INSTALLATION AND WIRING
Although the SLC308-8T can be mounted into a sheetrock or
plaster ceiling, the following installation procedure is intended
for suspended tile ceilings. Note: We recommend that you order
the mounting ring (SLC-RING), not included, when installing the
SLC308-8T into a sheetrock or plaster ceiling.
1.
Place ceiling tile, finished side facing up, over the flat, 12 in.
(305 mm) to 22 in. (559 mm) diameter opening of a container
such as a Rubbermaid
®
32 gallon Brute
®
model 2632.
2.
Locate the approximate center of the mounting hole that is to
be cut, and mark this spot on the ceiling tile. Note: This
center can be located anywhere along the length of the
ceiling tile that is at least 8 in. (203 mm) from either end and
equidistant from each side edge.
3.
Align the center of the 10.75 in. (273 mm) tile bridge hole
with the spot marked as the center, and position the metal
tile bridge flat against the ceiling tile with the ends of the tile
bridge aligned to the side edges of the ceiling tile.
4.
Carefully, so as not to damage the ceiling tile, temporarily
secure the tile bridge in-place with adjustable torsion clamps
such as C-clamps.
5.
Guide the blade of a RotoZip
®
RZ01, or similar rotary cutting
tool, against the edge of and completely around the 10.75 in.
(273 mm) tile bridge hole, cutting the ceiling tile hole.
6.
Remove the torsion clamps and tile bridge from the ceiling
tile.
7.
Install the ceiling tile in the ceiling’s T-grid.
8.
Install the tile bridge on top of the ceiling tile, and align the
tile bridge hole with the newly cut ceiling tile hole.
9.
Pull the wiring and or flex conduit through the tile bridge and
ceiling tile holes.
10.
Attach one end of the S-hook to the SLC308-8T’s metal strain
relief strap and rest the other end of the S-hook, through the
mounting hole, on the top surface of the tile bridge.
11.
Connect the audio transmission (-) wire (usually black) to the
black wire of the SLC308-8T, and connect the audio
transmission (+) wire to the red wire of the SLC308-8T. Secure
a sufficient insulator cover over these connections. Note:
Proper rated wire-nuts are recommended to insulate these
connection points.
12.
If flex conduit is used, pack the excess wire into the conduit
(including the wire nuts), and secure the flex conduit with the
½ in. (13 mm) connector.
13.
Remove the S-hook and gently push the SLC308-8T (and
excess conduit or wire) up into the hole and tighten the three
mounting screws, causing the dogleg arms to swing out and
anchor the enclosure to the metal tile bridge.
14.
Snap on the metal grille.
ARCHITECT’S AND ENGINEER’S SPECIFICATIONS
The loudspeaker system shall be an in-ceiling design, consisting
of a Duplex
®
8 in. (203 mm) diameter cone woofer and a 3 in. (76
mm) diameter cone tweeter. This loudspeaker component shall
have a power rating of 16W AES (64W peak). The loudspeaker
system shall have an operating bandwidth of 130 Hz to 20 kHz,
with a sensitivity of 97 dB at one watt, when measured at one
meter. The loudspeaker system shall include a 5-position switch
for adjustable load/output requirements. The switch shall
terminate the two 18 gauge input wires directly to the nominal 8
ohm impedance of loudspeaker component, or indirectly to the
loudspeaker component through a step-down, multi-tap 8W
transformer. This transformer shall have an insertion loss of < 0.6
dB. The loudspeaker component, switch and transformer shall be
assembled into a moisture resistant black-painted steel enclosure
with internal damping material. The enclosure diameter shall be
9.31 in. (236 mm), the enclosure’s baffle diameter shall be 11.75
in. (298 mm), and the enclosure’s depth shall be 7.85 in. (199
mm), including the ½ in. (13 mm) flex-conduit connector. The
loudspeaker system shall include a 12.75 in. (324 mm) diameter,
one-piece, snap-on, off-white-painted steel grille; and a 23.75 in.
(603 mm) long, 14 in. (356 mm) wide, 20 gauge galvanized steel
tile bridge. The loudspeaker system shall be the Altec Lansing
Professional model SLC308-8T.
SPECIFICATION NOTES
1
The frequency response of the loudspeaker system is measured at a distance of no less than 3 meters to obtain full range data. The
level is then corrected to be equivalent to a 2.83 V 1 m measurement. A near field measurement of the system is performed for
frequencies below 500 Hz. This data is then combined with the full range measurement to give an accurate composite frequency
response curve.
2
The limits of the frequency response are referenced to -5 dB of the loudspeaker’s rated sensitivity in the SLC’s 0.25 ft.
3
sealed
enclosure.
3
The sensitivity of the loudspeaker system is the log based average SPL taken over the intended bandwidth of operation for the system
with a 2.83 V swept sine stimulus. The data is measured and level corrected in a manner consistent with note 1.
4
The power handling capacity of the loudspeaker system is tested using a full range form of AES Standard 2-1984. The test stimulus is
band limited (40 Hz – 16 kHz) pink noise with a 6 dB crest factor. The applied RMS voltage is determined using the minimum impedance
of the system. The amplifier used to drive the loudspeaker has a minimum operating headroom of 6 dB referenced to the RMS voltage.
5
The peak output level of the system is calculated based on the sensitivity and the peak power handling capabilities of the system.
6
The coverage angles for the loudspeaker are taken as the -6 dB points of the directivity response and averaged from 500 Hz to 16 kHz.
7
The minimum impedance of the loudspeaker is taken over its intended band of operation.
As we are continually striving to improve Altec Lansing products, specifications are subject to change without notice.
VISIT
WWW.ALTECPRO.COM
FOR
•
Authorized EASE data on all Altec Lansing Professional loudspeakers
•
PDF specification sheets. Download page 1 of the specification sheet for you submittals.
•
One paragraph A&E Specifications in .doc format
•
The latest information on Altec Lansing Professional products.
•
Performance specifications for the CD308-series speakers, including the one-octave polar response charts.
© 2004 Altec Lansing Professional
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1000 W. Wilshire Blvd., Suite 362
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Oklahoma City, Oklahoma 73116
Phone: 1.405.848.3108
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Fax: 1.405.848.3217
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Email:
Revision 01
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Frequency (Hz)
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(ref:
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Frequency Response