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L-Acoustics SB18 IIi, Owner'S Manual

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L-Acoustics SB18 IIi Owner'S Manual Download Page 8

System components

System components

Loudspeaker enclosures

SB18 IIi

High power compact subwoofer: 1 x 18" (installation version)

Powering and driving system

LA2Xi / LA4X / LA8 /

LA12X

Amplied controller with DSP, preset library and networking capabilities

Refer to the  LA2Xi / LA4X / LA8 / LA12X  owner's manual for operating instructions.

Loudspeaker cables

speaker cable

2.5 mm

2

 cable

Speaker cable used to connect enclosures in parallel. Adapt the cable length to the installation.

custom 4-point

speakON cable

4-point speakON cable (2.5 mm

2

 gauge) to bare wire cable

This cable needs to be custom made.

Information about the connection of the enclosures to the LA amplied controllers is given in

this document.

Refer to the  LA2Xi / LA4X / LA8 / LA12X  owner's manual for detailed instructions about the whole cabling

scheme, including modulation cables and network.

Rigging elements

KARAIIi-BUMP

Flying frame for vertical deployment of Kara IIi and SB18 IIi

KARAIIi-RIGBAR

Rigging bar and pullback for Kara IIi and SB18 IIi

M-BARi

Extension bar for rigging frame (installation version)

SB18IIi-LINK

Rigging plates for SB18 IIi

SB18IIi-ENDLINK

End rigging plates for SB18 IIi

KARAIIi-FIXBRACKET

Fastening brackets for Kara IIi and SB18 IIi

CLAMP250

Clamp certied for 250 kg

Transportation accessories

SB18IIi-SCREEN

Acoustically transparent front screen for SB18 IIi

Software applications

Soundvision

3D acoustical and mechanical modeling software

LA Network Manager Software for remote control and monitoring of amplied controllers

Refer to the 

 Soundvision 

 help.

Refer to the 

 LA Network Manager 

 help.

8 

 SB18 IIi owner's manual (EN) version 1.0

Summary of Contents for SB18 IIi

Page 1: ...SB18 IIi owner s manual EN ...

Page 2: ... s manual EN version 1 0 Distribution date March 30 2021 2021 L Acoustics All rights reserved No part of this publication may be reproduced or transmitted in any form or by any means without the express written consent of the publisher ...

Page 3: ...AIIi BUMP 12 KARAIIi RIGBAR 13 M BARi 16 KARAIIi FIXBRACKET 17 Front screens 18 Mechanical safety 21 Loudspeaker con gurations 23 SB18 IIi in standard con guration 23 SB18 IIi in cardioid con guration 24 Rigging procedures 25 General principles 25 Flying 26 Flying an array with KARAIIi BUMP 26 Flying an array with KARAIIi RIGBAR 31 Adding a pullback with KARAIIi RIGBAR 33 Ceiling mounting 35 Mount...

Page 4: ...to LA ampli ed controllers 46 Cabling schemes 47 Corrective maintenance 49 Introduction 49 Tools 49 SB18 IIi 50 Speci cations 57 APPENDIX A Recommendation for speaker cables 63 APPENDIX B Speci cations for custom rigging systems 64 4 ...

Page 5: ...e familiar with the rigging techniques and safety recommendations outlined in this manual Ensure personnel health and safety During installation and set up personnel must wear protective headgear and footwear at all times Under no circumstances is personnel allowed to climb on a loudspeaker assembly Respect the Working Load Limit WLL of third party equipment L Acoustics is not responsible for any ...

Page 6: ...notice Check www l acoustics com on a regular basis to download the latest document and software updates Long term exposure to extreme conditions may damage the product For more information refer to the Products weather protection document available on the website Read the maintenance section of this document before servicing the product Contact L Acoustics for advanced maintenance Any unauthorize...

Page 7: ...igging the system perform mandatory inspections and functional checks 4 To deploy the system follow the step by step rigging instructions and refer to the cabling schemes Rigging procedures p 25 Connection to LA ampli ed controllers p 46 The Corrective maintenance p 49 section contains the operations authorized for the end user Performing another operation exposes to hazardous situations For advan...

Page 8: ...LA2Xi LA4X LA8 LA12X owner s manual for detailed instructions about the whole cabling scheme including modulation cables and network Rigging elements KARAIIi BUMP Flying frame for vertical deployment of Kara IIi and SB18 IIi KARAIIi RIGBAR Rigging bar and pullback for Kara IIi and SB18 IIi M BARi Extension bar for rigging frame installation version SB18IIi LINK Rigging plates for SB18 IIi SB18IIi ...

Page 9: ...cable needs to be custom made Rigging elements CLAMP250 M BARi KARAIIi RIGBAR KARAIIi BUMP SB18IIi SCREEN Rigging plates x2 x2 x2 SB18IIi LINK Rigging plates for SB18 IIi SB18IIi ENDLINK End rigging plates for SB18 IIi KARAIIi FIXBRACKET Fastening brackets for Kara IIi and SB18 IIi SB18 IIi owner s manual EN version 1 0 9 ...

Page 10: ...N OUT 4 SB IN A 0 dB 0 ms ON SB18_60_C SB18_100_C SB18_60_Cx SB18_100_Cx loudspeaker elements outputs channels routing gain delay polarity mute SR OUT 1 SR ON SB OUT 2 SB ON SB OUT 3 SB ON SB OUT 4 SB IN A 0 dB 0 ms ON Connectors SB18 IIi 1 4 point terminal block with push in connection Internal pinout for L Acoustics subwoofers terminal block points IN IN Transducer connectors LF LF 10 SB18 IIi o...

Page 11: ...igging plates SB18IIi ENDLINK SB18 IIi features ten M6 inserts on each side Six M6 inserts for rigging Four M6 inserts for securing a screen in standard or cardioid con gurations Refer to Securing a screen p 44 The inserts are tted with placeholder screws Rigging screws Only use the rigging screws provided by L Acoustics Do not use the placeholder screws for rigging SB18 IIi owner s manual EN vers...

Page 12: ...ace to avoid leaks Rigging elements KARAIIi BUMP KARAIIi BUMP is a rigging frame for ying arrays of SB18 IIi KARAIIi BUMP can be used as the main lifting accessory for ying vertical arrays of SB18 IIi with one or two lifting points 12 SB18 IIi owner s manual EN version 1 0 ...

Page 13: ... for site angle adjustment They are compatible with Ø19 mm shackles WLL 3 25 t two provided Four holes are available to secure M BARi in position A or B to provide additional pickup points Refer to M BARi p 16 FRONT A B A B 1 2 4 3 5 6 7 8 9 KARAIIi RIGBAR KARAIIi RIGBAR is a rigging bar for pullback con gurations of SB18 IIi arrays SB18 IIi owner s manual EN version 1 0 13 ...

Page 14: ...as a pullback with another KARAIIi RIGBAR as the main lifting accessory With KARAIIi RIGBAR as the main lifting accessory SB18IIi ENDLINK is required on the top enclosure KARAIIi RIGBAR can be secured at the front for an initial positive site angle 14 SB18 IIi owner s manual EN version 1 0 ...

Page 15: ...king Load Limit of 250 kg 550 lb It can support an array of up to 5 SB18 IIi For an hybrid array check the total weight of the array in Soundvision For more information refer to the CLAMP250 owner s manual When using KARAIIi RIGBAR as the main lifting accessory always implement a secondary safety using available holes One pickup point pickup point safety points Two pickup points safety point picku...

Page 16: ...or rear extension with two possible positions each A or B rigging axes front extension in position B M BARi is secured to the rigging frame with two M8 bolts nuts and safety pins 13 mm Seventeen 17 pickup points are available They are compatible with Ø19 mm shackles WLL 3 25 t two provided 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 0 16 SB18 IIi owner s manual EN version 1 0 ...

Page 17: ... is a set of four fastening brackets for SB18 IIi The enclosure is secured to KARAIIi FIXBRACKET using the slotted hole Secure KARAIIi FIXBRACKET at the bottom of an array to improve stability and to anchor it to the ground SB18 IIi owner s manual EN version 1 0 17 ...

Page 18: ...e supporting xture with four M10 screws Fasteners for ceiling mounting Select screw length and anchors applicable to the ceiling properties Model the array in Soundvision and check the loads on rigging in the Mechanics view Front screens SB18IIi SCREEN is an acoustically transparent front screen for SB18 IIi 18 SB18 IIi owner s manual EN version 1 0 ...

Page 19: ...g plates with four M6 35 Torx screws which replace the grill screws The grill screws can be removed through the rigging plates The screens are equipped with tabs to hold the grill in place when securing the screen on the enclosure SB18 IIi owner s manual EN version 1 0 19 ...

Page 20: ...ystem description SB18IIi SCREEN can be secured to the back of SB18 IIi when used in cardioid con guration The cable s can be passed through a cutout on the screen side 20 SB18 IIi owner s manual EN version 1 0 ...

Page 21: ...4 6 Ceiling mounted KARAIIi FIXBRACKET rigging plates 2 Other con gurations For other con gurations respect the recommended maximum limit for optimal stability SB18 IIi con guration rigging accessory safe maximum limit Stacked KARAIIi FIXBRACKET optional rigging plates 4 Assessing mechanical safety Mechanical safety of the rigging system Before any installation always model the system in Soundvisi...

Page 22: ... beyond the recommended safety level Safety of ground stacked arrays in Soundvision For ground stacked arrays a distinct stability warning is implemented in Soundvision It indicates a tipping hazard when the array is not secured to the ground stage or platform It is the user s responsibility to secure the array and to ignore the warning Additional safety for own arrays When ying an array use avail...

Page 23: ...limit at 60 Hz and 100 Hz respectively in order to optimize the acoustic coupling with a main full range system The SB18 IIi subwoofer is driven by the LA2Xi LA4X LA8 LA12X ampli ed controllers Reduced maximum SPL or drive capacity with LA2Xi refer to the LA2Xi owner s manual Preset SB18_60 SB18_100 Low frequency limit 10 dB 32 Hz Delay values When combining a line source with subwoofers delays ma...

Page 24: ...woofer system with an upper frequency limit at 60 Hz and 100 Hz respectively in order to optimize the acoustic coupling with a main full range system The SB18 IIi subwoofer is driven by the LA2Xi LA4X LA8 LA12X ampli ed controllers Reduced maximum SPL or drive capacity with LA2Xi refer to the LA2Xi owner s manual Preset SB18_60_C SB18_60_Cx SB18_100_C SB18_100_Cx Low frequency limit 10 dB 32 Hz De...

Page 25: ... not fully tighten the screws unless instructed to do so After securing an enclosure to another enclosure tighten all the screws on the supporting enclosure Apply a torque of 5 N m Stacking enclosures When stacking two enclosures the top enclosure must be slightly lifted to align the inserts with the rigging plate holes Use an accessory like a wedge or a lever to adjust the height of the enclosure...

Page 26: ...provided Tools torque screwdriver T30 Torx bit 10 mm wrench or 10 mm hex socket 13 mm hex socket and 13 mm wrench for M BARi Min number of operators 3 Rigging plates x2 SB18IIi LINK Rigging plates for SB18 IIi Risk of falling objects Verify that no unattached items remain on the product or assembly Secondary safety Use available holes on the rigging accessories to implement a secondary safety 26 S...

Page 27: ...ure 1 Prepare all SB18 IIi needed for the array a Remove the placeholder screws b Secure SB18IIi LINK on the enclosures Do not secure the bottom screws except on the last enclosure of the array SB18 IIi owner s manual EN version 1 0 27 ...

Page 28: ...ns Tighten all the screws on KARAIIi BUMP Apply a torque of 5 N m T30 10 mm 5 N m 3 Select the pickup point and raise the array FRONT A B A B 1 2 4 3 5 6 7 8 9 KARAIIi BUMP pickup points 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 0 M BARi pickup points 4 Secure a second SB18 IIi under the array a Place SB18 IIi equipped with SB18IIi LINK under the array 28 SB18 IIi owner s manual EN version 1 0 ...

Page 29: ...er the array until the enclosures can be assembled The rigging plates of the bottom enclosure overlap the rigging plates of the top enclosure c Link the enclosures with rigging screws SB18 IIi owner s manual EN version 1 0 29 ...

Page 30: ...que of 5 N m 5 N m e Raise the array 5 Repeat step 4 p 28 until all SB18 IIi are assembled 6 Check that all screws are present and tightened and raise the array What to do next Adding a pullback with KARAIIi RIGBAR p 33 Securing a screen p 44 30 SB18 IIi owner s manual EN version 1 0 ...

Page 31: ...orx bit Min number of operators 3 Rigging plates x2 x2 SB18IIi LINK Rigging plates for SB18 IIi SB18IIi ENDLINK End rigging plates for SB18 IIi Risk of falling objects Verify that no unattached items remain on the product or assembly Secondary safety Use available holes on the rigging accessories to implement a secondary safety Assembly Procedure 1 Prepare the rst enclosure a Remove the relevant p...

Page 32: ...hackle or CLAMP250 to KARAIIi RIGBAR and raise the array Maximum limit with CLAMP250 CLAMP250 has a WLL Working Load Limit of 250 kg 550 lb It can support an array of up to 5 SB18 IIi For an hybrid array check the total weight of the array in Soundvision For more information refer to the CLAMP250 owner s manual 4 To complete the array follow the procedure in Flying an array with KARAIIi BUMP p 26 ...

Page 33: ... bit Min number of operators 1 Assembly Prerequisite Prepare the array as described in Flying an array with KARAIIi RIGBAR p 31 Procedure 1 Raise the array until the bottom enclosure is accessible 2 Remove the bottom screw from the rear rigging plates on each side 3 Secure KARAIIi RIGBAR at the rear of the enclosure with M6 40 Torx screws Apply a torque of 5 N m 5 N m SB18 IIi owner s manual EN ve...

Page 34: ...Rigging procedures 4 Secure a shackle to KARAIIi RIGBAR and lift it with an additional motor 34 SB18 IIi owner s manual EN version 1 0 ...

Page 35: ...s and anchors Tools torque screwdriver T30 Torx bit Min number of operators 3 Rigging plates x2 x2 KARAIIi FIXBRACKET Fastening brackets for Kara IIi and SB18 IIi SB18IIi ENDLINK End rigging plates for SB18 IIi Fasteners for ceiling mounting Select screw length and anchors applicable to the ceiling properties Model the array in Soundvision and check the loads on rigging in the Mechanics view SB18 ...

Page 36: ...or ceiling mounting Select screw length and anchors applicable to the ceiling properties Model the array in Soundvision and check the loads on rigging in the Mechanics view 778 mm 30 6 in 661 mm 26 in Ø 12 mm 0 5 in 2 Prepare an SB18 IIi a Remove the placeholder screws 36 SB18 IIi owner s manual EN version 1 0 ...

Page 37: ...quires three operators Hold the enclosure at the bottom until the rigging plates are secured 3 Lift SB18 IIi and secure it to the slotted holes on KARAIIi FIXBRACKET with rigging screws Apply a 5 N m torque 5 N m 4 Remove the bottom rigging screws from SB18 IIi SB18 IIi owner s manual EN version 1 0 37 ...

Page 38: ...holder screws b Secure SB18IIi LINK on the enclosure This step requires three operators Hold the enclosure at the bottom until the rigging plates are secured 6 Lift SB18 IIi and secure it under the rst one with rigging screws 38 SB18 IIi owner s manual EN version 1 0 ...

Page 39: ...Rigging procedures 7 Tighten all the screws Apply a 5 N m torque 5 N m 8 Check that all screws are secured and tightened What to do next Securing a screen p 44 SB18 IIi owner s manual EN version 1 0 39 ...

Page 40: ...chors Tools torque screwdriver T30 Torx bit Min number of operators 3 Rigging plates x2 x2 KARAIIi FIXBRACKET Fastening brackets for Kara IIi and SB18 IIi SB18IIi ENDLINK End rigging plates for SB18 IIi Fasteners for ceiling mounting Select screw length and anchors applicable to the ceiling properties Model the array in Soundvision and check the loads on rigging in the Mechanics view 40 SB18 IIi o...

Page 41: ...sembly Procedure 1 Secure KARAIIi FIXBRACKET to the ground using M10 screws 778 mm 30 6 in 661 mm 26 in Ø 12 mm 0 5 in 2 Prepare up to four SB18 IIi a Remove the placeholder screws SB18 IIi owner s manual EN version 1 0 41 ...

Page 42: ...On the last enclosure of the array secure SB18IIi ENDLINK instead Risk of crushing injury Keep ngers away from underneath the enclosure 3 Secure SB18 IIi to the slotted holes on KARAIIi FIXBRACKET Tighten the bottom screws Apply a 5 N m torque 5 N m 42 SB18 IIi owner s manual EN version 1 0 ...

Page 43: ... wedge or a lever between the two enclosures to align the rigging with the inserts Be careful not to scratch the paint 5 Repeat step 4 p 43 until the array is completed The last SB18 IIi must be equipped with SB18IIi ENDLINK 6 Tighten all the screws on the array Apply a torque of 5 N m 5 N m 7 Check that all screws are secured and tightened What to do next Securing a screen p 44 SB18 IIi owner s m...

Page 44: ...ns on the enclosures after the array is fully assembled Procedure 1 Remove the grill screws Do not remove the enclosure grills Hold the grills in place until the screens are secured 2 If the enclosure is not equipped with rigging plates standalone ground stacked enclosure stick the washers on the screen xing tabs Risk of bending xing tabs Always use the self sticking washers for securing screens w...

Page 45: ...ure the screen to the enclosure If SB18 IIi is reversed cardioid con guration connect the cables to the enclosure before securing SB18IIi SCREEN Pass the cables through the cutout on the screen side See Connection to LA ampli ed controllers p 46 for cabling instructions SB18 IIi owner s manual EN version 1 0 45 ...

Page 46: ...osures per controller refer to the footnotes LA2Xi LA4X LA8 LA12X per output total per output total per output total per output total SB18 IIi 1 4 SE 1 2 BTL 1 4 2 6 3 12 Reduced maximum SPL or drive capacity with LA2Xi refer to the LA2Xi owner s manual For passive loudspeakers the value corresponds to the number of enclosures in parallel on the output For active loudspeakers the value corresponds...

Page 47: ...mes to connect the enclosures to different types of connectors and output con gurations Refer to the LA2Xi owner s manual for more information on output con gurations Terminal block output SE 1 1 2 2 3 3 4 4 2 5 mm cables Terminal block output BTL 1 1 2 2 3 3 4 4 2 5 mm cables One channel speakON output 1 1 custom cable 2 5 mm cable 1 1 SB18 IIi owner s manual EN version 1 0 47 ...

Page 48: ...Connection to LA ampli ed controllers Two channel speakON output 1 1 2 2 2 5 mm cable custom cable 1 1 2 2 2 5 mm cable 48 SB18 IIi owner s manual EN version 1 0 ...

Page 49: ... 360NANO FACOM Torque screwdriver 2 10 N m A 404 FACOM included in the L Acoustics Maintenance Toolcase Maintenance Toolcase The Maintenance Toolcase is a carry on suitcase that includes all the tools required to perform maintenance on L Acoustics products This toolcase is aimed at Certi ed Providers The Maintenance Toolcase uses a Peli 1510 Protector case that features three pre cut layers of foa...

Page 50: ...exploded view In order to operate follow the order outlined here Each assembly refers to the corresponding Disassembly Reassembly D R procedure and the necessary repair kit GRILL LF SPEAKER KR HPBC182 50 SB18 IIi owner s manual EN version 1 0 ...

Page 51: ...driver T30 Torx bit Repair kit KR HPBC182 KR 18 loudspeaker SB18 i SB18 IIi 14 S221 M6 35 Torx Exploded view For safety reasons always use the new screws and spare parts provided in the KR If no new screws are available use blue threadlocker x4 T30 SB18 IIi owner s manual EN version 1 0 51 ...

Page 52: ...hex bit Repair kit KR HPBC182 KR 18 loudspeaker SB18 i SB18 IIi 1 8 14 4 627 S100054 S221 100689 18 speaker 8 ohms M6 30 hex M6 35 Torx 18 speaker gasket Prerequisite Grill removed See Grill p 51 Disassembly Procedure 1 Remove the plate T30 52 SB18 IIi owner s manual EN version 1 0 ...

Page 53: ...Corrective maintenance 2 Remove the speaker screws 5 mm 3 Remove the speaker from the enclosure and disconnect the speaker cables SB18 IIi owner s manual EN version 1 0 53 ...

Page 54: ...Corrective maintenance 4 If the speaker gaskets are damaged remove and replace them 54 SB18 IIi owner s manual EN version 1 0 ...

Page 55: ...nd spare parts provided in the KR If no new screws are available use blue threadlocker Procedure 1 Connect the speaker cables and position the speaker in the enclosure 2 Secure the speaker Gradually tighten the screws following a star pattern x8 5 N m 5 mm SB18 IIi owner s manual EN version 1 0 55 ...

Page 56: ...Corrective maintenance 3 Secure the plate Gradually tighten the screws following a star pattern x10 T30 56 SB18 IIi owner s manual EN version 1 0 ...

Page 57: ... dual bass re ex Nominal impedance 8 Ω Connectors 1 4 point terminal block with push in connection Rigging and handling external rigging kits 12 M6 inserts for rigging 8 M6 inserts for screens Weight net 48 kg 106 lb Cabinet premium grade Baltic birch plywood Front coated steel grill acoustically neutral 3D fabric Finish dark grey brown Pantone 426 C pure white RAL 9010 custom RAL code on special ...

Page 58: ...Speci cations SB18 IIi dimensions 701 mm 27 6 in 540 mm 21 2 in 701 mm 27 6 in 728 mm 28 7 in 58 SB18 IIi owner s manual EN version 1 0 ...

Page 59: ... M BARi dimensions 60 mm 2 4 in 954 mm 37 6 in 112 mm 4 4 in KARAIIi RIGBAR speci cations Description Rigging bar and pullback for Kara IIi and SB18 IIi 2 Ø12 mm shackles WLL 1 t Weight net 4 8 kg 11 lb Material high grade steel with anti corrosion coating KARAIIi RIGBAR dimensions 738 mm 29 in 210 mm 8 3 in 50 mm 2 in 758 mm 29 8 in SB18 IIi owner s manual EN version 1 0 59 ...

Page 60: ...e for vertical deployment of Kara IIi and SB18 IIi 2 Ø19 mm shackles WLL 3 25 t Weight net 21 kg 46 lb Material high grade steel with anti corrosion coating KARAIIi BUMP dimensions 700 mm 27 6 in 707 mm 27 8 in 80 mm 3 1 in 60 SB18 IIi owner s manual EN version 1 0 ...

Page 61: ...rackets for Kara IIi and SB18 IIi Weight net 0 5 kg 1 1 lb Material high grade steel with anti corrosion coating KARAIIi FIXBRACKET dimensions Ø 11 5 mm 0 45 in Ø 6 9 mm 0 27 in 35 mm 1 4 in 60 mm 2 4 in 75 mm 3 in 6 9 mm 0 27 in SB18 IIi owner s manual EN version 1 0 61 ...

Page 62: ...teel with anti corrosion coating CLAMP250 dimensions 167 mm 6 6 in 103 mm 4 1 in 227 mm 8 9 in SB18IIi SCREEN speci cations Description Acoustically transparent front screen for SB18 IIi Weight net 2 7 kg 6 lb SB18IIi SCREEN dimensions 714 mm 28 1 in 539 mm 21 2 in 97 mm 3 8 in 62 SB18 IIi owner s manual EN version 1 0 ...

Page 63: ...ovides the recommended maximum length for loudspeaker cables depending on the cable gauge and on the impedance load connected to the ampli er recommended maximum length cable gauge 8 Ω load 4 Ω load 2 7 Ω load mm 2 SWG AWG m ft m ft m ft 2 5 15 13 30 100 15 50 10 33 4 13 11 50 160 25 80 17 53 6 11 9 74 240 37 120 25 80 Use the more detailed L Acoustics calculation tool to evaluate cable length and...

Page 64: ...om rigging systems Dimensions 699 8 3 mm 27 51 0 12 in 700 3 mm 27 55 in 1082 2 mm 42 61 in 3 mm 0 11 in 4 x M6 inserts per side 660 9 mm 25 98 in 492 mm 19 37 in SB18 IIi Weight without rigging plates SB18 IIi 48 kg 106 lb 64 SB18 IIi owner s manual EN version 1 0 ...

Page 65: ...s of the array Recommended screws for a 3 mm thickness metal sheet M6x18 Adapt the length of the screws according to the thickness of the sheet Prevent bolts from loosening threadlocker spring washer Threaded inserts Maximum loads Maximum tensile load 1160 N Maximum shear load 4250 N Recommended torque 5 N m SB18 IIi owner s manual EN version 1 0 65 ...

Page 66: ...L Acoustics 13 rue Levacher Cintrat 91460 Marcoussis France 33 1 69 63 69 63 info l acoustics com www l acoustics com ...

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