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Krell Industries MASTER REFERENCE SUBWOOFER manual SECTION ONE About Krell continued

Models: MASTER REFERENCE SUBWOOFER

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(SECTION ONE: About Krell continued)

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The Output Stage. In the output stage of a conventional amplifier, loudspeaker control is accomplished by driving the positive speaker terminal only. Each Master Reference Subwoofer uses two Krell Current Mode circuit paths, one to drive the positive and one to drive the negative terminals of the loudspeakers. These signals work together to drive the loudspeakers in a precise “push-pull” dialogue that preserves all the characteristics of the recording.

The Master Reference Subwoofer sets a new standard for ultimate subwoofer power and performance. Its ability to reproduce the impact and tonal quality of low frequency sound is unparalleled, as is the ease with which it can match any system or speaker configuration. The Master Reference Subwoofer represents the culmination of the latest research and development from Krell Industries, Inc. and represents the next exciting innovation in the long line of exceptional audio components from The Leader in Audio Engineering—Krell.

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Krell Industries MASTER REFERENCE SUBWOOFER manual SECTION ONE About Krell continued, Totally Balanced Operation continued

Contents

M A S T E R R E F E R E N C E S U B W O O F E R M R SO W N E R ’ S R E F E R E N C E Master Reference Subwoofer Owner’s Reference WARNINGSSECTION TWO Unpacking and Placement, pages SECTION THREE Features, pagesOverview SECTION ONE About Krell, pagesSECTION SEVEN Optional Configurations, pages WARRANTY, pagesRETURN AUTHORIZATION PROCEDURE, page SECTION FIVE Operation, pagesList of Illustrations Figure 1, pageFigure 2, page Figure 3, pagePage A Letter from Dan D’Agostino Dear Audio EnthusiastSincerely Daniel D’Agostino Chief Executive OfficerAbout Krell The Krell LegacySECTION ONE for workmanship, style, and performance.”From the first Krell product - the KSA-100- to the present, Dan D’Agostino has continually “pushed the envelope” of performance in his search for greater amplifier power and now, subwoofer power. His exploration of technologies, driven by his never-endingquest to elevate the standard of excellence, has resulted in break- through audio designs. Over the years, the Krell line of power amplifiers, including benchmark products such as the KRS -100,KRS -200,and the Audio Standard models, has established a legacy of unparalleled sonic performance. The Master Reference Subwoofer brings that level of performance to the low frequency range Revolutionary Krell CAST Technology A New Approach Current Audio Signal TransmissionThe Basics of CAST CAST Cables CAST and Krell Current Mode CombinedThe Best Musical Performance Ensuring Maximum Performance Innovative Subwoofer Technology and DesignProgrammable Electronic Crossover Krell Active Motion ControlEnclosure DriversKrell CAST and Krell Current Mode Krell Core TechnologiesKrell Proprietary Output Devices Totally Balanced Operation SECTION ONE About Krell continued Totally Balanced Operation continuedDefinition of Terms ConfigurationsInputs and Outputs Technology OperationKrell Active Motion Control Krell Current Mode A proprietary Krell circuit topology in which the audio gain stages operate in the current domain. Krell Current Mode provides speed and bandwidth performance that is not possible with less sophisticated voltage designs Unpacking and Placement UnpackingTo Unpack the Master Reference Subwoofer SECTION TWO4 people needed To Remove the Subwoofer from the Packing Crate1 person needed 3Master Reference Subwoofer Scenario 1 StereoScenario 2 Home Theater, Rear Projection Scenario 3 Home Theater, Front ProjectionPlacement AC Power GuidelinesFeatures Front Panel DescriptionSECTION THREE See Figure1 Power Button 2 Power LED3 Stand-byLED 4 Front Panel DisplayPower Back Panel Remote ConnectionsInputs OutputsMaster Reference Subwoofer Power 6 Power Switch7 AC Input Specification 8 IEC Power ConnectorInputs 12 RC-5In13 RS-232 14 Left and Right CAST InputsOutputs 19 LFE Single-endedInput20 Left and Right CAST High-passOutputs 21 Left and Right Balanced High-passOutputsPower Level Adjust KeysOperation Keys Filter Selection KeysRemote Control Description Battery Installation and RemovalRemote Control Functions 26 Power Key28 Phase Key 29 Preset KeysFilter Selection Keys Menu Keys32 Unit Keys 33 All KeyLevel Adjust Keys quency setting43 Adjust Up and Down Keys Filter Parameter KeysConnections and Configurations Step V. Select the PhaseStep VI. Saving Your Settings to Presets OverviewStep I. Choose the Connections Connections and ConfigurationsCAST and Balanced Connections Switching Between CAST and Balanced Inputs Factory DefaultsDefault Menu Functions A. To Connect the Subwoofer18or the single-endedLFE input 19 on the subwoofer back panel to the subwoofer output of your processor B. To Activate CAST Inputs D. When to Use LFE Only Option C. Choosing Stereo, LFE, or Stereo/LFEC. Adjust the Low-passFilter Parameters A. Select the Low-passFilterB. Select the Low-passFilter Profile 1.Low-passFilter SlopeF. Adjust the High-passFilter Parameters D. Select the High-passFilterE. Select the High-passFilter Profile 3.Low-passFilter LevelA. Adjust the High-passFilter B. Adjust the Low-passFilter Step VI. Saving Your Settings to Presets Step V. Select the PhaseC. To End Noise Generation Recalling Presets To save a setting configuration to a preset1.Press the preset key 1.Press the save keyThe Steps for Subwoofer Operation follow OperationSECTION FIVE Subwoofer Care System ProtectionIf You Wish to Turn Your System Off Connecting Components Through Krell Link Optional ConnectionsKrell Link SECTION SIXKrell Link Operation 12 VDC 12 V Trigger RS-232SECTION SIX Optional Connections continued Optional Configurations AC Mains MenuLED Menu SECTION SEVENMute Menu Unit ID MenuThis option allows you to exit the menu mode Exit Menu2.Press the enter key 38. You exit the menu mode Warranty Page To contact the Krell Service Department Return Authorization Procedureserve you better