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Krell Industries MASTER REFERENCE SUBWOOFER A. Select the Low-passFilter, Low-passFilter Slope

Models: MASTER REFERENCE SUBWOOFER

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A. Select the Low-pass Filter

(SECTION FOUR: Connections and Configurations continued)

Step III. Configure the Programmable Electronic Crossover

This section explains how to configure the subwoofer’s two sections, the low-pass (sub) and high-pass filters, by selecting the appropriate filter profile (Butterworth, Bessel, or Linkwitz-Riley), and adjusting the slope, frequency, and level parameters for each filter profile.

Configuring the programmable electronic crossover is required for stereo and stereo/LFE operation. Krell recommends performing the configuration in the order indicated below.

A. Select the Low-pass Filter

Press the section sub key (35) on the remote control to access the low-pass filter parameters. The front panel display (4) shows SUB ADJ.

B. Select the Low-pass Filter Profile

Press the type key (39) to access the filter profile. Press the adjust keys (43) to select the profile you want. The Master Reference Subwoofer has three low-pass filter profiles available: Bessel, Butterworth and Linkwitz-Riley.

C. Adjust the Low-pass Filter Parameters

IMPORTANT

Adjust the parameters in this order: slope, frequency, and level.

1.Low-pass Filter Slope

a.Press the slope key (40).

b.Use the adjust keys (43) to adjust the slope (in 6 dB increments). The low-pass filter has a range from 6 dB to 48 dB.

2.Low-pass Filter Frequency

a.Press the frequency key (41).

b.Use the adjust keys (43) to select the desired frequency setting (in 10 Hz increments). The frequency selectable ranges from 30 to 100 Hz.

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Contents

M R S M A S T E R R E F E R E N C E S U B W O O F E RO W N E R ’ S R E F E R E N C E Master Reference Subwoofer Owner’s Reference WARNINGSOverview SECTION TWO Unpacking and Placement, pagesSECTION THREE Features, pages SECTION ONE About Krell, pagesRETURN AUTHORIZATION PROCEDURE, page SECTION SEVEN Optional Configurations, pagesWARRANTY, pages SECTION FIVE Operation, pagesFigure 2, page List of IllustrationsFigure 1, page Figure 3, pagePage Sincerely Daniel D’Agostino A Letter from Dan D’AgostinoDear Audio Enthusiast Chief Executive OfficerSECTION ONE About KrellThe Krell Legacy 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 A New Approach Current Audio Signal Transmission Revolutionary Krell CAST TechnologyThe Basics of CAST CAST and Krell Current Mode Combined CAST CablesThe Best Musical Performance Programmable Electronic Crossover Ensuring Maximum PerformanceInnovative Subwoofer Technology and Design Krell Active Motion ControlEnclosure DriversKrell Core Technologies Krell CAST and Krell Current ModeKrell Proprietary Output Devices Totally Balanced Operation SECTION ONE About Krell continued Totally Balanced Operation continuedConfigurations Definition of TermsInputs and Outputs Operation TechnologyKrell 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 To Unpack the Master Reference Subwoofer Unpacking and PlacementUnpacking SECTION TWOTo Remove the Subwoofer from the Packing Crate 4 people needed1 person needed Scenario 2 Home Theater, Rear Projection 3Master Reference SubwooferScenario 1 Stereo Scenario 3 Home Theater, Front ProjectionPlacement AC Power GuidelinesSECTION THREE FeaturesFront Panel Description See Figure3 Stand-byLED 1 Power Button2 Power LED 4 Front Panel DisplayInputs PowerBack Panel Remote Connections OutputsMaster Reference Subwoofer 7 AC Input Specification Power6 Power Switch 8 IEC Power Connector13 RS-232 Inputs12 RC-5In 14 Left and Right CAST Inputs20 Left and Right CAST High-passOutputs Outputs19 LFE Single-endedInput 21 Left and Right Balanced High-passOutputsOperation Keys PowerLevel Adjust Keys Filter Selection KeysRemote Control Description Battery Installation and Removal28 Phase Key Remote Control Functions26 Power Key 29 Preset Keys32 Unit Keys Filter Selection KeysMenu Keys 33 All Key43 Adjust Up and Down Keys Level Adjust Keysquency setting Filter Parameter KeysStep VI. Saving Your Settings to Presets Connections and ConfigurationsStep V. Select the Phase OverviewConnections and Configurations Step I. Choose the ConnectionsCAST and Balanced Connections Default Menu Functions Switching Between CAST and Balanced InputsFactory Defaults 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/LFEB. Select the Low-passFilter Profile C. Adjust the Low-passFilter ParametersA. Select the Low-passFilter 1.Low-passFilter SlopeE. Select the High-passFilter Profile F. Adjust the High-passFilter ParametersD. Select the High-passFilter 3.Low-passFilter LevelA. Adjust the High-passFilter B. Adjust the Low-passFilter Step V. Select the Phase Step VI. Saving Your Settings to PresetsC. To End Noise Generation 1.Press the preset key Recalling PresetsTo save a setting configuration to a preset 1.Press the save keyOperation The Steps for Subwoofer Operation followSECTION FIVE System Protection Subwoofer CareIf You Wish to Turn Your System Off Krell Link Connecting Components Through Krell LinkOptional Connections SECTION SIXKrell Link Operation RS-232 12 VDC 12 V TriggerSECTION SIX Optional Connections continued LED Menu Optional ConfigurationsAC Mains Menu SECTION SEVENMute Menu Unit ID MenuExit Menu This option allows you to exit the menu mode2.Press the enter key 38. You exit the menu mode Warranty Page Return Authorization Procedure To contact the Krell Service Departmentserve you better