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GENERAL INFORMATION The DS1390 plenum masker is a complete loudspeaker assembly ready for installation, in an open structure office facility or above suspended ceilings. The unit is composed of an six-inch diameter loudspeaker, metallic back box, 70V transformer, and volume control. The unit should be wired to a power amplifier with a 70.7 V output.
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It is not critical that the speaker be perfectly level, other than for aestetic reasons. Dynasound, Inc. 6439 Atlantic Blvd. Norcross, GA. 30071 800.989.6275...
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The owner must pay freight to return the unit and Dynasound will pay the freight for return. For Non-warranty repair, the owner must pay freight to return the unit. If the customer has credit, Dy- nasound will repair the unit and return it with an invoice for both the repair and return freight charges.
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