A high purity copper sleeve is used for the pole piece. This greatly improves the electrical conductivity of the copper sleeve for lower coil inductance and thus greater high frequency output at 15 kHz and above. The copper sleeved pole quickly wicks away heat generated by the coil and contributes in reduction of dynamic power compression. To compensate for the higher reluctance gap caused by the use of a copper sleeved pole piece, large magnet area was used in conjunction with special high-grade and high-temperature grade Neodymium.

The Phasing plug is of JBL’s traditional Rapid Flare, Coherent Wave 4-slot design. This Coherent Wave design shapes the wave output producing a truly coincident wave front as the sound enters the horn.

The diaphragm is formed of pure Beryllium foil that is manufactured with a proprietary, high temperature and pressure forming process. This process enables the proprietary integrated JBL diamond 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 against 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 about 5 times that of Aluminum, Magnesium, Titanium, and Iron. This enables to maintain pistonic behavior up to 20,000Hz, eliminate diaphragm modal breakup and keep the upper frequency response very smooth with minimal distortion spikes. Compared to the 475Nd compression driver use in JBL’s original K2 S9500 system, this is about a 45% reduction in moving mass. With such a low mass, the moving assembly is able to respond even quicker to musical transients to further enhance detail and micro dynamic nuances.

JBL’s diamond pattern surround is utilized to maintain proper control and tuning of the second diaphragm resonance (the surround resonance mode). The proper control and placement of this surround resonance is critical for good high frequency shape, extension, and level.

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JBL DD66000 manual
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DD66000 specifications

The JBL DD66000 is a flagship model in the world of high-fidelity loudspeakers, designed to deliver an exceptional listening experience for audiophiles and music enthusiasts alike. With its rich heritage rooted in decades of acoustic engineering expertise, the DD66000 represents the pinnacle of JBL's commitment to superior audio performance.

One of the standout features of the DD66000 is its innovative three-way speaker configuration. This includes a 15-inch bass driver, a 4-inch midrange driver, and a high-frequency compression driver that produces crystal-clear treble. This arrangement allows for a wide frequency response, ensuring that every note, from the lowest lows to the highest highs, is reproduced with remarkable accuracy and detail.

The DD66000 boasts advanced technologies that enhance its performance. The Integrated Waveguide Technology ensures that sound is evenly distributed throughout the listening space, creating a spacious and immersive soundstage. This technology minimizes distortion and ensures that the sound maintains its clarity, even at high volumes. Additionally, the dual high-frequency compression drivers provide extended dynamic range, allowing the speaker to handle both quiet and loud passages seamlessly.

Another key characteristic of the JBL DD66000 is its robust build quality. The speaker is encased in an elegantly crafted cabinet that not only minimizes resonance but also adds to its aesthetic appeal. The sleek design incorporates high-quality materials, giving it a premium look that complements any audio setup.

The DD66000 is also versatile in its connectivity options. Designed to work seamlessly with various audio components, it features compatibility with both analog and digital sources. Audiophiles can enjoy their favorite music in high-resolution formats, ensuring that every detail is captured and enjoyed.

In summary, the JBL DD66000 is a masterful integration of advanced technology and superior craftsmanship. With its three-way configuration, cutting-edge sound dispersion technology, and solid build quality, it stands out as a premier choice for serious listeners. Whether used in a dedicated home theater or a high-end audio setup, the DD66000 promises to deliver an unrivaled listening experience, making it a worthy investment for those who demand the best in audio fidelity.
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