Krell Industries KAV400xi manuale d’uso

THE LEADER IN AUDIO ENGINEERING KA V– 400xi Remote Control Integrated Amplifier Instructions for Use Owner’ s Refer ence[...]

This product is manufactured in the United States of America. Krell ® is a registered trademark of Krell Industries, Inc., and is restricted for use by Krell Industries, Inc., its subsidiaries, and authorized agents. Krell Current Mode™ and Theater Throughput™ are trademarks of Krell Industries, Inc. All other trade- marks and tradenames are r[...]

Krell KA V– 400xi iii Contents Page INTRODUCTION 1 DEFINITION OF TERMS 2 UNP ACKING 4 PLACEMENT 5 AC Power Guidelines 5 Power Cord 5 FRONT P ANEL / REMOTE CONTROL DESCRIPTION 7 REMOTE CONTROL ONL Y 9 Battery Installation and Removal 9 Remote Control Only Functions 9 BACK P ANEL DESCRIPTION 12 CONNECTING THE KA V– 400xi T O YOUR SYSTEM 14 Connec[...]

iv Krell KA V– 400xi Illustrations FIGURE 1 The KA V– 400xi Front Panel 6 FIGURE 2 The KA V– 400xi Remote Control 6 FIGURE 3 The KA V– 400xi Back Panel 1 1 Page[...]

Krell KA V– 400xi 1 Intr oduction Thank you for your purchase of the Krell KA V– 400xi Remote Control Integrated Amplifier . This fully integrated amplifier and pre- amplifier has a fully balanced signal path from input to output and employs a wide bandwidth design with low negative feedback for sonic accuracy throughout the frequency spectrum.[...]

Definition of T erms OPERA TION Following are the definitions of key terms used in your owner ’s ref- erence manual. Theater Throughput Theater Throughput is a Krell configuration option that allows the signal from a surround preamp/processor to pass through a Krell preamplifier or integrated amplifier with no gain, for integrated vol- ume and ba[...]

Definition of T erms, continued Krell Current Mode A proprietary Krell circuit topology in which the audio gain stages of a component operate in the current rather than voltage domain. This unique technology provides the component with exceptional speed and a wide bandwidth. TECHNOLOGY Krell KA V– 400xi 3[...]

4 Krell KA V– 400xi Unpacking Follow these steps to safely unpack the KA V– 400xi: 1. Open the shipping box and remove the top layer of foam. The KA V– 400xi and the KA V– 400xi accessory kit containing the following items are visible: 1 AC power cord 1 12 VDC (12 V trigger) cable 2 spare loudspeaker fuses (AGC 8) 1 KA V–400xi remote cont[...]

Krell KA V– 400xi 5 Placement Before you install the KA V– 400xi into your system, review the fol- lowing guidelines to choose the location for the KA V– 400xi. This will facilitate a clean, trouble-free installation. The KA V– 400xi does not require any type of special rack or cabinet for installation. For the dimensions of the KA V– 400[...]

Figure 1 The KA V– 400xi Front Panel 2 7 1 4 11 6 9 10 8 3 5 KAV–400xi Figure 2 The KA V– 400xi Remote Control 1 12 Activates the KAV— 400xi remote to access amplifier commands 6 5 8 10 13 Note Remote control keys listed above function with the KA V– 400xi. Other keys on this remote control may activate other Krell components. Consult the[...]

Fr ont Panel / Remote Contr ol Description See Figures 1 and 2 on page 6 Krell KA V– 400xi 7 Power , analog input selections, and volume control accessed via the front panel of the KA V– 400xi are described in the illustration legend below . The front panel display shows volume and balance levels, and Theater Throughput status. Most front panel[...]

8 Krell KA V– 400xi Front Panel Description, continued 8 Mute Button or Key Use this button to interrupt the signal of the input you have select- ed. T o unmute, press the mute button again. 9 Mute LED The red mute LED illuminates when you press the mute button on the front panel or the mute key on the remote control (8). 10 Level Knob / Level Ke[...]

Remote Contr ol Only See Figure 2 on page 6 Krell KA V– 400xi 9 The KA V– 400xi remote control uses one CR2025 lithium battery , which is included with the shipment. To open the battery compartment on the back of the remote control: 1. Place the remote face down on the table. 2. Use your thumbnail or a small jeweler ’s or eyeglass screw- driv[...]

Remote Control Functions, continued 10 Krell KA V– 400xi 13 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 display (1 1). T o display balance, push any key on the remote. The front panel display indicates: - C - when the system is balanced. If the system is no[...]

Figure 3 The KA V– 400xi Back Panel 50/60 Hz 21 20 24 14 15 16 17 18 19 14 24 23 22 KAV– 400xi Integrated Amplifier MADE IN USA FUSE AGC 8 LEFT OUTPUT IN IN RC–5 12VDC OUT OUTPUTS TAPE PREAMP LEFT TAPE S – 3 S – 2 S – 1 INPUTS B– 1 LEFT B–1 RIGHT RIGHT OUTPUT RIGHT FUSE AGC 8 NO USER SERVICEABLE PARTS INSIDE Krell KA V– 400xi 11 A[...]

Back Panel Description See Figure 3 on page 11 12 Krell KA V– 400xi The KA V– 400xi back panel provides connections for all inputs and outputs, power on/off, and additional remote connections. 14 Left and Right Loudspeaker Outputs The KA V– 400xi is equipped with standard binding posts for each amplifier channel. These connectors accept bare [...]

Back Panel Description, continued Krell KA V– 400xi 13 In. The input receives 12 VDC (12 V trigger) power on/of f signals from other Krell components and other devices that incorporate a 12 V trigger . The 12 VDC output current is limited to 30 ma. Consult the owner ’s reference of the components used in a custom installation to take full advan[...]

14 Krell KA V– 400xi Krell recommends using balanced interconnect cables. Balanced interconnect cables not only can minimize sonic loss but are 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 valu[...]

Krell KA V– 400xi 15 This section provides information about operating the KA V– 400xi. The KA V– 400xi provides basic input selection and volume control operation from the front panel. The remote control includes addi- tional preamplifier and volume functions as well as compact disc transport and amplifier controls. See Remote Control Only ,[...]

16 Krell KA V– 400xi 3. Start playing the source. 4. Set the volume to a comfortable listening level using the level knob on the front panel or the level keys on the remote control (10). 5. To turn the amplifier off, press the power button on the front panel or the power key on the remote control (1). The red stand-by LED (3) illuminates. It is n[...]

Krell KA V– 400xi 17 To simplify the integration of an audio/video surround sound processor into your system, set any input on the KA V– 400xi (S-1, S-2, S-3, or B-1) to operate as a unity gain stage. Krell calls this configuration Theater Throughput. When you configure a KA V– 400xi input for Theater Throughput, the KA V– 400xi volume and [...]

18 Krell KA V– 400xi The KA V– 400xi is equipped with a pair of single-ended preamplifi- er outputs (19). These outputs enable the KA V– 400xi to be used as a preamplifier when it is connected to a separate amplifier . The amplifier channel outputs are always active, even when the KA V– 400xi is being used only as a preamplifier . Optional [...]

Krell KA V– 400xi 19 AC grounding becomes critical when connecting high performance audio components. When you mix and match audio components, each with its own ground potential, a low frequency 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 from the[...]

20 Krell KA V– 400xi Q. Should I leave my KA V– 400xi on at all times? A. Krell recommends leaving the amplifier in the stand-by mode, ready to play music. If you are 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[...]

Krell KA V– 400xi 21 This Krell product has a limited warranty of five years for parts and labor on circuitry . Should this product fail to perform at any time during the warranty , Krell will repair it at no cost to the owner , except as set forth in this warranty . The warranty does not apply to damage caused by acts of God or nature. The warra[...]

22 Krell KA V– 400xi Retur n Authorization Pr ocedur e If you believe there is a problem with your component, please con- tact 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 sectio[...]

FREQUENCY RESPONSE 20 Hz–20 kHz +0 dB, -0.07 dB SIGNAL-TO-NOISE RA TIO “A” weighted 99 dB TOT AL HARMONIC DISTORTION (THD) 20 Hz–20 kHz 1 kHz <0.04% 20 kHz <0.25% GAIN 35.8 dB INPUT SENSITIVITY 0.644 V rms INPUT IMPEDANCE 47 kOhms OUTPUT IMPEDANCE 0.17 Ohms POWER CONSUMPTION Idle 20 W Max. 1,800 W TRANSFORMER 750 V A INPUTS All with T[...]