User manual JBL DD 66000

[. . . ] Project Everest DD66000 Product Commentaries and User Guide Thank you for purchasing the Project Everest DD66000 loudspeaker system. Before using the system, please take the time to read through this user guide to understand this product well and also to use it properly. 2 Project Everest DD66000 Table of Contents Preface. . . 5 Chapter 1 Legacy. . . 7 Chapter 2 Project Everest DD66000. . . 11 Chapter 3 Unpacking. . . 19 Chapter 4 Selecting Cable. . . 21 Chapter 5 Amplifier Recommendations. . . 23 Chapter 6 Placement and Setup Considerations. . . 25 Chapter 7 Switch Operations. . . 27 Chapter 8 Connections. . . 33 Chapter 9 Care and Maintenance. . . 37 Chapter 10 Troubleshooting and Service Guide. . . 39 Project Everest DD66000 Specifications. . . 41 3 4 Project Everest DD66000 PREFACE Thank you for selecting the Project Everest DD66000 loudspeaker system. It represents the culmination of our research and developmental efforts in sound reproduction over the last half century. We have labored to create a loudspeaker system with no acoustical or electrical limitations whatsoever. [. . . ] We recommend using an audiophile-quality speaker wire of not less than 16gauge for connections of up to 15 feet (5 meters) as a minimum requirement. Project Everest specialist dealers have the experience and knowledge to recommend suitable speaker wire to best complement a particular system. For maximum signal purity, it is advisable to place the amplifier(s) as close as possible to the loudspeakers, even if this means that a longer distance will be needed between the amplifier(s) and preamplifier. The left and right speaker/amplifier connections should be the same length. If the distance between one speaker and the amplifier(s) is greater than the other speaker and amplifier(s), use the longer length of wire for both connections. For bi-wire connections, the same type of wires may be used for both low-frequency and high-frequency sections to reduce wire effects (resistance, inductance, etc. ) and to avoid intermodulation of low and high frequencies in the wires. Specialized wires for low-frequency and high-frequency 21 sections may yield excellent results. Whatever wires are used, be sure that the low-frequency wires are as short as possible, and the left and right wires for each section are the same length. To ensure a secure connection, we recommend Y- or U-type plugs. 22 Project Everest DD66000 CHAPTER 5 Amplifier Recommendations No single type of amplifier is specified for use with the Project Everest DD66000 system. The speakers are highly efficient and will operate adequately with an amplifier or receiver of 70 ­ 100 watts. However, the transient response and audio definition of a high-end system such as Project Everest DD66000 will pick up all the inefficiencies and distortion in an amplifier system. For full-range operation, the Project Everest DD66000 system should not be used with an amplifier/receiver of less than 100 watts. High-quality amplifiers/receivers of 100 ­ 500 watts will ensure optimal system performance. There is no effective limit to the power handling capabilities of the Project Everest DD66000 loudspeakers when driven by consumer audio amplifiers. No damage will occur when used with high-powered components. Source impedance is an important criterion in selecting an appropriate unit; the selected amplifier(s) should have a very high current capacity and must be capable of driving a low-impedance load. For bi-wiring or bi-amplification applications, four identical amplifiers or two dual-channel units may be used, although specialized low-frequency and highfrequency amplifiers offer clear advantages. (If four amplifier channels are used, the high-frequency amplifier may be up to 6dB less powerful than the low-frequency amplifier. Due to the power-versus-frequency distribution of the music, the low-frequency section requires approximately four times the power of the high-frequency section. ) Project Everest DD66000 dealers can recommend amplification to best suit individual needs. In all cases, the left and right amplifiers for each section must be identical. Make sure that the input sensitivity of the two amplifiers is equal or that input level controls are provided to maintain the proper low to mid/high balance. If two identical stereo amplifiers are chosen, each amplifier may be located near a loudspeaker and drive low-frequency and high-frequency sections through short wire runs. 23 A separate crossover network (not included) should be connected directly to the low- and high-frequency amplifiers driving this system, and is required if the system is to be bi-amplified. 24 Project Everest DD66000 CHAPTER 6 Placement and Setup Considerations The Project Everest DD66000 loudspeaker system is designed to be less affected by room acoustics than conventional imaging systems. [. . . ] If the enclosure becomes noticeably scratched or otherwise damaged, consult a qualified furniture repair shop. All wiring connections should be inspected and cleaned or remade periodically. The frequency of maintenance depends on the metals involved in the connections, atmospheric conditions, and other factors. Consult your Project Everest DD66000 dealer for specific recommendations. 37 38 Project Everest DD66000 CHAPTER 10 Troubleshooting and Service Guide Project Everest DD66000 loudspeakers are designed to provide years of trouble-free service. [. . . ]