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
SLC308-8T
Preassembled Ceiling Speaker System
FEATURES – THE ALTEC LANSING DIFFERENCE
•
High Efficiency – 97 dB SPL
•
High Output – 109 dB Peak SPL (8 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
•
½ in. (13 mm) Conduit Connector
•
Metal Tile Bridge Included
GENERAL PRODUCT DESCRIPTION
High labor costs are driving the development of a new generation
of preassembled, quick-install ceiling speaker systems. Altec
Lansing’s SLC308-8T builds on the company’s strength as one of
the world’s leading supplier of premium 8 in. (203 mm) Duplex
®
ceiling speakers equipped with premium, low-insertion loss
transformers.
The SLC308-8T features Altec’s best selling CD308-8T component.
The CD308 is an 8 in. (203 mm) Duplex
®
component rated at 16W
AES / 64W peak power handling. The 8 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 a broadband efficiency rating
of 97 dB SPL (1W/1m), the SLC308-8T has rated peak output of
109 dB SPL using the 8 watt transformer tap at a distance of one
meter. Less efficient ceiling speaker systems require 30W to 60W
transformer taps to generate similar output. The high efficiency
design of the SLC308-8T allows the systems integrator to
downsize the amplifier channel assigned to each zone of ceiling
speakers by a factor of two-thirds or more. Using the SLC308-8T
is the most profitable choice a sound contractor can make.
The CD308-8T 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 SLC308-8T 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 SLC308-8T.
In addition to industry-leading efficiency and output, the SLC308-
8T is among the most lightweight packages available to sound
contractors. The low-profile design allows the SLC308-8T 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
130 Hz – 20 kHz (
±
5 dB)
USABLE LOW FREQUENCY LIMIT (-10 dB)
1, 2
110
Hz
SENSITIVITY
3
97 dB SPL
POWER HANDLING
4
16 W AES (continuous); 64 W peak
PEAK OUTPUT (1 m)
5
115 dB SPL; 109 dB SPL (8W transformer tap)
COVERAGE ANGLES
6
90º (horizontal) by 90º (vertical)
DIRECTIVITY FACTOR, Q
6
11.91
DIRECTIVITY INDEX, DI
6
10.76
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:
7.3 ohms at approximately 7.5 kHz
CROSSOVER FREQUENCY
Passive LF - HF: 3,000 Hz
TRANSFORMER
Premium 8 watt 70V/100V, switch selectable taps of 8W, 4W,
2W, and 1W; 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 - 9.31 in. (236 mm); Baffle – 11.75 in. (298 mm)
Grille – 12.75 in. (324 mm)
Depth:
Can – 7.85 in. (199 mm)
Length/Width:
Tile Bridge – 23.75 in. (603 mm) / 14 in. (356 mm)
NET WEIGHT
8.5 lbs. (3.86 kg), one speaker system with grille
SHIPPING WEIGHT
31.7 lbs. (14.38 kg),
(includes 2 speaker systems with grilles and tile bridges)
CD308-8A – THEILE-SMALL PARAMETERS
Free Air Resonance, ƒ
S
:
92.2
Hz
Equivalent Volume Compliance, V
AS
: 0.84
ft.
3
(23.7 l)
Total Q, Q
TS
:
0.87
Electrical Q, Q
ES
:
1.05
Mechanical Q, Q
MS
:
5.26
D.C. Resistance, R
E
:
8.0
ohms
Peak Linear Displacement, X
max
:
0.05 in. (1.3 mm)
Reference Efficiency,
η
o
:
2.13%
