Product OverviewThe Cambridge Sound DS1339B (part number 911.0708.900) is a black Dynasound sound masking speaker with a 5.25-inch full-range driver mounted on axis. It installs quickly into open structure architecture and above suspended ceilings. An internal 70.7-volt transformer with an 8-ohm secondary ties it into distributed masking, paging, and music lines.Product DescriptionThe DS1339 pairs a 5.25-inch full-range paper cone driver with a one-inch voice coil inside a compact enclosure. A convoluted, flame-retardant acoustical insert eliminates standing waves and metallic resonance so the masking spectrum stays smooth. Rated power handling is 4 watts at 70.7 volts, with the transformer secondary equal to 8 ohms for low-impedance connections. Nominal dispersion of 160 degrees horizontal by 165 degrees vertical delivers uniform coverage for masking, paging, and music signals. When suspended, the assembly presents a clean appearance with no exposed controls or wiring from below. At 8.5 inches in diameter, 4.5 inches tall, and 4.4 pounds, it hangs easily in open structure and plenum spaces. Pair it with Dynasound generators and amplification from the Cambridge Sound collection at Creation Networks.Key Features 5.25-Inch Full-Range Driver — paper cone with one-inch voice coil mounted on axis. Resonance Control — convoluted, flame-retardant acoustical insert eliminates standing waves and metallic resonance. 70.7V Operation — 4-watt power handling at 70.7 volts with 8-ohm secondary. Wide Dispersion — nominal 160° H x 165° V coverage for uniform masking. Clean Suspended Appearance — no exposed controls or wiring visible from below. Multi-Signal Use — suited for sound masking, paging, and music. Technical Specifications Specification Value Model DS1339B Part Number 911.0708.900 Loudspeaker Type 5.25-inch full-range paper cone driver, 1-inch voice coil, 70.7 V Power Handling 4 W @ 70.7 V Nominal Impedance 70.7 V / secondary equals 8 ohms Nominal Dispersion 160° H x 165° V Height 4.5 in (11.4 cm) Diameter 8.5 in (21.6 cm) Weight 4.4 lbs (2 kg) Color Black Specifications sourced from Cambridge Sound vendor data. Unlisted values are omitted rather than estimated.
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