Altec Lansing CD308-16T User manual

CD308-8A
CD308-4T
CD308-8T
CD308-16T
8” Ceiling Speakers
SPECIFICATIONS
Frequency Response
78 – 20,000 Hz +/- 5 dB
Low frequency limit (-10 dB)
63 Hz
Power Handling
16 W EIA, 64 W peak
Sensitivity (SPL - 1 W 1 m)
97 dB
Maximum Output (Peak SPL)
115 dB
Magnet Weight
0.63 lb (0.29 Kg)
Impedance
Nominal - 8 Ohms
Minimal - 7.3 Ohms
Crossover
3,000 Hz
DIMENSIONS
CD308-8A
Height: 3.11 in (79.6 mm)
Diameter: 8.07 in (205 mm)
CD308-4T
Height: 3.68 in (94.1 mm)
Diameter: 8.07 in (205 mm)
NET WEIGHT
CD308-8A
2 lbs 7 oz (1.1 kg)
CD308-4T
3 lbs 13 oz (1.7 kg)
SHIPPING WEIGHT
CD308-8A
2 lbs 6 oz (1.4 kg)
CD308-4T
4 lbs 9 oz (2.1 kg)
TRANSFORMER
CD308-4T
4 W 70 V/100 V transformer
with 70 V taps @ 4 W, 2 W, 1 W and 0.5 W
CD308-8T
8 W 70 V/100 V transformer
with 70 V taps @ 8W, 4W, 2W and 1.0W
CD308-16T
16 W 70 V/100 V transformer
with 70 V taps @ 16W, 8W, 4W and 2.0W
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
CD308 Series
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.
CD308-8T
Height: 3.68 in (94.1 mm)
Diameter: 8.07 in (205 mm)
CD308-16T
Height: 4.11 in (104.1 mm)
Diameter: 8.07 in (205 mm)
CD308-8T
4 lbs 1 oz (1.8 kg)
CD308-16T
4 lbs 10 oz (2.1 kg)
CD308-8T
4 lbs 13 oz (2.2 kg)
CD308-16T
5 lbs 7 oz (2.5 kg)
PROFESSIONAl
1000 W. Wilshire Blvd., Suite 362 • Oklahoma City, Oklahoma 73116 • Phone: [phone] • Fax: [phone] • www.altecpro.com

ARCHITECTS & ENGINEERS SPECIFICATION
The loudspeaker shall be an Altec Lansing Professional CD308
series Duplex®with an 8 inch (200 mm) diameter moisture-
resistant woofer and broad dispersion tweeter with heat
resistant voice-coils. The speaker shall have a power rating
of 16 W EIA / 64 W peak, a double magnet assembly and
corrosion-resistant frame. The frequency response shall be 78
to 20,000 Hz +/- 5 dB with a sensitivity of 97 dB @ 1 W 1 m.
All transformers shall have a low < 0.6 dB insertion loss. The
model numbers shall be Altec Lansing Professional CD308-8A
for 8 Ohms impedance, CD308-4T with a 4 Watt 70 V/100 V
transformer, CD308-8T with an 8 Watt 70 V/100 V transformer,
and a CD308-16T with a 16 Watt 70 V/100 V transformer.
ENCLOSURES AND BAFFLES
The CD308-series ceiling speakers will fit on standard
8 inch (200 mm) baffles, enclosures and back boxes.
All measurements were made in a standard AES baffle
for a 12 inch driver. The driver was housed in a 1.0 ft3
(0.028 m3) enclosure.
Please note that larger volume enclosures will result
in altered low frequency performance.
SAFETY CONSIDERATION
1. Appropriate connectors with suitable ratings must be used
to make all installation connections.
2. All unused taps must be insulated with suitable insulation.
3. Transformers and speaker combinations must be supplied
by a suitable amplifier incorporating ungrounded outputs
only and reinforced insulation (as per IEC60065) from output
to mains.SORIES
ACCESSORIES
Altec Lansing recommends use of our 8 inch (200 mm) round and
square metal enclosures, grilles and tile bridge. The CD308 Series
will also fit on standard industry ceiling speaker hardware.
MOUNTING DIMENSIONS
Frequency Response (1 W 1 m on-axis)
Impedance Q&Directivity Index
Beamwidth
AB
AB
CD308-8A 8.07 in (205 mm) 3.11 in (79 mm)
CD308-4T 8.07 in (205 mm) 3.68 in (94 mm)
CD308-8T 8.07 in (205 mm) 3.68 in (94 mm)
CD308-16T 8.07 in (205 mm) 4.11 in (105 mm)

As we are continually striving to improve Altec Lansing products, specifications are subject to change without notice.
250 Hz 500 Hz
1 kHz 2 kHz
4 kHz 8 kHz
One Octave Polar Response Charts
6 dB/Division

CD308-SS REV06
TRANSFORMER CHART
WIRING DIAGRAM
CD308
YELLOW
0.5 dB
1.0 dB
8 Ω
ORANGE
RED
BROWN
COMMON
BLACK/WHITE
BLACK LEAD
COMMON
+
-
Premium 4 W Premium 8 W Premium 16 W 70.7 V 100 V
Transformer Transformer Transformer Primary Tap Primary Tap
(T504-71) (T508-71) (T516-71) Color Code Color Code
Primary Primary Primary
4.0 W 8.0 W 16.0 W Brown Red
2.0 W 4.0 W 8.0 W Red Orange
1.0 W 2.0 W 4.0 W Orange Yellow
0.5 W 1.0 W 2.0 W Yellow N/A
Primary Common Black
© 2002 Altec Lansing Professional
1000 W. Wilshire Blvd., Suite 362
Oklahoma City, Oklahoma 73116
Phone: [phone] • Fax: [phone]
Web: WWW.altecpro.com • Email: [email protected]
PROFESSIONAl