Front Baffle Assembly Installation Into Back Box - JBL SCL-3 Owner's And Installer's Manual

IMPORTANT NOTE BEFORE INSERTING REAR ENCLOSURE: On the SCL-4 systems, note that the terminal
cup end of the back box is the "horn end" and the woofer end of the SCL speaker mounts away from the terminal cup
end of the back box. So, the positioning of the rear enclosure terminal will determine the orientation of the horn. For
example, if the terminal is located at the top then the horn will be located in the top position above the woofer. On the
SCL-3 system, the system is designed so the orientation of rear enclosure terminals will not dictate horn location. The
SCL-3 baffle (horn) can be positioned in any one of four positions despite installation orientation of rear enclosure.
3. Connect the wires from your amplifier (already run into wall) to the appropriate terminals on the terminal cup of
the back box.
4. Position rear enclosure with the four L-brackets positioned against four tabs of wall bracket. Remember on
SCL-4 systems, terminal orientation determines horn location. See "2" above.
5. Secure L-brackets to tabs with 8 supplied machine screws. (See Figure 12).
WARNING: Make sure to use the supplied Security Plates for all In-Ceiling installations!
6. Slightly loosen 8 large (1/4-20 x ¾") screws inside enclosure so that it moves in and out of wall.
7. Position front edge of enclosure to be flush to wall surface or any wall treatment. Tighten screws. For
installations with very thick wall treatment, consider reversing the enclosure L-brackets so they stick out from the
wall. This will offer additional forward placement of the system (See Figure 13)
FRONT BAFFLE ASSEMBLY INSTALLATION
WARNINGS:
Do not over tighten baffle mounting screws! If using power tools to secure baffle screws, use only lowest clutch
setting - enough to pull baffle to wall where gasket just touches mounting surface. For proper sealing of gasket and
vibration isolation, hand tighten screws rest of the way to approximately 8 to 16 in-lbs maximum. (This is equivalent to
approximately 1/2 - screw head rotation from when baffle gasket just touches enclosure and wall surface).
1. Make necessary electrical connections from rear enclosure terminal wiring to network by attaching the inline
connector at the end of the wires to the header on the crossover printed circuit board. If you are bi-wiring or bi-
amplifying your speaker, see Bi-Wiring and Bi-amplifying Instructions, below, before installing your speaker.
2. Remember to orient the SCL-4 so the horn installs close to the terminal cup (see note "b" under Rear Enclosure
Installation, above). The SCL-3 can install in any orientation relative to its back box. This installation flexibility
allows horn axis positioning and room acoustic optimization without the necessity of changing rear enclosure or
wall bracket orientation.
3. Position Baffle assembly into enclosure. Gasket on baffle should be seated on enclosure edge and wall.
CAUTION: Make sure to carefully guide terminal connection wires when inserting the baffle to prevent pinching
the wires during assembly (See Figure 13 and 14).
8
Figure 12
Figure 13