Krell Industries S-1500 Manual de usuario

INSTRUCTIONS FOR USE

S–1500 MULTI-CHANNEL

AMPLIFIER

Owner’s Reference

S–1500

Multi-channel Amplifier

Instructions for Use

v07.0

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™ is a trademark of Krell Industries, Inc. All other trademarks and tradenames are reg-

istered to their respective companies.

CONTACT

INFORMATION

This product complies with the

EMC directive (89/336/EEC)

and the low-voltage directive

(73/23/EEC).

Krell Industries, Inc.

45 Connair Road

Orange, CT 06477-3650 USA

TEL 203-298-4000

FAX 203-891-2028

E-MAIL krell@krellonline.com

WEBSITE http://www.krellonline.com

IMPORTANT SAFETY INSTRUCTIONS

1. Read Instructions.

2. Keep these Instructions.

3. Heed all Warnings.

4. Follow all Instructions.

5. Do not use this apparatus near water.

6. Clean only with a drycloth.

7. Do not install near any heat sources such as radiators, heat registers,

stoves, or other apparatus (including amplifiers) that produce heat.

8. Unplug this apparatus during lightning storms or when unused for long

periods of time.

9. Refer all servicing to qualified service personnel. Servicing is required

when the apparatus has been damaged in any way, such as a power-

supply cord or plug is damaged, liquid has been spilled or objects have

fallen into the apparatus, the apparatus has been exposed to rain or

moisture, does not operate normally, or has been dropped.

10. The S–1500 amplifier must be placed on a firm, level surface where it is

not exposed to dripping or splashing.

11. The ventilation grids on the top and bottom of the S–1500 amplifier must

be unobstructed at all times during operation. Do not place flammable

material above or beneath the S–1500 amplifier.

12. Before making connections to the S –1500 amplifier, ensure that the power

is off and other components are in mute or stand-by mode. Make sure all

cable terminations are of the highest quality, free from frayed ends, short

circuits, or cold solder joints.

13. THERE ARE NO USER SERVICEABLE PARTS INSIDE AN S–1500

AMPLIFIER.

Please contact Krell if you have questions not addressed in this guide.

Contents

Krell S–1500 Multi-channel Amplifier 3

INTRODUCTION 5

DEFINITION OF TERMS 6

UNPACKING 7

PLACEMENT 8

AC Power Guidelines

FRONT PANEL DESCRIPTION 10

BACK PANEL DESCRIPTION 11

CONNECTING THE S–1500 AMPLIFIER TO YOUR SYSTEM 13

Input and Output Connections

OPERATING THE S–1500 AMPLIFIER 15

On/Off and Operation

TROUBLESHOOTING SYSTEM NOISE 16

QUESTIONS AND ANSWERS 17

WARRANTY 18

RETURN AUTHORIZATION PROCEDURE 20

SPECIFICATIONS 21

Page

4Krell S–1500 Multi-channel Amplifier

FIGURE 1 The S–1500 Multi-channel Amplifier

Front Panel 9

FIGURE 2 The S–1500 Multi-channel Amplifier

Back Panel 9

Illustrations

Page

Krell S–1500 Multi-channel Amplifier 5

Thank you for your purchase of a Krell S –1500 Multi-channel

Amplifier.

The S–1500 amplifier is a flexible design that delivers five, six,

or seven channels of amplification. All three configurations include

input and output connections for all seven channels. The amplifiers

differ only by how many channels are housed within the amplifier.

The S–1500 / 5 includes five amplifier channels, the S–1500 / 6

includes six amplifier channels, and the S–1500 / 7 includes seven

amplifier channels. The S–1500 / 5 and S–1500 / 6 may be

upgraded with additional channels, up to seven.

Please contact your authorized Krell dealer or distributor for infor-

mation on upgrading your amplifier to six or seven channels.

The S–1500 amplifier has balanced and single-ended inputs for

compatibility with other components. The amplifiers can be oper-

ated using the 12 VDC power on/off (12 V trigger) signals from

other components. The S–1500 amplifier is versatile, fitting a vari-

ety of installations including rack-mounted and inside cabinetry.

This reference manual contains important information on place-

ment, installation, and operation of the S–1500 amplifier. Please

read this information carefully. A thorough understanding of these

details helps ensure satisfactory operation and long life for your

S–1500 amplifier and related system components.

Please contact your authorized Krell dealer, distributor, or Krell, if

you have any questions about the S–1500 not addressed in this

owner’s reference.

Introduction

6Krell S–1500 Multi-channel Amplifier

Following are the definitions of key terms used in this owner’s ref-

erence.

Balanced

Asymmetrical input or output circuit that has equal impedance

from both input terminals to a common ground reference point.

The industry standard for professional and sound recording instal-

lations, balanced connections have 6 dB more gain than single-

ended connections, and allow the use of long interconnect cables.

Balanced connections are less susceptible than single-ended con-

nections to induced noise from the system or the environment.

Single-ended

Atwo-wire input or output circuit. Use care when using single-

ended connections as the ground connection is made last and

broken first. Turn the system off prior to making or breaking single-

ended connections. Single-ended connections arenot recom-

mended for connections requiring long cable runs.

Off

When the AC power cordis not plugged into the wall, the front

panel LED is not illuminated and the component is off.

Stand-by Mode

When the AC power cord is plugged into the wall, the front panel

stand-by and power LED (2) illuminates red, indicating that the

component is in the stand-by mode. This low power consumption

status keeps the audio and circuits at idle. Krell recommends leav-

ing the component in the stand-by mode when it is not playing

music.

Operational Mode

From the stand-by mode, when the power button on the front

panel is pressed and the front panel stand-by and power LED (2)

illuminates blue, the component is in the operational mode and

ready to play music.

Krell Current Mode

Aproprietary Krell circuit topology in which the audio gain stages

of a component operate in the current domain, rather than the

voltage domain. This unique technology provides the component

with exceptional speed and a wide bandwidth.

Definition of Terms

INPUT AND OUTPUT

CONNECTIONS

OPERATION

TECHNOLOGY

Unpacking

Krell S–1500 Multi-channel Amplifier 7

1. Open the shipping box, and remove the top layer of foam. The

following items are visible:

1 S–1500 Multi-channel Amplifier

1 Accessory Kit containing:

1AC power cord

1 12 VDC output (12 V trigger) cable

1 12A 1/4-inch slow-blow fuse for 100 –120 VAC

1 6A 1/4-inch slow-blow fuse for 220 –240 VAC

1Packet containing the owner’s reference manual and the

warranty registration card.

Two people are needed to remove the amplifier from the shipping

box.

2. Grasp the underside of the amplifier and lift it straight out of

the shipping box.

3. Place the amplifier in a safe location and remove the protective

plastic wrapping.

If any of these items are not included in the shipping box, please contact

your authorized Krell dealer, distributor, or Krell for assistance.

Save all packing materials. If you ship your amplifier in the future, repack

the unit in its original packaging to prevent transit damage. See Return

Authorization Procedure, on page 20, for more information.

IMPORTANT

NotesNotes

8Krell S–1500 Multi-channel Amplifier

Before you integrate the S–1500 Multi-channel Amplifier into your

system, review the following guidelines to choose the location for

the component. This will facilitate a clean, trouble-free installation.

The S–1500 amplifier requires at least two inches (5 cm) of clear-

ance on each side, and at least two inches (5 cm) of clearance

above and below the component to provide adequate ventilation.

The S–1500 amplifier does not require any type of special rack or

cabinet for installation. For the dimensions of your amplifier see

Specifications, on page 21.

Place the amplifier as close to the loudspeakers as possible and

keep the loudspeaker cable length to a minimum. Loudspeaker

cable adds impedance to the load that the amplifier must drive,

regardless of the cable’s gauge. Krell amplifiers drive the lowest

impedances with ease, but long loudspeaker cables reduce the

maximum power that is delivered to the loudspeakers.

Krell recommends operating the S –1500 amplifier from a dedicat-

ed 15-amp AC power line. Please contact your Krell dealer,distrib-

utor,or Krell beforeusing any devices designed to alter or stabilize

the AC power for the S–1500.

Placement

AC Power

Guidelines

POWER

Figure 1 The S–1500 Multi-channel Amplifier Front Panel

Power

1Power Button

2Stand-by and Power LED

Krell S–1500 Multi-channel Amplifier 9

INPUT 1 INPUT 2 INPUT 3 INPUT 4 INPUT 5 INPUT 6 INPUT 7

OUTPUT 1 OUTPUT 2 OUTPUT 3OUTPUT 4 OUTPUT 5 OUTPUT 6 OUTPUT 7

NO USER SERVICEABLE PARTS INSIDE

KRELL INDUSTRIES, INC.

45 CONNAIR ROAD

ORANGE, CT 06477-3650

USA

12VDC

OUT IN

30mA

MAX.

4 6 7

589

50/60 Hz

MADE IN USA

Balanced Inputs

3Inputs 1-7

Single-Ended Inputs

4 Inputs 1-7

Amplifier Channel Outputs

5Outputs 1-7

Remote Connections

6 12 VDC Remote Power Out

7 12 VDC Remote Power In

Power

8 IEC Connector

9 Fuseholder

Figure 2 The S–1500 Multi-channel Amplifier Back Panel

The S–1500 Multi-channel Amplifier front panel provides power on

and indicates operating status.

1Power Button

Use this button to switch the S–1500 amplifier power between the

stand-by and the operational modes and also to switch the 12 VDC

output (12 V trigger) on and off.

2Stand-by and Power LED

When the AC power cord is plugged into the wall, the LED illumi-

nates in red, indicating that the component is in the stand-by

mode.

When the power button is pressed, the LED illuminates in blue,

indicating that the component is in the operational mode.

The LED flashes red when the protection circuit is activated.

If the LED flashes red when the amplifier is in the stand-by mode,

unplug the amplifier from the AC wall outlet to reset the protection

circuit. Check the loudspeakers and loudspeaker cables for poten-

tial short circuits before plugging the amplifier back into the wall

outlet.

10 Krell S–1500 Multi-channel Amplifier

Front Panel Description

See Figure 1 on page 9

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