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
ENCLOSURES AND BAFFLES
The
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.
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.
Frequency Response (1 W 1 m on-axis)
Impedance 
MOUNTING DIMENSIONS
Beamwidth
Q & Directivity index
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| A | B |
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| 8.07 in (205 mm) | 3.11 in (79 mm) | ||
| 8.07 in (205 mm) | 3.68 in (94 mm) | ||
| 8.07 in (205 mm) | 3.68 in (94 mm) | ||
| 8.07 in (205 mm) | 4.06 in (103 mm) | ||
| 8.07 in (205 mm) | 4.41 in (112 mm) | ||
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A
B 