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ARCHITECTS & ENGINEERS SPECIFICATION
The loudspeaker shall be an Altec Lansing Professional CD408
series Duplex ® with an 8 inch (200 mm) diameter moisture
resistant woofer and a broad dispersion tweeter with heat
resistant voice coils. The speaker shall have a power rating
of 32 W EIA / 128 W peak, a double magnet assembly and
corrosion-resistant frame. The frequency response shall be 82
to 16,000 Hz +/- 5 dB with a sensitivity of 98 dB @ 1 W 1 m.
All transformers shall have a low < 0.6 dB insertion loss. The
model numbers shall be Altec Lansing Professional CD408-8A
for 8 Ohms impedance, CD408-4T with a 4 Watt 70 V/100 V
transformer, CD408-8T with an 8 Watt 70 V/100 V transformer,
CD408-16T with a 16 Watt 70 V/100 V transformer, and a CD408-
32T with a 32 Watt 70 V/100 V transformer.
ENCLOSURES AND BAFFLES
The CD408-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 ft
enclosure.
Frequency Response (1 W 1 m on-axis)
Impedance
MOUNTING DIMENSIONS
A
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 8 inch (200 mm) round and
square metal enclosures, grilles and tile bridge. The CD408 Series
will also fit on standard industry ceiling speaker hardware.
(0.028 m
)
3
3
Beamwidth
Q & Directivity index
A
CD408-8A
8.07 in (205 mm)
CD408-4T
8.07 in (205 mm)
CD408-8T
8.07 in (205 mm)
CD408-16T
8.07 in (205 mm)
CD408-32T
8.07 in (205 mm)
B
B
3.11 in (79 mm)
3.68 in (94 mm)
3.68 in (94 mm)
4.06 in (103 mm)
4.41 in (112 mm)
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