Krell Industries MASTER REFERENCE SUBWOOFER manual Totally Balanced Operation

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Totally Balanced Operation

Balanced circuits ensure optimum signal to noise ratios, signal preservation, and accuracy of delivery under every condition; however, the primary benefit of balanced circuitry is loudspeaker control. The Master Reference Subwoofer finesses the low frequency range with totally balanced operation from input to output, employing CAST or XLR inputs. In the output stage of each Master Reference Subwoofer, independent circuit paths amplify the positive and negative output signals to exercise absolute control over loudspeaker systems and force the loudspeakers to generate music and low frequency effects that are precisely representative of the original signal.

The Input Stage. The input stage of each subwoofer accepts signals in two ways: The CAST input accepts signals in the current domain, or the XLR input accepts signals in the voltage domain.

We recommend using CAST inputs, for the best subwoofer performance. When the CAST connection is used, the signal received by each amplifier remains in the current domain and is transmitted unchanged through the Krell Current Mode input and output stages, with absolutely no degradation.

Krell CAST and Krell Current Mode are more fully explained on pages 4-5.

When the XLR connection is used, a signal in the voltage domain is delivered to the input stage. Each amplifier converts this signal to the current domain. The signal in the current domain is then sent through the output stage of the subwoofer without alteration.

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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 Section ONE About Krell, pages OverviewSection Five Operation, pages 42 List of Illustrations Page Letter from Dan D’Agostino Krell Legacy About KrellPage Basics of Cast Traditional Audio System and Voltage Signal TransmissionNew Approach Current Audio Signal Transmission Revolutionary Krell Cast TechnologyCast and Krell Current Mode Combined Cast CablesBest Musical Performance Krell Active Motion Control Ensuring Maximum PerformanceInnovative Subwoofer Technology and Design Programmable Electronic CrossoverDrivers EnclosureKrell 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 Technology OperationPage Unpacking and Placement UnpackingTo Unpack the Master Reference Subwoofer To Remove the Subwoofer from the Packing Crate Master Reference Subwoofer Placement Options AC Power Guidelines PlacementFront Panel Description FeaturesFront Panel Display Power ButtonPower LED Stand-by LEDPower Master Reference Subwoofer Power Back Panel DescriptionBack Panel Remote Connections Inputs Outputs Operation Keys Battery Installation and Removal Remote Control DescriptionOperation Keys Remote Control FunctionsMenu Keys Filter Selection KeysFilter Parameter Keys Level Adjust KeysOverview Connections and ConfigurationsConnections and Configurations Step I. Choose the ConnectionsCast and Balanced Connections To Connect the Subwoofer Switching Between Cast and Balanced InputsFactory Defaults Default Menu FunctionsPage To Activate Cast Inputs Choosing Stereo, LFE, or Stereo/LFE When to Use LFE Only OptionSelect the Low-pass Filter Profile Step III. Configure the Programmable Electronic CrossoverAdjust the Low-pass Filter Parameters Select the Low-pass FilterAdjust the High-pass Filter Parameters Select the High-pass FilterSelect the High-pass Filter Profile Step IV. Match the High-pass and Low-pass Filter Levels Adjust the High-pass FilterAdjust the Low-pass Filter Step V. Select the Phase Step VI. Saving Your Settings to PresetsTo End Noise Generation Recalling Presets Steps for Subwoofer Operation follow OperationSystem Protection Subwoofer CareIf You Wish to Turn Your System Off Connecting Components Through Krell Link Optional ConnectionsKrell Link Krell Link Operation VDC 12 V Trigger RS-232Optional Configurations AC Mains MenuLED Menu Unit ID Menu Mute MenuExit Menu Warranty Page To contact the Krell Service Department Return Authorization Procedure

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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