 Output Data In the columns adjacent to where angle values are entered, the site angles (i.e., what

dV-DOSC dV-SUB Manual V3.0 June 2005 71 Figure 52: dV-DOSC mechanical data H-ISOCONT SHEET The H-ISOCONT sheet is used to check horizontal

dV-DOSC dV-SUB Manual V3.0 June 2005 72 The user can also define the y coordinates for each array (off-center distance) and the azimuth ang

dV-DOSC dV-SUB Manual V3.0 June 2005 73 CUTVIEW SHEET HORIZONTAL ISOCONTOUR SHEET Figure 54: ARRAY 2004 spreadsheet calculation example

dV-DOSC dV-SUB Manual V3.0 June 2005 74 2.4 dV-DOSC COVERAGE MODELING USING SOUNDVISION SOUNDVISION is a proprietary 3D software program de

250 Hz 4 kHz 500 Hz 6.3 kHz 1 kHz 8 kHz 2 kHz 10 kHz Figure 55: Plan view SPL mappings at octave band frequencies for 12 dV-DOSC (30 metre t

Impact Coverage Unweighted SPL Map A Weighted SPL Map 1-10 kHz SPL Map Figure 56: Impact coverage and SPL mappings (unweighted, A-weighted, 1-10

dV-DOSC dV-SUB Manual V3.0 June 2005 77 3. SOUND DESIGN 3.1 STACKED OR FLOWN? Although flown systems are generally preferred, there are goo

dV-DOSC dV-SUB Manual V3.0 June 2005 78 Stacking Guidelines The stacking system is rated for a maximum of 12 dV-DOSC enclosures For stacked

dV-DOSC dV-SUB Manual V3.0 June 2005 79 Rigging Guidelines The rigging system is rated for a maximum of 24 dV-DOSC enclosures without the e

dV-DOSC dV-SUB Manual V3.0 June 2005 8 LIST OF TABLES Table 1: Maximum rated dV-SUB / dV-DOSC combinations - with extension bar ...

dV-DOSC dV-SUB Manual V3.0 June 2005 80 3.2 ACHIEVING OPTIMUM COVERAGE ARRAY 2004 or SOUNDVISION are convenient simulation tools for optimi

dV-DOSC dV-SUB Manual V3.0 June 2005 81 Tradeoffs Between Intelligibility and Stereo Imaging The left/right configuration has the advantage

dV-DOSC dV-SUB Manual V3.0 June 2005 82 3.2.2 LEFT/CENTRE/RIGHT (LCR) CONFIGURATIONS Although it can be sometimes difficult to negotiate th

dV-DOSC dV-SUB Manual V3.0 June 2005 83 3.3 MULTIPLE ARRAY CONCEPTS When the horizontal coverage of a dV-DOSC array (120° nominal, 100° eff

dV-DOSC dV-SUB Manual V3.0 June 2005 84 3.4 SUBWOOFERS dV-DOSC is capable of radiating frequencies down to 80 Hz with good vertical directi

dV-DOSC dV-SUB Manual V3.0 June 2005 85 3.4.1 Flown dV-DOSC, Ground Stacked SB Subwoofers (3-way system operation) SB218 or SB118 subwoofer

dV-DOSC dV-SUB Manual V3.0 June 2005 86 3.4.2 Physically Coupled dV-SUB/dV-DOSC (3-way system operation) dV-SUBs can be physically coupled

dV-DOSC dV-SUB Manual V3.0 June 2005 87 The benefits of flown subwoofers include: • Improved low frequency summation, impact and throw. •

dV-DOSC dV-SUB Manual V3.0 June 2005 88 3.4.3 Hybrid Flown/Ground Stacked Subwoofers (4-way system operation) (a) Flown dV-SUB, ground sta

dV-DOSC dV-SUB Manual V3.0 June 2005 89 3.4.4 Time Alignment: Flown/Ground Stacked Subwoofers As seen in Fig. 64, selection of the time ali

dV-DOSC dV-SUB Manual V3.0 June 2005 9 INTRODUCTION The small ''d'' in dV-DOSC refers to the mathematical terminology fo

dV-DOSC dV-SUB Manual V3.0 June 2005 90 section operating bandwidths, i.e., the 24 dB per octave low pass filter for the SB218 or SB118 ge

dV-DOSC dV-SUB Manual V3.0 June 2005 91 3.5 SUBWOOFER ARRAYING TECHNIQUES 3.5.1 LEFT/RIGHT CONFIGURATIONS Any L/R subwoofer configuration w

dV-DOSC dV-SUB Manual V3.0 June 2005 92 (a) Minimum front surface area L/R ground stacked subwoofer array blocks (b) Vertical column L/R

dV-DOSC dV-SUB Manual V3.0 June 2005 93 3.5.2 CENTRAL LINE ARRAY WITH ELECTRONIC DELAY PROCESSING A central ground stacked line array optim

dV-DOSC dV-SUB Manual V3.0 June 2005 94 An EXCEL spreadsheet tool to perform delay and offset calculations is available in ARRAY2004 (SUB A

dV-DOSC dV-SUB Manual V3.0 June 2005 95 applicable, time align LL and RR to L and R, respectively, using a measurement location in a repres

dV-DOSC dV-SUB Manual V3.0 June 2005 96 4. INSTALLATION PROCEDURES In the following sections, detailed procedures for stacking or rigging d

dV-DOSC dV-SUB Manual V3.0 June 2005 97 four dV-PIN25 (front first, rear last) to secure the bottom dV-DOSC to dV-BUMP. Verify the tilt ang

dV-DOSC dV-SUB Manual V3.0 June 2005 98 (i) Place V-DOSC bumper into position (ii) dV-BUMP locator studs mate with holes (iii) dV-BUMP

dV-DOSC dV-SUB Manual V3.0 June 2005 99 (ix) dV-ANGLE pre-attached in the 3.75 degree position (x) Front rigging tabs mate with locator