Krell KAV-250-P Owners manual

Preamplifier

CONTENTSKAV-250p

Page

Krell® Industries, Inc.

45 Connair Road
Orange, CT 06477-3650 USA

TEL [phone]

FAX [phone]
E-MAIL krell @ krellonline.com

INTRODUCTION
UNPACKING
PLACEMENT

AC Power Guidelines 4

CONNECTING THE KAV-250p
TO YOUR SYSTEM 4

Inputs 4
Outputs 4
Connecting the KAV-250p 5
Additional Connections 5

PREAMPLIFIER AND REMOTE
CONTROL OPERATION 5

Battery Installation and Removal 6

OPTIONAL CONFIGURATIONS ~ 8
WARRANTY

3
3
3

9

RETURN AUTHORIZATION
PROCEDURE 10

SPECI FICATIO N S 12

ILLUSTRATIONS

Page

REMOTE CONTROL
S-3/PR OPTIONAL INPUT

CONFIGURATION

7

8

© 1997 by KRELL® Industries, Inc. All rights reserved

P/N 19608,0240,0000

CE Marking

Unpacking

This product complies with the EMC direc­tive (89/336/EEC) and the low-voltage
directive (73/23/EEC).

Introduction

Thank you for your purchase of the Krell

KAV-250p. To obtain the best performance

from your KAV-250p preamplifier, pay care­ful attention to its placement, installation,

and operation. A thorough understanding of
these details will help insure satisfactory

operation and long life for the KAV-250p
and related system components.

THERE ARE NO USER-SERVICEABLE

PARTS INSIDE ANY KRELL PRODUCT.

Please contact your authorized dealer,
distributor, or KrelP, if you have any

questions not addressed in this refer­ence manual.

1. Open the box and remove the top layer of
foam. You will see these items:

1 KAV-250p
1 KAV-250p remote control
1 T-10 Torx wrench
1 AC power cord
1 packet containing the Owner’s

Reference and the Warranty
Registration Card

NOTE: ff any of these items are not includ­ed, please contact your authorized Krell
dealer or distributor immediately for assis­tance.

Carefully remove the unit and acces-

2.

sories from the box. Remove the protec-

tive plastic wrap from the unit.

NOTE: Save all packing materials. If you
must ship your KAV-250p in the future,
repack the un# in its original packaging to

prevent transit damage.

Placement

WARNINGS

The preamplifier must not be located where
it could be exposed to dripping or splashing
fluids.

Before you install the KAV-250p into your
system, review the following guidelines to
choose the location for the KAV-250p. This
will facilitate a clean, trouble-free installation.
The KAV-250p does not require any type of
special rack or cabinet for installation. For the

dimensions of the KAV-250p, see Specifi­cations, on page 12.

KRELL®KAV-250p English Page 3 of 12

Placement, continued

Connecting the KAV-250p

Place the KAV-250p on a firm level sur­face, away from excessive heat, humi-

dity or moisture. Other components may be
placed on or around the KAV-250p, since

the KAV-250p is not particularly hum sensi­tive.

You may experiment with feet or cones as

long as they are not permanently affixed to
the chassis. Any unauthorized modifications
to the electronics or chassis will void the war-

ranty.

AC Power Guidelines

WARNING

Do not remove or bypass the ground pin on
the end of the AC cord. This may cause RFI

(radio frequency interference) to be induced

into your playback system.
The KAV-250p has superb regulation and

does not require a dedicated AC circuit.
Avoid connections through extension cords
or multiple AC adapters. High quality 15 amp
grounded AC strips are acceptable. High
quality AC line conditioners or filters can be

used if they are grounded.

to Your System

WARNING

When making connections to this compo­nent or any other, make sure the power
amplifier is Off and the KAV-250p is in the

Mute or Stand-by mode. Make sure all cable

terminations are of the highest quality, free
from frayed ends, shorts, or cold solder joints.

Inputs

The KAV-250p is equipped with three pairs
of single-ended inputs via RCA connectors
(S-1, S-2, and S-3/PR), one single-ended
tape input via RCA connectors (Tape), and
one pair balanced input via XLR connectors
(B-l). The S-1 and S-2 inputs are standard
single-ended inputs. The S-3/PR has a user
configurable option. The S3/PR input is ~et
as a standard input from the factory, and it
may be set for use as a surround processor
throughput. See Optional Configurations,
on page 8.

The XLR input pin configuration is described
below:

Pin 1 Ground
Pin 2 Non-inverting (0
Pin 3 Inverting (180

°)
°)

Outputs

Outputs include one pair single-ended output

via RCA connectors, one single-ended tape

output via RCA connectors, and one pair bal­anced output via XLR connectors. Both RCA

and XLR outputs are active at all times,
allowing simultaneous connections to sepa­rate amplifiers or separate systems. Do not
connect both outputs to a single stereo ampli-

fier at one time.

Page4 of 12 English KRELL® KAV-250p