[. . . ] The transducer principle and its strong construction allow the UW30 to operate at much greater depths than any prior type of underwater loudspeaker design. The 12. 7-ounce ceramic magnet and state-of-the-art voice-coil construction ensure full-fidelity response with the lowest possible distortion throughout its power range. [. . . ] Operating depth shall be not more than 10 feet below the surface of the water. Recommended operating depth for optimum efficiency shall be not more than 1. 2 m (4. 0 ft. ). The UW30 loudspeaker shall be equipped with a 15. 24 m (50 ft. ), 3 conductor waterproof cable terminated within the internal encapsulation material. Case diameter shall be 182. 6 mm (7. 19 in. ), and depth shall be 6. 63 mm (2. 61 in. ). Six 5. 54 mm (0. 218 in. ) holes on a 169. 7 mm (6. 68 in. ) circle shall be provided for mounting. Up to 3. 0 m (10. 0 ft) below surface of water Recommended Installation Depth: . . . . . . . . . . . . . . . . . . . . . . . . 1. 2 m (4. 0 ft) Finish: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 182. 6 mm (7. 19 in. ) Depth: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66. 3 mm (2. 61 in. ) Shipping Weight: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1. 8 kg (4. 0 lb) Specifications: Versions Available: UW30 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 feet of cable (30. 48 m) System Type: . . . . . . . . . . . . . . . . . . . . . . . . . . . . Underwater loudspeaker system Frequency Response: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100-10, 000 Hz Power Handling, (500-5, 000 Hz pink noise): . . . . . . . . . . . . . . . . 30 watts Impedance: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] 2128, Australia, Phone: 61/2-9648-3455, FAX: 61/2-9648-5585 Unit E & F, 21/F, Luk Hop Industrial Bldg. , 8 Luk Hop St. , San PO Kong, Kowloon, Hong Kong, Phone: 852-2351-3628, FAX: 852-2351-3329 2-5-60 Izumi, Suginami-ku, Tokyo, Japan 168, Phone: 81-3-3325-7900, FAX:81-3-3325-7789 3015A Ubi Rd 1, 05-10, Kampong Ubi Industrial Estate, Singapore 408705, Phone: 65-746-8760, FAX: 65-746-1206 Av. 53390, Phone: (52) 5358-5434, FAX: (52) 5358-5588 4, The Willows Centre, Willow Lane, Mitcham, Surrey CR4 4NX, UK, Phone: 44 181 640 9600, FAX: 44 181 646 7084 12000 Portland Ave South, Burnsville, MN 55337, Phone: 952-887-7424, FAX: 952-887-9212 12000 Portland Ave South, Burnsville, MN 55337, Phone: 952-887-7491, FAX: 952-887-9212 www. electrovoice. com · Telex Communications, Inc. [. . . ]