Mounting Dimensions, Enclosures And Baffles

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.

Frequency Response (1 W 1 m on-axis)		Beamwidth

Impedance		Q & Directivity Index