Paradigm SIG-LCR 5 v.3 Manual - Page 5
Installing The Backbox, How To Avoid Speaker Damage, Pre-wiring The Backbox
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INSTALLING THE BACKBOX (continued) THE MASONITE COVER Leave the masonite cover attached when installing backbox. It prevents dust and dirt from entering the box. Do not remove until ready to install speakers. INSTALLING BX-LCR 3 (backbox) for SA-LCR 3 (speaker) Vertical Installation The BX-LCR 3 backbox is designed to fit vertically between two standard 2˝ x 4˝ (or 2˝ x 6˝) wall studs on 16˝ centers. See Fig. 3 for detailed instructions. Horizontal Installation The BX-LCR 3 backbox will NOT fit horizontally between studs centered on 16˝. A "window-frame-style" rough-in at the pre-construction stage is required. See Fig. 3 for detailed instructions. INSTALLING BX-LCR 5 (backbox) for SIG-LCR 5 (speaker) Vertical and Horizontal Installation The BX-LCR 5 backbox will NOT fit vertically or horizontally between studs centered on 16˝. A "window-frame-style" rough-in at the preconstruction stage is required. See Fig. 4 for detailed instructions. INSULATING THE CAVITY BEHIND THE WALL While the backbox provides a moderate reduction in the amount of acoustic bleed-through to adjacent rooms, we strongly recommend placing damping material in the entire wall on which the speakers are installed (not shown and not included). For optimal bass response, damping material should be evenly spaced across the wall cavity. DO NOT add damping material to the area directly behind the backbox. (See Dealer for recommendations on the type of insulation best suited to reduce acoustic bleed-through.) HOW TO AVOID SPEAKER DAMAGE Use an appropriate amplifier. At high volumes, a very powerful amplifier can overdrive speakers and damage them. On the other hand, if the amplifier isn't powerful enough, it can produce clipping distortion that can easily damage high-frequency drivers. (See Dealer for more information.) Don't be fooled by the amplifier's volume control. It adjusts listening level-it does not indicate power output. If the speakers begin to sound harsh or grating, or if you hear the bass breaking up, turn the volume down immediately or you will damage the speakers! This type of damage constitutes abuse and is not covered by warranty! Tone controls and equalizers can demand even more power from an amplifier, lowering the point at which it produces clipping distortion. Use them sparingly, if at all, and do not use them when listening at loud levels. PRE-WIRING THE BACKBOX (Fig. 7) You are now ready to pre-wire the backbox for speaker installation at a later date. For optimal sound reproduction, the use of high-quality speaker cable is essential. Use only cable that is rated for in-wall use: • The UL standard is CL2, CL3 and CM • The CSA standard is FT4 Determine the length of cable you will need to run from the backbox along the wall to the amplifier. Connect one cable length to the red (+) backbox terminal and the other length to the black (-) backbox terminal. Make sure wires are firmly fastened at the backbox end. Fasten cable to box with wire tie (optional). Run cable along backbox and through cable loop, see Figs. 3 (b) and 4 (b), then route the cable to the approximate area where the amplifier will be located. In areas where cable runs along the backbox, we recommend adding a layer of damping material to prevent cable rattling or vibrating later while speakers are playing. IMPORTANT! Correct polarity or phase is critical for proper stereo imaging and bass performance. At the amplifier end and before drywalling, be sure to clearly identify which cable leads to which backbox terminal. Once drywalling is complete, you will not be able to go back and verify. 5