1000 W. Wilshire Blvd., Suite 362
y
Oklahoma City, Oklahoma 73116
y
Phone: 405.848.3108
y
Fax: 405.848.3217
y
www.altecpro.com
SLC408-16T
Preassembled Ceiling Speaker System
FEATURES – THE ALTEC LANSING DIFFERENCE
•
High Fidelity – 8 in. (203 mm) Duplex® Component
•
Industry-Leading Efficiency – 98 dB SPL
•
High Output – 113 dB Peak SPL (16 watt Tap)
•
Preassembled Speaker System for Quick Installation
•
Off-White Décor Snap-On One Piece Metal Grille
•
5-Position Switch for Easy Transformer Tap Selection
•
Metal Tile Bridge Included
GENERAL PRODUCT DESCRIPTION
Over the past twenty-five years, Altec Lansing has sold more
premium eight-inch Duplex® ceiling speakers than any other
manufacturer. Consultants and sound contractors have long
considered Altec’s eight-inch ceiling speaker components their
preferred choice for high fidelity music playback and critical
speech intelligibility applications. The SLC408-16T takes our best-
selling premium high fidelity 8 in. (203 mm) Duplex® component
and offers it in a preassembled, quick-mount ceiling speaker
package.
The SLC408-16T features Altec’s premium CD408-16T component.
The CD408 is an 8 in. (203 mm) Duplex® component rated at 32W
AES / 128W peak power handling. The high quality 16 watt
70V/100V transformer has a broadband insertion loss of < 0.6 dB
from 50 Hz to 15 kHz.
Altec’s high efficiency Duplex® design delivers maximum output
with minimum amplifier power. At an industry-leading broadband
efficiency rating of 98 dB SPL (1W/1m), the SLC408-16T has rated
peak output of 113 dB SPL using the 16 watt transformer tap at a
distance of one meter. Less efficient ceiling speaker systems
require 60W transformers to generate similar output. The high
efficiency design of the SLC408-16T allows the systems integrator
to downsize the amplifier channel assigned to each zone of
ceiling speakers by a factor of two-thirds or more.
The CD408-16T is installed in a round, metal, dampened 0.25
cubic foot enclosure with metal strain relief strap. Three metal
dogleg arms are screwed-down to secure the enclosure to the
included metal tile bridge. An off-white one piece metal décor
grille snaps into the assembly. The SLC408-16T has a two-wire
input connection (red & black), making it fool-proof for even the
least experienced installers. The ½ in. (13 mm) connector easily
mates to either metal or flex conduit.
Installers particularly like Altec’s package. The mounting hole in
the metal tile bridge serves as a hard template for cutting a
perfect hole in the ceiling tile. A metal S-hook allows the
installer to hang the enclosure from the ceiling grid of flex-
conduit while wiring up the SLC408-16T.
In addition to industry-leading efficiency and output, the SLC408-
16T is among the most lightweight packages available to sound
contractors. The low-profile design allows the SLC408-16T to fit
into tight ceiling spaces. An optional ring (SLC-RING) is required
for plaster or sheetrock ceilings.
NOTE: SHIPPED IN PAIRS
SPECIFICATIONS
FREQUENCY RESPONSE
1, 2
135 Hz – 16 kHz (
±
5 dB)
USABLE LOW FREQUENCY LIMIT (-10 dB)
1, 2
115
Hz
SENSITIVITY
3
98 dB SPL
POWER HANDLING
4
32 W AES (continuous); 128 W peak
PEAK OUTPUT (1 m)
5
119 dB SPL; 113 dB SPL (16W transformer tap)
COVERAGE ANGLES
6
80º (horizontal) by 80º (vertical)
DIRECTIVITY FACTOR, Q
6
11.14
DIRECTIVITY INDEX, DI
6
10.47
dB
TRANSDUCER COMPONENTS
LF: 1 x 8-in. (203 mm), low frequency woofer
HF: 1 x 3-in. (76 mm), high frequency tweeter
IMPEDANCE
7
Nominal:
8.0
ohms
Minimum:
7.8 ohms at approximately 8 kHz
CROSSOVER FREQUENCY
Passive LF - HF: 2,500 Hz
TRANSFORMER
Premium 16 watt 70V/100V, switch selectable taps of 16W, 8W,
4W, and 2W; rated at < 0.6 dB insertion loss, 50Hz – 15 kHz
INPUT CONNECTIONS
Only 2 wires, pre-stripped, for simple, quick installation
FINISH
Enclosure - Black Painted Steel with internal damping material
Grille – Matte White Décor Round Metal Grille
DIMENSIONS
Diameter:
Can - 9.25 in. (235 mm); Baffle – 11.75 in. (298 mm)
Grille – 12.75 in. (324 mm)
Depth:
Can – 7.85 in. (199 mm)
NET WEIGHT
9.8 lbs. (4.45 kg), one speaker system with grille
SHIPPING WEIGHT
34.3 lbs. (15.56 kg),
(includes 2 speaker systems with grilles and tile bridges)
CD408-8A – THEILE-SMALL PARAMETERS
Free Air Resonance, ƒ
S
:
84.4
Hz
Equivalent Volume Compliance, V
AS
: 1.0
ft.
3
(28.3 l)
Total Q, Q
TS
:
0.94
Electrical Q, Q
ES
:
1.10
Mechanical Q, Q
MS
:
6.52
D.C. Resistance, R
E
:
7.2
ohms
Peak Linear Displacement, X
max
:
0.008 in. (0.2 mm)
Reference Efficiency,
η
o
:
1.50%
