Krell Industries MASTER REFERENCE SUBWOOFER manual Krell Core Technologies

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(SECTION ONE: About Krell continued)

(Drivers continued)

Two 80 oz. strontium ferrite magnets are affixed to the custom-made, cast magnesium speaker frame. The magnet assembly has been contoured to produce a powerful, focused, magnetic field. A robust, doped (reinforced) paper cone, chosen for its high strength and low weight, is affixed at one end to the speaker frame via a special rubber surround. This surround has a unique geometry that resists cavitating (turning inside out) under high pressures. At the other end of the cone, Krell utilizes a dual-spider arrangement in order to maintain the superi- or alignment of the concentric mechanical assembly under all performance con- ditions. An extra-long voice coil controls the drivers even at maximum excursion.

Krell Core Technologies

Krell CAST and Krell Current Mode

These circuit topologies combine to transmit audio waveforms between compo- nents in the current rather than the voltage domain. Krell components using Krell Current Mode circuitry and CAST technology perform as if they are part of a single circuit. The resulting speed and bandwidth produce outstanding accuracy and realism in music reproduction.

Krell Proprietary Output Devices

Loudspeaker control is paramount in any audio system. Control is even more critical in subwoofers, in which the audio band is limited to the extreme low frequencies. Krell amplifiers are known for the control they exert on even the most complex loudspeaker loads. Part of this capacity is a result of the proprietary output devices used in all Krell amplifiers. These devices, manufactured for Krell by Motorola, allow for high gain and low output impedance. These circuits enable the amplifier to deliver enormous amounts of current with relative ease and with less distortion.

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Contents S T E R R E F E R E N C E S U B W O O F E R Master Reference Subwoofer Owner’s Reference Overview Section ONE About Krell, pagesSection Five Operation, pages 42 List of Illustrations Page Letter from Dan D’Agostino About Krell Krell LegacyPage Revolutionary Krell Cast Technology Traditional Audio System and Voltage Signal TransmissionNew Approach Current Audio Signal Transmission Basics of CastBest Musical Performance Cast and Krell Current Mode CombinedCast Cables Programmable Electronic Crossover Ensuring Maximum PerformanceInnovative Subwoofer Technology and Design Krell Active Motion ControlEnclosure DriversKrell Proprietary Output Devices Krell Cast and Krell Current ModeKrell Core Technologies Totally Balanced Operation Section ONE About Krell Totally Balanced Operation Inputs and Outputs ConfigurationsDefinition of Terms Operation TechnologyPage To Unpack the Master Reference Subwoofer Unpacking and PlacementUnpacking To Remove the Subwoofer from the Packing Crate Master Reference Subwoofer Placement Options Placement AC Power GuidelinesFeatures Front Panel DescriptionStand-by LED Power ButtonPower LED Front Panel DisplayPower Master Reference Subwoofer Back Panel Remote Connections PowerBack Panel Description Inputs Outputs Operation Keys Remote Control Description Battery Installation and RemovalRemote Control Functions Operation KeysFilter Selection Keys Menu KeysLevel Adjust Keys Filter Parameter KeysConnections and Configurations OverviewCast and Balanced Connections Connections and ConfigurationsStep I. Choose the Connections Default Menu Functions Switching Between Cast and Balanced InputsFactory Defaults To Connect the SubwooferPage To Activate Cast Inputs When to Use LFE Only Option Choosing Stereo, LFE, or Stereo/LFESelect the Low-pass Filter Step III. Configure the Programmable Electronic CrossoverAdjust the Low-pass Filter Parameters Select the Low-pass Filter ProfileSelect the High-pass Filter Profile Adjust the High-pass Filter ParametersSelect the High-pass Filter Adjust the High-pass Filter Step IV. Match the High-pass and Low-pass Filter LevelsAdjust the Low-pass Filter To End Noise Generation Step V. Select the PhaseStep VI. Saving Your Settings to Presets Recalling Presets Operation Steps for Subwoofer Operation followIf You Wish to Turn Your System Off System ProtectionSubwoofer Care Krell Link Connecting Components Through Krell LinkOptional Connections Krell Link Operation RS-232 VDC 12 V TriggerLED Menu Optional ConfigurationsAC Mains Menu Mute Menu Unit ID MenuExit Menu Warranty Page Return Authorization Procedure To contact the Krell Service Department

MASTER REFERENCE SUBWOOFER specifications

Krell Industries has long been synonymous with high-end audio equipment, and their Master Reference Subwoofer is a testament to this legacy of excellence. Designed to deliver an unparalleled listening experience, the Master Reference Subwoofer is engineered to provide deep, powerful bass without compromising clarity or detail.

One of the standout features of the Master Reference Subwoofer is its robust construction. The cabinet is made from high-density materials that minimize resonances and vibrations, ensuring that the purity of the audio signal is maintained. This attention to detail is crucial, as unwanted vibrations can color the sound and detract from the listening experience. The design also includes internal bracing that further enhances stiffness, resulting in a more controlled bass response.

At the heart of the Master Reference Subwoofer is a custom-engineered driver, designed to handle the demands of high-powered audio. With a large diaphragm and a powerful motor system, this driver can reproduce lower frequencies with remarkable accuracy. The subwoofer utilizes a sophisticated suspension system that allows for greater travel while maintaining linearity, resulting in an impressive dynamic range. This means that whether you're listening to the subtle nuances of a classical piece or the thunderous explosions of an action movie, the Master Reference Subwoofer can handle it all with finesse.

Krell's proprietary technologies further enhance the performance of the Master Reference Subwoofer. The subwoofer features advanced digital signal processing (DSP) that allows for precise tuning and customization of the audio output. This ensures that the subwoofer can adapt to different room acoustics and individual preferences, resulting in optimal sound quality in any environment. Moreover, the Room EQ feature automatically analyzes the listening space and adjusts the output accordingly, providing an incredible level of personalization.

Connectivity options on the Master Reference Subwoofer are diverse and versatile, including XLR and RCA inputs, making it compatible with a wide range of audio systems. The intuitive interface allows users to easily navigate through various settings, making setup and adjustment a breeze.

In summary, the Krell Industries Master Reference Subwoofer showcases the company's commitment to audio excellence through its unmatched construction, innovative driver technology, and advanced digital processing capabilities. For audiophiles seeking a subwoofer that delivers not just deep bass, but also accuracy and control, the Master Reference Subwoofer stands out as a premier choice, elevating any listening experience to new heights.
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