User manual ELECTRO-VOICE 4400

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Manual abstract: user guide ELECTRO-VOICE 4400

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

[. . . ] Xi-1122/85: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Xi-1152/64: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Xi-1152/94: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . X-Array Install Three-Way Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] As in the two-way systems, the filter block in the subwoofer channel is used to provide a subsonic high-pass filter, a low-pass crossover filter, equalization and phase alignment for the subwoofers. As before, one subwoofer channel contains a two-to-one combiner for optional mono bass, and the other a selector to choose either right or left inputs. Both subwoofer paths also contain a 0- to-1350 ms delay block, and a six-band filter. CAUTION: When using the three-way systems with a conventional three-way crossover (i. e. , no overlap between the low and mid sections) the user may make minor adjustments to the factory QuickMAP parameters in the audio-path equalization and digital-output levels in any of the frequency bands with minimal risk to the loudspeaker system. When using the three-way systems with the overlap three-way crossover (i. e. , where the low and mid sections overlap for increased directivity), the user must not make any changes to any of the factory QuickMAP parameters (crossover, level, equalization, phase) in the low and mid channels because it will upset the acoustic summation in the overlap region. Minor changes may be made, however, in the parameters in the audio-path equalization and digitaloutput levels in the subwoofer and high channels. In either the overlap or non-overlap configurations, changing limiter protection parameters (including limiter block, and look-ahead delay block) from the factory QuickSET values may result in driver failures. QuickMAP Timing, System Synchronization, and Latency Because of the digital nature of the ISP-100, the processor contains inherent delays, both fixed and user adjustable, which must be accounted for in speaker system and array setup and alignment. These delays are not only significant for woofer, midrange, and horn acoustic alignment in one specific system, but particularly important to consider when combining different types of systems such as two-way plus three-way, or woofers plus subwoofers, etc. If these delays are not properly accounted for and/ or properly set, it can have a quite detrimental impact on system frequency response and directional characteristics. Each of the QuickMAP Merlin X-Array Install Manual FIGURE Electro-Voice X-Array Install 6 - 3-Way Quick Map Merlin ISP-100 3-Way Quick Map File: xi-3way. qms FILTER SET 8 Bands (Filter_a_Low) LIMITER (Limiter_a_Low) DITHER (Dither_a_Low) LOW OUT Channel a (Out_5a) (Vers. This is particularly true for the limiter/protection blocks (see additional cautions in the previous section). The name of each QuickSET contains a fourletter code which indicates which of four alternate configurations are included. Each letter of the code can be either "Y" or "N", for yes or no. woofer-midrange overlap, which applies only to the three-way systems (first letter), 2. Note that if a subwoofer is not being used, the woofer(s) of the two- or three-way system will be used down to their natural limits, rather than being high-passed at a higher frequency. Although subwoofer-woofer overlap naming capability is included, QuickSETs for this operation are reserved for future release, and are not included here. 5. 1 Two-Way Projects These projects use QuickMAP: XI-2WAY. QMS 5. 1. 1. Stereo Xi-1122/85 with Dual Xi-1191 Subs Project name: Xi-1122/85 5. 1. 1. 1. QuickSET for conventional two-way configuration with subwoofers having normal tuning QuickSET name: Xi-1122/85 NNNY 5. 1. 1. 2. QuickSET for conventional two-way configuration with subwoofers having step-down tuning QuickSET name: Xi-1122/85 NNYY 5. 1. 1. 3. QuickSET for conventional two-way configuration without subwoofers QuickSET name: Xi-1122/85 NNNN 5. 1. 2. Stereo Xi-1152/64 with Dual Xi-1191 Subs Project name: Xi-1152/64 5. 1. 2. 1. [. . . ] Threshold Setting Determined from Power Amplifier Gain Using the previously determined amplifier gain value in dB, the limiters threshold may be calculated from the factory recommended values given in the QuickSETS described earlier. If your power amplifier gain is different from the assumed gain, a new threshold value must calculated. If your amplifier gain is greater than the assumed value, the recommended threshold must be reduced by the exact amount of dBs that your amplifier exceeds the assumed gain, and vice versa. Example: The recommended limiting threshold is -25 dB and your measured amplifier gain is 45 dB. [. . . ]

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