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Фрагмент инструкции
Do not overload wall outlets, extension cords, or integral convenience receptacles, as this can result in a risk of fire or electric shock. 20. Never push objects of any kind into this product through openings, as they may touch dangerous voltage points or short-out parts that could result in a fire or electric shock. Never spill liquid of any kind on the product. 21. The apparatus shall not be exposed to dripping or splashing, and no objects filled with liquids, such as vases, shall be placed on the apparatus. 22. Do not attempt to service this product yourself, as opening or removing covers may expose you to dangerous voltage or other hazards. Refer all servicing to qualified service personnel. 23. When replacement parts are required, be sure the service technician has used replacement parts specified by the manufacturer or that have the same characteristics as the original part. Unauthorized substitutions may result in fire, electric shock or other hazards. 24. Upon completion of any service or repairs to this product, ask the service technician to perform safety checks to determine that the product is in proper operating condition. 25. The product should be mounted to a wall or ceiling only as recommended by the manufacturer. Note to CATV system installer: This reminder is provided to call the CATV system installer’s attention to Article 820-22 of the NEC that provides guidelines for proper grounding and, in particular, specifies that the cable ground shall be connected to the grounding system of the building, as close to the point of cable entry as practical. Figure A. Example of Antenna Grounding as per National Electrical Code ANSI/NFPA 70 3 SDEC3000.4500.om.qxd 4/16/09 10:06 AM Page 4 INTRODUCTION AND FEATURES INTRODUCTION Congratulations on your purchase of this JBL Synthesis® SDEC Digital Equalizer! You have chosen a product that embodies the best of what JBL, Inc., has discovered about the emotional power of audio reproduction in more than sixty years of preeminence in the field. This Digital Equalizer has been designed and crafted to provide the user with a high level of sonic performance. Special attention has been paid to minimize the number of components in the audio signal path, resulting in extremely low distortion, excellent transient response and wide dynamic range. Synthesis® products set new benchmarks in audio technology, and, when used as part of a complete JBL Synthesis system, will bring the ambience and acoustics of some of the world’s greatest concert halls and theaters into your home. To obtain the best performance from this Digital Equalizer, please be sure to completely read this user’s manual and use the SDEC Digital Equalizer only in accordance with its instructions. From its inception, JBL Synthesis has been the answer to the questions: “How do you build a state-of-the-art home theater system and make it sound superb in every installation?” and “How can you be sure all the hardware is compatible?” These were the big questions Synthesis components answered fifteen years ago. Today, JBL Synthesis systems move beyond the competition yet again. The JBL Synthesis Digital Equalizer (SDEC) is a 12-channel-in/20-channel-out 24-bit, 96kHz digital audio signal processor. Unlike nearly all other audio components on the market, the SDEC has been designed to work specifically with other Synthesis system components. This narrow application focus has allowed JBL engineers to design a product with far fewer compromises, resulting in unequalled system performance. By reading the following pages, you will become familiar with the technological features and unique capabilities incorporated within the SDEC and available nowhere else. Until now, anything beyond the most basic equalization has been impossible without expensive acoustical instrumentation and the knowledge to use it. This is why, traditionally, equalizers have been general-purpose devices, designed to be applicable to any audio system, and usually doing more harm than good! Add to this situation the fact that equalizing a speaker system by ear is truly a futile exercise. This helps to account for the generally low acceptance of equalizers outside of professional audio applications. FEATURES • Up to 256 bands of fully parametric EQ • Built-in crossover for bi-amp outputs (SDEC-4500 only) • Delay adjustment for each output • Delay adjustment for driver compensation • Screen compensation • Driver compensation • Web-based Java remote for basic system setup • Windows application for advanced system setup • Custom configuration possible • Remote VPN monitoring • Four subwoofer outputs (SDEC-4500 only) • Three pairs of side speaker outputs for large rooms with multiple rows of seating (SDEC-4500 only) • 24-Bit DSP • 96kHz sample rate on all inputs and outputs • Balanced or single-ended (unbalanced) inputs and outputs 4 SDEC3000.4500.om.qxd 4/16/09 10:06 AM Page 5 DETAILED DIAGRAM –FRONT PANEL . INPUT/OUTPUT CARD MONITORING Each channel ha...
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