Krell Industries MASTER REFERENCE SUBWOOFER manual Operation, Technology

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(SECTION ONE: About Krell continued)

(Definition of Terms continued)

Krell CAST Current Audio Signal Transmission (CAST) is a proprietary Krell circuit technology for connecting analog components, in which the audio waveform is transmitted between components in the current rather than the voltage domain. The speed and band- width that CAST provides yield astounding levels of accuracy and realism. Krell components connected via CAST perform as if they are all part of a single circuit.

Low Frequency Effect LFE enriches the low end of a musical score and enhances (LFE) Input nearly subsonic content, such as explosions or other special

effects. It is part of the Dolby 5.1 specification, with a bandwidth of 5 to 120 Hz.

Single-endedA two-wire input or output circuit in which the ground connection is made last and broken first. Use care when using single-ended connections. Turn the system off prior to making or breaking single-ended connections. Single-ended connections are not recommended for configurations requiring long cable runs.

Operation

Off When the power switch on the rear panel is placed in the down position and the red stand-by LED turns off, the component is off.

Operational Mode When the power button on the front panel is pressed and the blue power LED illuminates, the component is in the opera- tional mode and ready to play music.

Stand-by Mode A low power consumption status that keeps the audio and reg- ulator circuits at idle. Krell recommends leaving the component in the stand-by mode when it is not playing music.

Krell Active Motion Control

Technology

A proprietary Krell circuit designed to continuously compare the position of a loudspeaker to the analog waveform at the amplifier input. Active Motion Control provides an extra measure of loudspeaker control without the transient distortion associated with simple servo designs.

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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 CastCast and Krell Current Mode Combined Cast CablesBest Musical Performance Programmable Electronic Crossover Ensuring Maximum PerformanceInnovative Subwoofer Technology and Design Krell Active Motion ControlEnclosure DriversKrell Cast and Krell Current Mode Krell Core TechnologiesKrell Proprietary Output Devices Totally Balanced Operation Section ONE About Krell Totally Balanced Operation Configurations Definition of TermsInputs and Outputs Operation TechnologyPage Unpacking and Placement UnpackingTo Unpack the Master Reference Subwoofer 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 Power Back Panel DescriptionBack Panel Remote Connections 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 OverviewConnections and Configurations Step I. Choose the ConnectionsCast and Balanced 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 ProfileAdjust the High-pass Filter Parameters Select the High-pass FilterSelect the High-pass Filter Profile Adjust the High-pass Filter Step IV. Match the High-pass and Low-pass Filter LevelsAdjust the Low-pass Filter Step V. Select the Phase Step VI. Saving Your Settings to PresetsTo End Noise Generation Recalling Presets Operation Steps for Subwoofer Operation followSystem Protection Subwoofer CareIf You Wish to Turn Your System Off Connecting Components Through Krell Link Optional ConnectionsKrell Link Krell Link Operation RS-232 VDC 12 V TriggerOptional Configurations AC Mains MenuLED 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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