MOUNTING DIMENSIONS
Frequency Response (1 W 1 m on-axis)
Q & Directivity Index
Beamwidth
Impedance
A
A
B
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 ft
3
(0.051 m
3
) 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.
