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JBL Project Everest DD66000 User Manual

Jbl everest dd66000: owners manual
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DD66000
Project Everest
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.

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Summary of Contents for JBL Project Everest DD66000

  • Page 1 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.

  • Page 3: Table Of Contents

    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...

  • Page 5: Preface

    We have labored to create a loudspeaker system with no acoustical or electrical limitations whatsoever. While the Project Everest DD66000 is itself a new development, the goal that it achieves goes back to the earliest days of the original James B. Lansing Sound Company.

  • Page 7: Legacy

    At JBL, this has happened eight times. In each case, our engineers were told to build the speaker system they had always wanted to build. Whatever resources were required would be made available.
  • Page 8 Project Everest DD66000, the most advanced and sophisticated loudspeaker in the world today, is the latest expression in technology that is deeply rooted in more than 60 years of tradition. JBL’s president in 1954, William Thomas, described the Hartsfield as the “speaker system we have always wanted to build [with] the finest components ever made available to serious listeners.”...

  • Page 9: Project Everest Dd66000

    It was in this environment that JBL set out to create its fourth and fifth Project loudspeakers, K2 S9500 and K2 S5500. As with Hartsfield, the simplicity of a two-way system was considered the most promising design track.
  • Page 10 The development of the Project Everest DD66000 loudspeaker system was undertaken as a celebration of JBL’s 60 anniversary and as a realization of the potential engendered by the breakthroughs discussed above.

  • Page 11: Project Everest Dd66000

    The following sections describe the primary features and components of the Project Everest DD66000 loudspeaker system. The basic system configuration is what JBL historically has referred to as an augmented two-way. In the 1950s and 1960s, JBL primarily built two-way systems with a 12- or 15-inch (305mm or 380mm) woofer crossed over to a large-format compression driver/horn combination.
  • Page 12 The transducers, horns and crossover networks are housed in a visually stunning enclosure that is reminiscent of both the Hartsfield and Paragon systems. The specially curved baffle provides the sidewalls for the main horn. The top and bottom horn flares are accomplished by the attachment of ®...
  • Page 13 Project Everest DD66000 The 1501AL and 476Be are both designed to be absolute-minimum-distortion drive units. Although they are capable of tremendous acoustic output, they are designed to be completely linear in every way, up to a reasonable drive level. This enables the system to sound the same, regardless of playback level.
  • Page 14 This material is insensitive to temperature changes and back EMF from the coil. JBL has overcome the tendency of alnico to demagnetize with high drive by utilizing a massive shorting ring at the base of the motor assembly. The top plate is constructed of alternating copper-steel laminations.
  • Page 15 This fully vented frame and motor design also serves to minimize the back pressure under the dome and spider, helping to reduce harmonic distortion ™ to even lower levels. JBL’s Vented Gap Cooling (VGC) is incorporated within the motor structure, and lowers the operating temperature of the coil during moments of high power operation.
  • Page 16 This process enables the integrated JBL diamond-pattern surround to be formed as one piece with the dome. Compared to other methods, forming the diaphragms out of sheets of beryllium foil yields greater reliability and resistance to failures due to fatigue.
  • Page 17 The single-layer aluminum-ribbon voice coil is wound without a former and is attached directly to the diaphragm. The driver employs the smallest annular-slit phasing plug that JBL has ever designed. The 045Be-1 has been designed to improve manufacturing yield and consistency. Small changes have been made to the top plate and some significant improvements were made to the surround shape and clamping methodology.
  • Page 18 Internal Crossover Network The circuit topology, combined with the acoustic behavior of the 1501AL and 476Be, provides a 24dB-per-octave transition at 700Hz. This is the primary crossover point of the system. Additionally, the 045Be-1 is turned on above 20kHz to provide extended response to beyond 50kHz. A second 1501AL woofer is used from below 30Hz to around 150Hz, at which point it is gently rolled off at 6dB per octave.

  • Page 19: Unpacking

    CHAPTER 3 Unpacking the Project Everest DD66000 System All components of the Project Everest system have been very carefully packed for maximum protection against damage. As with any superior audio product, it is advisable to keep the original packing materials, in case it is necessary to transport the Project Everest system.
  • Page 20 Grille Removal The Everest DD66000 is shipped with its grille on the system. You can remove the grille with the following procedures. Step 1: Hold the lower parts of the grille with both hands and pull it up.

  • Page 21: Chapter 4 Selecting Cable

    The Project Everest loudspeakers are internally wired with proprietary, high- quality copper cables, specially designed for JBL. The same care that was given to the selection of the internal system wiring should be afforded to the selection and application of the cables that will connect Project Everest loudspeakers to other system components.
  • Page 22 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.

  • Page 23: Chapter 5 Amplifier Recommendations

    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.
  • Page 24 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.

  • Page 25: Chapter 6 Placement And Setup Considerations

    If the distance between the floor and ceiling is minimal, it is preferable that one surface has an absorbent covering. With Project Everest DD66000, it is very important to be able to accommodate the optimal listening area that is defined by the 100°...
  • Page 26 Floor Requirements The floor at the location selected for setting up the Project Everest DD66000 speakers must be capable of supporting a load of 308 lb (140kg). Because of the coupling effect of the stainless-steel feet, a flat, hard surface such as wood or linoleum is preferable.

  • Page 27: Chapter 7 Switch Operations

    Project Everest DD66000 CHAPTER 7 Project Everest DD66000 Switch Operations The DD66000 has two control panels under the cover at the center bottom of the front baffle. Shorting bars or switches inside the control panel allow you to switch orientation of the system, engage bi-amplification if desired and adjust woofer and high-frequency levels.
  • Page 28 One system should be set to “left” and positioned as the left speaker system. The other system should be set to “right” and positioned as the right speaker. HF Drive/LF Drive This allows you to switch between normal drive (using a set of amplifiers) and bi-amp drive (using two sets of amplifiers).
  • Page 29 Project Everest DD66000 HF Level This switch adjusts the attenuation applied to the 476Be (high-frequency unit) by approximately 0.5dB over the range of 1,000Hz to about 8,000Hz. The action is accomplished by trimming the main attenuation resistors. Midrange sound becomes softer by reducing the level and stronger by increasing the level.
  • Page 30 Battery Installation The network of this system utilizes the proprietary JBL “charge-couple method” to activate capacitors by applying DC bias using battery power; this eliminates unwanted distortions. Please refer to procedures below and install the supplied batteries in the battery holders.
  • Page 31 Project Everest DD66000 printed on the battery generally coincides with the need to replace the batteries. Each capacitor position is actually made up of two capacitors connected in series. The battery voltage is applied to the center connection of the two capacitors.

  • Page 33: Chapter 8 Connections

    All amplifiers must also be turned off before connecting or disconnecting cables at the amplifier or preamplifier inputs. All connections between the amplifier(s) and the Project Everest DD66000 loudspeaker system are made at the terminals located on the back of the enclosure.
  • Page 34 Two sets of input terminals of Project Everest DD66000 are designed for use with bi-wire and bi-amp connections. Read the following explanations and use the suitable method.
  • Page 35 • Make sure the system orientation and HF/LF drive switching in the control panel are correctly set. The system is now ready for use. The Project Everest DD66000 loudspeaker system is fully functional as soon as it is set up. There may be subtle tonal changes in bass output over the first week to 10 days of operation.

  • Page 37: Chapter 9 Care And Maintenance

    CHAPTER 9 Project Everest DD66000 Care and Maintenance The Project Everest DD66000 loudspeaker system requires no maintenance other than occasional dusting with a soft, dry, lint-free cotton cloth. The horns may also be wiped with a soft cloth. Treat the lacquered surface very carefully to avoid scratching the finish.

  • Page 39: Chapter 10 Troubleshooting And Service Guide

    Project Everest DD66000 CHAPTER 10 Troubleshooting and Service Guide Project Everest DD66000 loudspeakers are designed to provide years of trouble-free service. No maintenance, aside from occasional battery replacement, is required. If a problem occurs, make sure that all connections are properly made and clean.

  • Page 41: Project Everest Dd66000 Specifications

    The Project Everest DD66000 System Specifications Low-Frequency Driver High-Frequency Driver Ultrahigh-Frequency Driver Maximum Recommended Amplifier Power Frequency Response (– 6dB) Low-Frequency Extension (–10dB) Nominal Impedance Sensitivity (2.83V@1m) Horn Directivity (Horizontal x Vertical) High-Frequency Ultrahigh-Frequency Crossover Frequency Control Function Dimensions (H x W x D)
  • Page 42 JBL and Harman International JBL is part of the Harman International audio companies, a group with a common purpose: combining technology with a love of music to manufacture audio products that provide new levels of satisfaction, performance and value. To promote variety and creativity, JBL operates independently in research and development.

This manual is also suitable for:

Dd66000ch-everest ii [dd66000ch]Dd66000ma-everest ii [dd66000ma]Dd66000rw-everest ii [dd66000rw]

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