CD308 Series
8” Ceiling Speakers
CD308-8A
CD308-4T
CD308-8T
CD308-16T
PROFE S S IONA l
FEATURES – THE ALTEC LANSING DIFFERENCE
• Premium 8 inch / 200 mm Duplex® design
• Point-source design maximizes speech intelligibility
• 16 W EIA / 64 W peak power handling
• Available with three factory-mounted 70 V / 100 V
transformers
• All transformers have a low < .6dB insertion loss
• Corrosion resistant speaker frame
• Special moisture resistant speaker cone
GENERAL PRODUCT DESCRIPTION
The Altec Lansing Professional CD308 series is a premium-grade
Duplex® component designed to faithfully reproduce music
program and the human voice. The CD308 family is an excellent
choice for meeting spaces, under-balcony applications, A/V
presentation facilities, shops & restaurants and other high quality
general paging applications. The loudspeaker consists of an
8 inch / 200 mm special moisture resistant cone woofer and
broad dispersion cone tweeter with heat resistant voice coils.
The speaker frame has been treated for rust prevention. A 3,000
Hz first-order crossover provides smooth high frequency
transitions. The double magnet design allows physical, electrical,
and magnetic isolation. The optional 70 V/100 V transformers (4,
8, and 16 Watts) feature a low < 0.6 dB insertion loss.
SPECIFICATIONS
Frequency Response
78 – 20,000 Hz +/- 5 dB
Low frequency limit (-10 dB)
63 Hz
NET WEIGHT
CD308-8A
2 lbs 7 oz (1.1 kg)
CD308-4T
CD308-8T
4 lbs 1 oz (1.8 kg)
CD308-16T
4 lbs 10 oz (2.1 kg)
3 lbs 13 oz (1.7 kg)
Power Handling
16 W EIA, 64 W peak
Sensitivity (SPL - 1 W 1 m)
97 dB
Maximum Output (Peak SPL)
115 dB
SHIPPING WEIGHT
CD308-8A
2 lbs 6 oz (1.4 kg)
CD308-4T
CD308-8T
4 lbs 13 oz (2.2 kg)
CD308-16T
5 lbs 7 oz (2.5 kg)
4 lbs 9 oz (2.1 kg)
Magnet Weight
0.63 lb (0.29 Kg)
Impedance
TRANSFORMER
CD308-4T
Nominal - 8 Ohms
Minimal - 7.3 Ohms
Crossover
4 W 70 V/100 V transformer
with 70 V taps @ 4 W, 2 W, 1 W and 0.5 W
CD308-8T
3,000 Hz
8 W 70 V/100 V transformer
with 70 V taps @ 8W, 4W, 2W and 1.0W
DIMENSIONS
CD308-16T
CD308-8A
Height: 3.11 in (79.6 mm)
Diameter: 8.07 in (205 mm)
CD308-4T
16 W 70 V/100 V transformer
with 70 V taps @ 16W, 8W, 4W and 2.0W
CD308-8T
Height: 3.68 in (94.1 mm)
Diameter: 8.07 in (205 mm)
CD308-16T
Height: 3.68 in (94.1 mm)
Diameter: 8.07 in (205 mm)
Height: 4.11 in (104.1 mm)
Diameter: 8.07 in (205 mm)
1000 W. Wilshire Blvd., Suite 362 • Oklahoma City, Oklahoma 73116 • Phone: 1-405-848-3108 • Fax: 1-405-848-3217 • www.altecpro.com
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One Octave Polar Response Charts
6 dB/Division
250 Hz
1 kHz
4 kHz
500 Hz
2 kHz
8 kHz
As we are continually striving to improve Altec Lansing products, specifications are subject to change without notice.
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TRANSFORMER CHART
CD308
Premium 4 W
Transformer
(T504-71)
Premium 8 W
Premium 16 W 70.7 V
100 V
Primary Tap
Color Code
Transformer
(T508-71)
Primary
Transformer
(T516-71)
Primary
Primary Tap
Color Code
Primary
4.0 W
2.0 W
1.0 W
0.5 W
8.0 W
4.0 W
2.0 W
1.0 W
16.0 W
8.0 W
4.0 W
2.0 W
Brown
Red
Red
Orange
Yellow
N/A
Orange
Yellow
Primary Common
Black
WIRING DIAGRAM
YELLOW
1.0 dB
ORANGE
0.5 dB
RED
+
-
BROWN
COMMON
BLACK/WHITE
BLACK LEAD
8 Ω
COMMON
PROFESS IONA l
© 2002 Altec Lansing Professional
1000 W. Wilshire Blvd., Suite 362
Oklahoma City, Oklahoma 73116
Phone: 1-405-848-3108 • Fax: 1-405-848-3217
CD308-SS REV06
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