User manual ELECTRO-VOICE ADH-1

[. . . ] RMDTM, or Ring Mode Decoupling, employees mechanical and acoustical equalization to resolve system resonances (or ringing modes) and frees electrical equalizers to perform the job they were originally intended to perform, that being room equalization and correction of the spectral characteristics inherent in the tranducers themselves. Prior designs have frequently attempted to "resolve" loudspeaker design issues with electrical equalizers. RMDTM substantially improves system transient detail and further refines system clarity. The unique performance enhancements and system capabilities are ideally suited to the high dynamic-range demands of digital material. [. . . ] Attach the strips to the up-side down speaker as shown in figure 1. Remove the locking brace the low frequency acessory bag and attach it to the back of the unit right side up. ______________________ 1 THX is a registered trademake of Lucasfilm Ltd. * The Variplex-XL is THX approved for, screen to last row distances, greater than 80 feet 2 U. S. Patent 5, 020, 630, Loudspeakers & Horn Therefor. VariplexTM-XL 3-Way Screen System Figure 1--Low Frequency Speaker Assembly VariplexTM XL 3-Way Screen System VariplexTM-XL 3-Way Screen System 4. Slide to two units together, with the backs almost touching and the front slightly appart. Engage the brace to the other speaker and tighten the bolt. Pass the 1/4-20 x 1 1/2 inch bolts through the holes opposite the T-nuts in each of the enclosures front baffle inside edge. (see figure 1) Tighten bolts unitl a 1/16 inch remains between the two enclosures. Now that the Low frequency units are attached, the input panels can be connected. (See Figure 2 for referance) There are three wiring configurations possible. The speakers maybe wired in Series with one amp channel input or wired in Parallel with one amp channel input. Sound pressure levels drop off drastically above zero on axis. Crossover Equalization The Electro-Voice Dx38 digital electronic crossover system may be used to crossover equilize and set time delay for the VariplexTM-XL. Figure 6 is a typical transfer curve based on the indivdual frequency responses of its components as shown in figure 4. Further data on these setting may be obtained by contacting Electro-Voice for information on specific Dx38 presets. VariplexTM XL 3-Way Screen System Figure 3--Mounting the HPK-VARIPLEXTM-XL (pre-assembled mid/high unit) VariplexTM-XL 3-Way Screen System Frequency Response Figure 5 shows VariplexTM-XL frequency response with presets of the Electro-Voice Dx38 digital electronic crossover system processor (see Crossover Equalization section). The measurement was made with a swept sine-wave signal, 4 volts at 500 Hz, in an anechoic (echoless) environment. The microphone was at a distance of 3. 048m (10 ft), on an axis with the aiming pointof the Mid/ Hi-frequency unit. Figure 5 shows the frequency response of the individual sections of the VariplexTM-XL, measured under the same conditions but at 1 watt at 2 meters. The results of which were then normalized to 1 watt/1 meter at 500Hz. Uniform Limited Warranty Statement Electro-Voice products are guaranteed against maltunction due to defects in materials or workmanship for a specified period, as noted in the individual productline statement(s) below, or in the individual product data sheet or owner's manual, beginning with the date of original purchase. If such maiflinction occurs during the specified period, the product will be repaired or replaced (at our option) without charge. The product will be returned to the customer prepaid. [. . . ] (Midway between Mid-Frequency horn and High Frequency horn) Decibels (dB) Frequency Figure 5--VARIPLEXTM-XL System Typical Frequency Response with DX38 (Digital Speaker System Precessor) Presets: Swept sine -wave input, under anechoic environment, (normialized repsonse, for 4 volts, 10 feet at 600hz, with the Microphone axis coincident with the aiming point. (Midway between Mid-Frequency horn and High Frequency horn) Decibels (dB) Frequency VariplexTM-XL 3-Way Screen System owner's manual; (d) malfunction resulting from misuse or abuse of the product; or (e) malfunction occurring at any time after repairs have been made to the product by anyone other than EVI Audio Service or any of its authorized service representatives. Obtaining Warranty Service: To obtain warranty service, a customer must deliver the product, prepaid, to EVI Audio Service or any of its authorized service representatives together with proof purchase of the VariplexTM XL 3-Way Screen System product in the form of a bill of sale or receipted invoice. A list of authorized service representatives is available from EVI Audio Service at 600 Cecil Street, Buchanan, MI 49107 (800/234-6831 or FAX 616/695-4743). [. . . ]