User manual JBL VT4886-DF88

[. . . ] Precautions should be taken to assure that the speaker does not fall off a stage or surface on which it is placed. SUSPENSION OF LOUDSPEAKER SYSTEM Before attempting to suspend your JBL loudspeakers, read and understand the following safety information. IMPORTANT SAFETY WARNING! The information in this section has been assembled from recognized engineering data and is intended for informational purposes only. None of the information in this section should be used without first obtaining competent advice with respect to applicability to a given circumstance. None of the information presented herein is intended as a representation or warranty on the part of JBL. [. . . ] The inspection shall include a visual survey of all corners and load bearing surfaces for signs of cracking, water damage, de-lamination, or any other condition that may decrease the strength of the loudspeaker enclosure. Accessory suspension hardware provided with or for JBL VT4886 and VT4883 loudspeakers must be inspected for fatigue at least annually or as required by local ordinance. The inspection shall include a Page 4 VT4886-DF88 VT4886-DF89 Downfill Adapter User Guide visual survey of the material for signs of corrosion, bending or any other condition that may decrease the strength of the fastener. Additionally, any eyebolts shall be checked for possible spin-out of the enclosure. For all other hardware and fittings, refer to the hardware manufacturer's inspection and maintenance guidelines for process. JBL is not responsible for the application of its products for any purpose or the misuse of this information for any purpose. Furthermore, JBL is not responsible for the abuse of its products caused by avoiding compliance with inspection and maintenance procedures or any other abuse. Prior to suspending the system, an expert, trained and experienced in suspending speaker systems should inspect all parts and components. RESOURCES Adaptive Technologies Group 562. 424. 1100 1635 E. Burnett Street Signal Hill, CA 90755 www. adapttechgroup. com McMaster Carr Various Locations in the USA For a location near you, visit them at www. mcmaster. com JBL Professional - Tech Note Vol. 14 "Basic Principles for Suspending Loudspeakers" www. jblpro. com/catalog/support/getfile. aspx?docid=296&doctype=3 SAFE SUSPENSION JBL suspendable version loudspeakers are supplied with built-in internal brackets. The systems are designed to facilitate the suspension of the loudspeaker by a qualified person familiar with rigging hardware and industry practices. If you are unfamiliar with Safe Rigging Practices you will need to consult with a qualified person familiar with rigging hardware and industry practices. WORKING LOAD LIMIT (WLL) VT4886-DF88 WLL = 280 lbs (127 kg) VT4886-DF89 WLL = 280 lbs (127 kg) WARNING Suspension of JBL loudspeakers must employ a minimum of two (2) attachment points. When "bridling" a JBL loudspeaker system, two (2) legs of equal length must be used. The rear attachment points are pullback points and are intended only for use in adjusting the down-angle of the speaker enclosure. Only the top and bottom attachment points are intended for use as suspension points. 8x VT4886 maximum 8x VT4886 maximum Hearing Damage, Prolonged Exposure To Excessive SPL VerTec series loudspeakers are easily capable of generating sound pressure levels (SPL) sufficient to cause permanent hearing damage to performers, production crew and audience members. Caution should be taken to avoid prolonged exposure to SPL in excess of 90 dB. Page 5 VT4886-DF88 VT4886-DF89 Downfill Adapter User Guide Figure 1: VT4886 suspended below VT4888 using VT4886-DF88 downfill adapter (left); VT4886 suspended below VT4889 using VT4886-DF89 downfill adapter (right) Page 6 VT4886-DF88 VT4886-DF89 Downfill Adapter User Guide DESCRIPTION: The VT4886-DF88 and VT4886-DF89 Down Fill adapters allow up to eight VT4886 subcompact enclosures to be installed below VT4888 and VT4889 enclosures, respectively. As illustrated in Figures 2-4, relative angles from 0 to12. 5 degrees are possible. Figure 2: Zero degree relative site angle for VT4886 versus VT4889 Figure 3: Upper hingebar adjustment provides relative site angles of 0, 1, 2, 3, 4 and 5 degrees (as shown) for VT4886 versus VT4889 Figure 4: Lower hingebar adjustment provides relative site angles of 6, 7, 8, 9, 10, 11 and 12. 5 degrees (as shown) for VT4886 versus VT4889 Page 7 VT4886-DF88 VT4886-DF89 Downfill Adapter User Guide VT4886-DF Hinge Bar Storage Sleeve The VT4886-DF is supplied with a pair of rear adapter hinge bars in a built-in storage sleeve. Adapter hinge bars are required for attachment of the top VT4886 to the VT4886-DF. [. . . ] Reduction of Hazardous Substances documentation for our RoHS compliant products. http://www. jblpro. com/catalog/support/getfile. aspx?docid=1529&doctype=3 The WEEE directive (2002/96/EC) places an obligation on all EU-based manufacturers and importers to take-back electronic products at the end of their useful life. JBL, through it's agent, accepts its responsibility to finance the cost of treatment and recovery of redundant WEEE in accordance with the specific WEEE recycling requirements. [. . . ]