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JBL DD66000CH-EVEREST II [DD66000CH], Руководство пользователя

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14

Figure 2 – 1501AL section view

The 1501AL low-frequency driver is a 15-inch (380mm)-diameter device with
a 4-inch (100mm) voice coil completely immersed in a radial field generated by
an alnico 5DG magnet. Alnico was chosen because of its stable operating point.
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. The presence of the
copper rings linearizes the magnetic properties of the gap to all but eliminate
eddy current distortion.

The outer suspension is made of EPDM foamed rubber, which has the longevity
and frequency response characteristics of traditional rubber surrounds, but with
a low density very close to that of foam surrounds. Low-loss EPDM material
was chosen so that the transient detail of musical signals could be preserved.
Dual inverted Nomex

®

 spiders are employed for the cancellation of even-order

distortion components. All suspension elements are tailored for maximum
mechanical displacement linearity.

The cone consists of a special layered paper-pulp matrix with proprietary
Aquaplas damping, which offers more pistonic behavior throughout the
woofer’s operating bandwidth, and controlled cone breakup beyond it.

Содержание DD66000CH-EVEREST II [DD66000CH]

Страница 1: ...ommentaries 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 ...

Страница 2: ...2 ...

Страница 3: ...pter 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 ...

Страница 4: ...4 ...

Страница 5: ...loudspeaker selecting the correct location speaker wire wiring method and amplification and connecting it to its associated electronics This information will be found in Chapters 3 through 7 In addition we have included a detailed description of your Project Everest DD66000 loudspeakers Chapter 2 so that you may become thoroughly acquainted with the unique design and technical features Despite the...

Страница 6: ...6 ...

Страница 7: ... Hartsfield Paragon Everest DD55000 K2 S9500 7500 K2 S5500 K2 S9800 and K2 S5800 The newest is Project Everest DD66000 Although differing in performance details and physical attributes all of the Project loudspeakers have shared a common objective to elevate sound reproduction to levels defined only by the limitations of existing materials and technology The fact that all Project loudspeakers have...

Страница 8: ... every bit of trouble necessary to build a system precisely to the design He added It isn t easy but that s the way it is done The Ranger Paragon JBL s second Project system was the first serious attempt at a reflecting speaker system and broke ground in the new concept of stereo imaging Basically two independent full range speaker systems installed in a handsome curved cabinet nearly 9 feet 2 7 m...

Страница 9: ...er design and low frequency alignment would make possible the construction of a two way system of unprecedented physical and acoustical scale Our engineers took the core components the low and high frequency drivers and optimized them by redesigning their magnetic structures diaphragms and framework for greater linearity dynamic capability and transient response In the years following the introduc...

Страница 10: ...rtion even at extremely high drive levels The development of the Project Everest DD66000 loudspeaker system was undertaken as a celebration of JBL s 60th anniversary and as a realization of the potential engendered by the breakthroughs discussed above The stately character of the Hartsfield exceptional woodcraftsmanship of the Paragon the built in acoustics which treat the enclosure as an extensio...

Страница 11: ... The DD66000 has a single midrange crossover at 700Hz blending one 1501AL woofer to the 476Be compression driver and horn combination The 045Be 1 UHF driver is brought in at 20kHz to cover an octave and a half of ultrasonic frequencies A second 1501AL operates in the bass frequency range from below 30Hz to around 150Hz where it is rolled off at a gradual 6dB octave The first order slope ensures pr...

Страница 12: ...ffle module is a six sided shell constituting an extremely rigid and secure structure A leather covered outer baffle is then applied giving the total combined woofer baffle a thickness of 1 3 4 inch 45mm The outer baffle is removable to enable repair or replacement of the leather surface should that ever be necessary The system is ported on the rear with a tuning frequency of 34Hz Two large 4 inch...

Страница 13: ...iver is very similar to the 1500AL used in the K2 S9800 system It incorporates a new high impedance voice coil to allow a pair of woofers to be used while still maintaining an 8 ohm system impedance The voice coil length has been increased to 1 3 16 inch 30 5mm from 13 16 inch 20 3mm and its milling width has been reduced slightly This was done to allow greater clearance from the outer diameter of...

Страница 14: ...nearizes the magnetic properties of the gap to all but eliminate eddy current distortion The outer suspension is made of EPDM foamed rubber which has the longevity and frequency response characteristics of traditional rubber surrounds but with a low density very close to that of foam surrounds Low loss EPDM material was chosen so that the transient detail of musical signals could be preserved Dual...

Страница 15: ...educed power compression and more consistent spectral balance with varying input drive level 476Be High Frequency Compression Driver and Bi Radial Horn The 476Be high frequency compression driver makes use of a 4 inch 100mm diameter pure beryllium diaphragm with a 4 inch 100mm aluminum edge wound coil operating into JBL s existing rapid flare type coherent wave phasing plug The use of an efficient...

Страница 16: ...ming the diaphragms out of sheets of beryllium foil yields greater reliability and resistance to failures due to fatigue If breakage ever does occur the diaphragm does not shatter into pieces or harmful dust Beryllium has a stiffness to density ratio of about five times that of aluminum magnesium titanium and iron This maintains pistonic behavior up to 20 000Hz eliminating diaphragm modal breakup ...

Страница 17: ...ll changes have been made to the top plate and some significant improvements were made to the surround shape and clamping methodology As a result the driver has picked up nearly 5dB of increased output above 30kHz A section view of the 045Be 1 driver is shown in Figure 4 Figure 4 045Be 1 section view The extremely low mass of the moving system high magnetic flux density and high rigidity of beryll...

Страница 18: ...he electrical components are of the highest quality and exhibit the lowest internal loss The inductors used are air core so as not to introduce nonlinear hysteresis effects Capacitors are constructed using polypropylene foil which is known for having minimal distortion caused by dielectric absorption nonlinearities The mid high and ultrahigh frequency networks employ battery bias to operate the ca...

Страница 19: ...gly advise unpacking on a well protected surface such as a thick carpet or cardboard Your loudspeaker system is packed with a protective wrapping but this is omitted in drawings below I Cut the straps securing the carton with scissors or a knife Please be careful so that the cut straps don t spring up and hit your face or hand II Slowly lift the top cover up and remove it If there is not enough ro...

Страница 20: ...n case they are hard to loosen please use an 11 16 inch 18mm wrench Four metal coasters are also provided These are to be placed between the foot and the floor should further protection of the floor coverings be required 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 ...

Страница 21: ...ality to suit a range of budgets and applications We recommend using an audiophile quality speaker wire of not less than 16 gauge 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 ampli...

Страница 22: ...ellent 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 ...

Страница 23: ... 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 high frequency amplifiers offer clear advantages If four amplifier channels are used the high frequency amplifi...

Страница 24: ...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 ...

Страница 25: ...om the listening position to the speakers and the angles of the speakers The imaging qualities enable the speakers to be placed relatively far apart from each other but this weakens center imaging such as vocals Increasing the inward angle of the speakers toward the listener will improve the center imaging The listener should be centered in front of the speakers and furniture should be of an appro...

Страница 26: ...cannot be easily moved once they are installed 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 However the design of the loudspeakers coupling system along with the speake...

Страница 27: ...ng to the setup you prefer and then put the screws back Attention As loose mounting screws on the terminals could cause bad contact make sure that they are firmly attached However if you overtighten there is a risk of damaging the terminals themselves Please use the supplied hexagonal driver and tighten screws with reasonable torque by hand only Do not use powered screwdrivers of any type The foll...

Страница 28: ...quency sections Normally all three sets of bars two LF and one HF would be moved together It is possible to operate the system with just the low frequency system or the high frequency system set to Bi Amp In this circumstance it would be necessary to use a combination of an external dividing network and the internal network However this is not generally recommended Figure 6 shows the low frequency...

Страница 29: ... level in the range of 60Hz to 150Hz by about 0 5dB LF2 refers to the main woofer and will affect the output level in the range of 150Hz to 700Hz The purpose of these adjustments is to allow fine tuning of the mid bass and midrange response of the system to better integrate with varying room characteristics Normally the control bars of LF1 LF2 are moved together to get the maximum effect LF1 LF2 H...

Страница 30: ...ere is no current consumption in batteries Thus the battery life is the same as that for batteries with natural discharge about two years in alkaline batteries Only 006P rectangular 9V alkaline batteries may be used This battery can be easily found at electronic appliance stores and convenience stores Please Note The supplied batteries are for testing the bias function they should be replaced with...

Страница 31: ...ge is applied to the center connection of the two capacitors This produces a voltage potential between the two plates within the capacitor When the two parts are taken as a whole there is no DC voltage that appears across them but individually they are each biased The sonic result of the biasing is an increase in detail increased smoothness and considerably more natural resolution of sounds within...

Страница 32: ...32 ...

Страница 33: ...sitive conductor Use these same designations for all system wiring Always connect the conductors of the speaker wire appropriately to the corresponding negative and positive terminals on all system components This will ensure that all components will work together in phase Connecting the speakers out of phase will not damage them but will result in reduced low frequency output and impaired stereo ...

Страница 34: ... frequency wires to the upper terminals and low frequency wires to the lower terminals III Bi Amp Connection Method The bi amp connection method requires two amplifiers one for the low frequency unit and one for the high frequency unit and a crossover network By removing the shorting straps connections may be made in the following way Wires from the high frequency amplifier are connected to the up...

Страница 35: ...list Connect and plug in all other system electronics Check all connections In case of bi amping or bi wiring make sure both shorting straps are removed 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 ...

Страница 36: ...36 ...

Страница 37: ...dges apply a small amount of diluted ammonia free or alcohol free neutral detergent to the cloth and gently clean the surface Never use any abrasive cleaners or chemicals to clean the enclosure 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 ma...

Страница 38: ...38 ...

Страница 39: ...equired If a problem occurs make sure that all connections are properly made and clean If a problem exists in one loudspeaker reverse the speaker wires to the left and right speakers If the problem appears in the opposite speaker the cause is in another component or cable If the problem remains in the same speaker then the fault is in the loudspeaker In this event consult your Project Everest DD66...

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Страница 41: ...2Hz Nominal Impedance 8 Ohms 5 5 Ohms 85Hz 3 5 Ohms 40kHz Sensitivity 2 83V 1m 96dB Horn Directivity Horizontal x Vertical High Frequency 100º x 60º Ultrahigh Frequency 60º x 30º Crossover Frequency 150Hz LF1 6dB octave 700Hz LF2 24dB octave 20kHz UHF 24dB octave Control Function HF level control 0 5dB 0dB 0 5dB LF level control low high LF HF drive mode switch normal bi amp System orientation swi...

Страница 42: ...ull range of benefits JBL continually engages in research related to product development and improvement Because of this new materials production methods and design refinements may be introduced into existing products without notice For this reason any current JBL product may differ in some respect from its published description but will always equal or exceed the original design specifications un...

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