Krell Industries FBI manual

FBI Fully Balanced Integrated Amplifier Instructions for Use Owner’ s Refer ence[...]

This pr oduct is manufactur ed in the United States of America. Kr ell ® is a r egister ed trademark of Kr ell Industries, Inc., and is r estricted for use by Kr ell Industries, Inc., its subsidiaries, and authorized agents. CAST™, Evolution CAST™, and Theater Thr oughput™ ar e trademarks of Kr ell Industries, Inc. All other trademarks and t[...]

Kr ell FBI 3 Contents Page INTRODUCTION 5 REVOLUTIONAR Y KRELL CAST TECHNOLOGY 6 DEFINITION OF TERMS 8 UNP ACKING 10 PLACEMENT 11 AC Power Guidelines FRONT P ANEL / REMOTE CONTROL DESCRIPTION 13 REMOTE CONTROL ONL Y 15 Battery Installation and Removal Remote Control Only Functions BACK P ANEL DESCRIPTION 18 CONNECTING THE FBI TO YOUR SYSTEM 20 Conn[...]

4 Krell FBI Illustrations FIGURE 1 The FBI Front Panel 12 FIGURE 2 The FBI Remote Control 12 FIGURE 3 The FBI Back Panel 17 Page[...]

Kr ell FBI 5 Intr oduction Thank you for your purchase of the Kr ell FBI Remote Contr ol Inte- grated Amplifier . This fully integrated amplifier and pr eamplifier has a fully balanced signal path from input to output and employs a wide bandwidth design with low negative feedback for sonic accu- racy throughout the fr equency spectrum. All cir cuit[...]

6 Krell FBI Current Audio Signal T ransmission, termed CAST , is a r evolutionary method of connecting analog audio components for unparalleled sonic performance. Innovative engineering combines the new Krell CAST cir- cuitry with existing Krell Curr ent Mode technology to create entir e CAST systems that repr oduce music with incredible range, ton[...]

maintains the integrity of the signal within the component and CAST preserves the transmitted signal between components. T ogether , CAST and Krell Curr ent Mode technologies unify separate Krell components into a single global circuit. Kr ell Curr ent Mode technology enjoys band- width increases up to an or der of magnitude greater than their volt[...]

Definition of T erms Following are the definitions of key terms used in your owner’ s refer ence manual. Theater Throughput Theater Throughput is a Kr ell configuration option that allows the signal from a surr ound pr eamp/processor to pass thr ough a Krell preamplifier or integrated amplifier input at unity gain and sus- pends operation of the [...]

D efinition of T erms, continued Off The component is off when the AC power cor d is unplugged fr om the wall receptacle. Stand-by Mode A low power consumption status that keeps the audio circuits at idle. When you plug the AC power cord into the wall r eceptacle, and turn on the rear panel breaker switch, the r ed stand-by LED illuminates. The com[...]

10 Kr ell FBI Unpacking T wo people are needed to r emove the Fully Balanced Integrated amplifier from its shipping box safely and easily . 1. Open the shipping carton and remove the top layer of foam. The carton contains : 1 Fully Balanced Integrated Amplifier 1 AC power cord 1 12 VDC (12 V trigger) cable 1 T -10 T orx wrench 1 FBI remote contr ol[...]

Kr ell FBI 11 Placement Before you install the FBI into your system, please r eview the fol- lowing guidelines to choose the proper location for the FBI. This will facilitate a clean, trouble-fr ee installation. The FBI does not requir e any type of special rack or cabinet for installation. For the dimensions of the FBI, see Specifications, on the [...]

12 Krell FBI Figure 1 The FBI Front Panel Figur e 2 The FBI Remote Control Power 1 Power Button or Key 2 Power Indicator 3 Stand-by LED 4 Infrared Sensor Analog Devices 5 C-1 Button, Key and LED 6 B-1 Button, Key and LED 7 S-1, S-2, S-3, and B-1, Buttons, Keys and LEDs 8 T ape Button or Key 9 T ape LED Mode Indicators 10 Mute Button or Key 11 Mute [...]

Fr ont Panel / Remote Contr ol Description S ee Figures 1 and 2 on page 12 Krell FBI 13 Power , analog input selections, and volume control accessed via the FBI front panel buttons or r emote contr ol keys are described below . The front panel display shows volume and balance levels, and Theater Throughput status. Most fr ont panel functions also a[...]

14 Krell FBI F ront Panel Description, continued 8 T ape Button or Key Use this button or key to playback pre-r ecor ded tapes and com- pare the output signal of an analog tape r ecor der to an audio source. See T ape Input and Output, on page 22. 9 T ape LED The red tape monitor LED illuminates when the tape monitor is activated. The LED does not [...]

Remote Contr ol Only See Figure 2 on page 12 Krell FBI 15 The remote contr ol uses 2 AAA-size 1.5 V olt batteries. Batteries are included with the shipment. T o install the batteries: 1. Remove the remote contr ol backplate, using the supplied T -10 T orx wrench. 2. Install the batteries, following the battery position diagram on the plastic batter[...]

R emote Control Functions, continued 16 Kr ell FBI The FBI remote contr ol accesses complete power amplifier and preamplifier functions. The volume adjustment function is unique to the FBI remote contr ol. 14 Bal (Balance) Keys Use these keys to shift the balance to the left or the right channel. Balance level is indicated in the front panel displa[...]

Figure 3 The FBI Back Panel Krell FBI 17 Amplifier Channel Outputs 15 Left and Right Loudspeaker Outputs Analog Inputs 16 Left and Right CAST Inputs 17 Left and Right Balanced Analog Inputs 18 Left and Right Single- ended Analog Inputs 19 Left and Right T ape Inputs Analog Outputs 20 Left and Right T ape Outputs 21 Left and Right Preamplifier Outpu[...]

Back Panel Description S ee Figure 3 on page 17 18 Krell FBI The FBI back panel provides connections for all inputs and out- puts, power on/off, and additional r emote connections. 15 Left and Right Loudspeaker Outputs T wo pairs of loudspeaker binding posts are available for each channel of amplification, facilitating a power -bi-wire connection t[...]

Kr ell FBI 19 22 RC-5 In The FBI is equipped with an RC-5 input that makes custom instal- lation easy and secure by accepting baseband RC-5 input com- mands from har dwir ed remote contr ollers. 23 12 VDC In / Out (12 V T rigger) The FBI has one output that sends, and one input that receives 12 VDC power on/off (12 V trigger) signals to and fr om o[...]

20 Krell FBI Krell r ecommends using balanced inter connect cables. Balanced interconnect cables not only can minimize sonic loss but ar e also immune to induced noise, especially with installations using long cables. Balanced connections have 6 dB more gain than single- ended connections. When level matching is critical, keep this gain value in mi[...]

Krell FBI 21 This section provides information about operating the Fully Balanced Integrated amplifier . The FBI provides basic input selec- tion and volume control operation fr om the fr ont panel. The remote contr ol includes additional pr eamplifier and volume func- tions as well as compact disc transport and amplifier controls. See Remote Contr[...]

22 Krell FBI 5. Set the volume to a comfortable listening level using the level knob on the front panel or the level keys on the r emote contr ol (12). 6. T o tur n the FBI off, pr ess the power button on the front panel or the power key on the remote contr ol (1). The r ed stand-by LED (3) illuminates, and the FBI is in the stand-by mode. It is no[...]

Krell FBI 23 T o simplify the integration of an audio/video surround sound pr oces- sor into your system, set any input on the FBI (C-1, B-1,S-1, S-2, or S-3) to operate as a unity gain stage. Krell calls this configuration Theater Throughput. When you configure a FBI input for Theater Throughput, the FBI volume and balance controls ar e transferr [...]

24 Krell FBI The FBI is equipped with a pair of single-ended preamplifier out- puts (19). These outputs enable the FBI to be used as a preampli- fier when it is connected to a separate amplifier . The amplifier channel outputs are always active, even when the FBI is being used only as a preamplifier . O ptional Configurations, continued Note Pr eam[...]

Krell FBI 25 AC grounding becomes critical when connecting high perform- ance audio components. When you mix and match audio compo- nents, each with its own ground potential, a low fr equency hum may occur in one or both loudspeakers. This sometimes occurs when introducing a new component into a system. If a low frequency hum emanates fr om the lou[...]

26 Krell FBI Q. Should I leave my FBI on at all times? A. Krell r ecommends leaving the amplifier in the stand-by mode, ready to play music. If you ar e not going to play music for a long time, you may disconnect the amplifier from AC power supply . Q. When I turn on the amplifier there is a loud hum through the loudspeakers. What should I do? A. W[...]

Kr ell FBI 27 Krell pr oducts have a limited warran ty . Amplifiers, preamplifiers, pr eamp/ pr oc ess or s, and receivers carry a limited warranty of five years for parts and labor on circuitry . Loudspeakers carry a limited warranty of five years for parts and labor . CD and DVD players carry a limited warranty of five years for parts and labor o[...]

28 Krell FBI Freight to the factory is your r esponsibility . Return freight within the United States (U.S.A.) is included in the warranty . If you have purchased your Krell pr oduct outside the U.S.A. and wish to have it serviced at the factory , all freight and associated char ges to the factory ar e your responsibility . Krell will pay r eturn f[...]

Krell FBI 29 Retur n Authorization Pr ocedur e If you believe there is a pr oblem with your component, please contact your dealer , distributor , or the Krell factory to discuss the problem before you return the component for repair . T o expedite service, you may wish to complete and e-mail the Service Request Form in the Service section of our we[...]

FREQUENCY RESPONSE 20 Hz–20 kHz +0.0 -0.05 dB SIGNAL-TO-NOISE RA TIO “A” weighted -108 dB TOT AL HARMONIC DISTOR TION (THD) 1 kHz <0.04% 20 kHz <0.3% GAIN 36.4 dB INPUT SENSITIVITY 0.741 V rms INPUT IMPEDANCE 210 kOhms POWER CONSUMPTION Stand-by 70 W Idle 185 W Max. 1,800 W INPUTS All with Theater Throughput 1 pair CAST via 4-pin bayone[...]