Altec Lansing CD912-8A CEILING SPEAKER User manual

CD912-8A
12” Ceiling Speaker
SPECIFICATION
Frequency Response
75 – 15,000 Hz +/- 5dB
Low frequency limit (-10 dB)
45 Hz
Power Handling
125 W EIA, 500 W peak
Sensitivity (SPL - 1 W 1 m)
100 dB
Maximum Output (Peak SPL)
127 dB
Magnet Weight
2.4 lb (1.1 Kg)
Impedance
Nominal - 8 Ohms
Minimal - 4.6 Ohms
Crossover
1,500 Hz
Dimensions:
CD912-8A
Height: 4.92 in (125.7 mm)
Diameter: 12.24 in (311 mm)
Net Weight:
CD912-8A
14 lbs 1 oz (6.4 kg)
SHIPPING Weight:
CD912-8A
17 lbs 3 oz (7.8 kg)
Optional Transformer:
T516-71
16 Watt, 70 V / 100 V with 70 V
taps @ 16 W, 8 W, 4 W and 2.0 W
T532-71
32 Watt, 70 V / 100 V with 70 V
taps @ 32 W, 16 W, 8 W and 4.0 W
repair parts:
Diaphragm/Voice Coil Assembly:
R-912-8HF Kit
12” Driver Recone Kit:
R-912-8LF Kit
FEATURES – THE ALTEC LANSING DIFFERENCE
• High Fidelity Duplex®12 inch / 300 mm Speaker
• High Performance 125 W EIA / 500 W peak power
handling
• Point-Source design for superior speech intelligibility
• Corrosion resistant, die-cast speaker frame
• Special moisture resistant cone material
• Two low insertion loss transformers available
CD912 Series
GENERAL PRODUCT DESCRIPTION
Twelve-inch Duplex®speakers from Altec Lansing are the
most popular hotel ballroom ceiling speakers in the world.
The new Altec Lansing Professional CD912 is an excellent
choice for hotel meeting spaces, convention centers, airports
& transportation facilities, and any high ceiling applications
that require reproduction of high fidelity music and
intelligible speech. The loudspeaker consists of a 12 inch /
300 mm moisture resistant cone woofer, a broad dispersion
dome tweeter with heat resistant voice coils and die-cast
corrosion-resistant speaker frame. A 1,500 Hz second order
crossover provides smooth high fidelity transitions. The
optional transformers (16 and 32 Watts) feature a low
< 0.6 dB insertion loss.
PROFESSIONAl
1000 W. Wilshire Blvd., Suite 362 • Oklahoma City, Oklahoma 73116 • Phone: [phone] • Fax: [phone] • www.altecpro.com

MOUNTING DIMENSIONS
Frequency Response (1 W 1 m on-axis)
Q&Directivity Index
Beamwidth
Impedance
A
AB
CD912-8A 12.24 in (311 mm) 4.92 in (125 mm)
B
ARCHITECTS & ENGINEERS SPECIFICATION
The loudspeaker shall be an Altec Lansing Professional CD912-8A
Duplex®with a 12 inch (300 mm) diameter moisture resistant
woofer, a broad dispersion dome tweeter with heat resistant voice
coil and a die-cast corrosion-resistant speaker frame. The speaker
shall have a power rating of 125 W EIA / 500 W peak. The
frequency response shall be 75 to 15,000 Hz +/- 5 dB with a
sensitivity of 100 dB @ 1 W 1 m. The model number shall be
Altec Lansing Professional CD912-8A. Optional transformers shall
be the T516-71 (16 Watt, 70 V/100 V) or the T532/71 (32 Watt,
70 V/100 V). Transformers shall have a low < 0.6 dB insertion loss.
ENCLOSURES AND BAFFLES
The CD912-8A ceiling speaker will fit on a standard 12 inch
(300 mm) baffle, enclosures and back boxes.
The driver was housed in a 1.8 ft3(0.051 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.
ACCESSORIES
Altec Lansing recommends use of our 12 inch (300 mm) square
metal enclosures and grilles. The CD912 Series will also fit on
standard industry ceiling speaker hardware.

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

CD912-SS REV06
TRANSFORMER CHART
WIRING DIAGRAM
CD912-8A
YELLOW
0.5 dB
1.0 dB
8 Ω
ORANGE
RED
BROWN
COMMON
BLACK/WHITE
BLACK LEAD
COMMON
+
-
Premium 16 W Premium 32 W 70.7 V 100 V
Transformer Transformer Primary Tap Primary Tap
(T516-71) (T532-71) Color Code Color Code
Primary Primary
16.0 W 32.0 W Brown Red
8.0 W 16.0 W Red Orange
4.0 W 8.0 W Orange Yellow
2.0 W 4.0 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