User manual ELECTRO-VOICE 74

[. . . ] Congratulations on your FRi-Series purchase!To get the most out of your FRi-Series investment, please read carefully through this entire FRi-Series guide. Inside you will find information that will help you achieve maximum product life, optimum performance, and a safe, successful installation. If you need more information, call your EV dealer or contact EV directly: Electro-Voice 12000 Portland Avenue Burnsville, MN 55337 U. S. A. [. . . ] An internal passive filter network shall provide component crossover and system equalization. Input panel shall be easily changeable from passive to biamp operation via internal connector. System frequency response shall be 62 Hz to 15 kHz (-3 dB) measured on axis. The loudspeaker shall produce a sound pressure level (SPL) of 97 dB on axis at 1 meter with a power input of 1 watt, and shall be capable of producing a full-power long-term average output of 122 dB on axis at 1 meter. It shall handle 300 watts of amplifier power long-term (EIA Standard) and shall have a nominal impedance of 8 ohms. The loudspeaker enclosure shall be trapezoidal in shape with side draft angles of 15 degrees each. It shall be constructed of 13 ply void-free cross-grain-laminated Birch plywood and shall employ extensive wooden bracing. It shall be finished in black or white acrylic paint or available unfinished. Input connectors shall be two 2-terminal barrier strips. A total of twelve 3/8-16 threaded mounting/suspension points shall be provided, (three each on top and bottom, two per side, two on rear). The front of the loudspeaker shall have a powder-coated perforated 16 GA steel grille. Grille mounting shall allow for acoustically transparent fabric to be applied without any noticeable protrusions or fasteners. Electro-Voice Speakers and Speaker Systems are guaranteed against malfunction due to defects in materials or workmanship for a period of five (5) years from the date of original purchase. The Limited Warranty does not apply to burned voice coils or malfunctions such as cone and/or coil damage resulting from improperly designed enclosures. Electro-Voice active electronics associated with the speaker systems are guaranteed for three (3) years from the date of original purchase. Additional details are included in the Uniform Limited Warranty statement. 5 Installation Environments F R i SPEAKER SYSTEMS Interior Installation The standard FRi cabinets are constructed for indoor installation to provide years of trouble-free service. The paint on the cabinets is textured and highly durable. Should you endeavor to paint your cabinet another color, clean and prep the cabinet as you would following standard painting practices. The metal grille on the cabinets is designed to accommodate custom-colored, acoustically transparent fabrics which wrap neatly around the grille and is held in place by U-channels (included). This allows the flexibility to match most interior design requirements. We suggest the use of acoustically transparent fabrics as supplied by Stevenson & Lawyer (Tel. 1-800-968-5535) or equivalent to ensure maximum performance and safety. Outdoor Installation Should your application call for outdoor installation, locate the cabinet to provide protection from direct exposure to sunlight, rain and other weather conditions. 6 Rigging F R i SPEAKER SYSTEMS Installation of the Shoulder Eye Bolts Rigging of the FRi-Series is done with readily available 3/8-16 forged shoulder eye bolts. To install the eye bolts, follow these steps: 1. [. . . ] (Settings for the Dx38 are available on the EV Web site: www. electrovoice. com. ) Typical FRi Input Panel All FRi full range enclosures feature very high quality barrier strip input terminations for ease of installation and secure connections. 12 Basic Configurations F R i SPEAKER SYSTEMS Recommended Configurations for FRi Systems · Bi-amp Operation · All Passive Operation · Tri-amp Operation BEST BETTER NOT RECOMMENDED AUDIO INPUT OPTIONAL PROCESSING BI-AMPED MONO ARRAY AMPLIFIER Due to the inherent designs and efficiencies of the FRi systems, there is no cost effective reason to utilize all active operation in either mono or stereo mode. Actual cost of electronics and amplification will be determined by the total number of FRi cabinets configured within the array. Due to load requisites some array configurations may not be feasibly powered in all passive mode with typical amplifiers available. CROSSOVER Cost Effective Fidelity for the FRi System Based on cost effectiveness of the entire system (loudspeakers, processors, amplifiers), bi-amp operation combines the overall best frequency response and value. In simpler stereo applications with one full range and one sub per side, we would recommend a bi-amped mode of operation for performance; however, all passive configurations will typically supply adequate fidelity at an extremely cost effective means. [. . . ]