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Manual abstract: user guide ELECTRO-VOICE MH660P EDS

Detailed instructions for use are in the User's Guide.

[. . . ] Ring-Mode Decoupling (RMDTM) Technology The MH6040AC controls both acoustical and mechanical ring modes to provide dramatically increased intelligibility, using techniques learned from the development of the Electro-Voice X-Array concert speakers. There is much less coloration of the sound from resonating sources, leaving only the intended sound to be heard by the audience. Installation The MH6040AC is designed to be suspended safely and easily. The integral mounting brackets at the rear should be used as the main structural hanging location. [. . . ] If the MH6040AC is suspended, it is recommended that the unit be inspected at least once a year. If any sign of weakness is detected, remedial action should be taken immediately. Equalization and Subpassband Protection The MH6040AC's mid-bass section exhibits typical constant-directivity horn characteristics, i. e. , roll-off at the frequency extremes. At higher frequencies, the roll-off approximately matches the power-response of the DL10X-SH (6 dB per octave). At lower frequencies, directivity is lost when the mouth is no longer large enough to maintain directional control. These two consequences can be observed in the "humped" response in Figure 3. Equalization can be easily applied with a graphic equalizer to give a flat response. The high-frequency compression driver can be equalized with a graphic equalizer or an EQ module inserted into the Electro-Voice XEQ-2 (two-way) or XEQ-3 (two-way or three-way) active crossover/equalizer. The EQ module should be selected to suit the particular compression driver and the HP640 horn (see relevant data sheet). Because of its use in large arenas, where air loss can be significant, it is recommended that the system be equalized "on site" for optimum results. The XEQ-3 and the mid-bass EQ module from the EQMT-2 can be used to provide a good starting point for the equalization. During this test, the mid-band section is not high passed at 1, 250 Hz. The highfrequency section's power handling is dependent on the selected driver combination. Architects' and Engineers' Specifications The horn shall be of the constant-directivity type. It shall produce a horizontal beamwidth (6-dB-down angle) of -60°, deviating no more than +10° or ­20° from this angle over the range of 400 Hz to 20 kHz. It shall produce a vertical beamwidth of 40°, deviating no more than +20° or ­15° over the frequency range of 325 Hz to 20 kHz. The MH6040AC mid-bass section shall operate over the range of 100 Hz to 4, 000 Hz, with a recommended crossover frequency of MH6040AC Coaxial Constant-Directivity Manifold Technology® Horn System 2 MH6040AC Coaxial Constant-Directivity Manifold Technology® Horn System 1, 250 Hz, and be driven by two 10-inch, weather-resistant drivers with high-technology cones of Kevlar® and epoxy. 1 The patented Manifold Technology® technique shall be exploited and result in a power-handling capacity of 600 watts per EIA Standard RS426. The average axial sensitivity shall be 105 dB SPL at 1 meter with 2. 83 volts applied. The frequencies above 1, 250 Hz shall be produced by the supplied Electro-Voice HP640 TransPlanar TM constant-directivity horn with user-selectable driver combinations. The horn bell manifold chamber and back covers shall be constructed of fiberglass, foam and polyester resin. Two steel mounting rails shall be provided to coaxially mount the Electro-Voice HP640 horn. The horn shall have an integral rear mounting bracket made of black powder-coated 10-gauge steel. [. . . ] Obtaining Warranty Service: To obtain warranty service, a customer must deliver the product, prepaid, to Electro-Voice Service or any of its authorized service representatives together with proof of purchase of the product in the form of a bill of sale or receipted invoice. A list of authorized service representatives is available from Electro-Voice Service at 600 Cecil Street, Buchanan, MI 49107 (800/234-6831 or FAX 616/695-4743). Incidental and Consequential Damages Excluded: Product repair or replacement and return to the customer are the only remedies provided to the customer. Electro-Voice shall not be liable for any incidental or consequential damages including, without limitation, injury to persons or property or loss of use. [. . . ]


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