4Jcs Ceiling Speaker Installation - Lightspeed 975 Installation Manual

9. Place the WMQ speaker between the two bracket arms, aligning the mounting
holes.
10. Insert the large plastic mounting screws into the two sides of the speaker and
tighten with your fingers.
11. Direct the speaker at the appropriate angle to cover the desired area of the
classroom (see figure 1).
CONNECTING AND ROUTING SPEAKER WIRE
Locate the plenum rated wire included with the speaker components (If ordered).
1. Distribute the appropriate lengths of wire to each speaker (see figure 3). There
should be (2) 50 ft lengths of wire between two pairs of speakers. There should
be (2) 75 ft lengths of wire for home runs back to the amplifier.
2. At Speaker #1, remove the euro-block connector on the back of the speaker.
3. Connect one 75 ft length of speaker wire to the +- connector, paying attention
to polarity (BLACK is "-", RED is "+"). Tighten the screw on top of the connector
with small screwdriver to secure. This length of wire will be routed back to the
amplifier. Note that there must be a service loop of 8 to 10 ft at the speaker and
the speaker wire cut to length at the amplifier.
4. Connect a 50 ft length of speaker wire to the second set of +- jacks on the
connector (see figure 3) paying attention to polarity. Tighten the screws to
secure and plug the connector back into the speaker. This wire will be routed to
Speaker #2.
5. Route the wire to Speaker #2. Secure and conceal wire as needed.
6. At Speaker #2, remove the euro-block connector.
7. Connect the wires to the +- connectors on the input, paying attention to
polarity. Tighten the screws on top to secure and plug back into the speaker.
8. Repeat 2 through 7 to connect Speakers #3 and #4.
9. A 75 ft lenth of wire will be routed back to the amplifier. Note that there must be
a service loop of 8 to 10 ft at the speaker and the speaker wire cut to length at
the amplifier.
10. To continue with installation, go to Page 22: Connecting Wire to Amplifier.
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WALL BRACKET MOUNTING THE SPEAKER
75 FT.
SPEAKER #2
SPEAKER #4
SPEAKER #1
SPEAKER #3
AMPLIFIER
50 FT. 50 FT.
IN FROM AMP OUT TO
SPEAKER #3

4JCS Ceiling Speaker Installation

Tools and Equipment Speaker Components
• Straight edge • (4) Speaker/baffle assembly
• Marker • (4) Tile bridge
• Scissors (template) • (4) Speaker enclosure
• Utility knife • (16) Mounting screws
• Screwdriver • (8) Wire nuts
• Plenum rated pass-through • (2) 30 ft bundles of plenum-rated speaker
or conduit hardware (not wire (if ordered) marked with a white band
included)
• (2) 50 ft bundles of plenum-rated speaker
wire (if orderd) markedwith a blue band
NOTE: Wiring should follow the class 2 wiring methods as
outlined in the National Electric Code.
SELECTING SPEAKER MOUNTING LOCATIONS
75 FT.
A standard system includes four lenum-rated ceiling speakers for rooms up to 1,600 sq ft
(148sqm) with a ceiling height of 9-12 feet (2.75m - 3.75m). The location of the speakers is
critical for even sound distribution.
1. Quarter the classroom into four equal quadrants (see figure 1).
2. Select a ceiling tile that is centered in each quadrant.
3. Remove the selected ceiling tiles for speaker installation.
ENCLOSURE
BRIDGE
10" HOLE
CEILING TILE
SPEAKER AND BAFFLE
ASSEMBLY
4JCS LOCATIONS
CEILING
LEVEL
FIGURE 1:
LISTENING AREA
SPEAKER PLACEMENT
DIVIDE THE LISTENING
AREA INTO QUARTERS
AND CENTER SPEAKERS
IN EACH SECTION
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