Krell Industries S-300i User manual

S–300i
Remote Control
Integrated Amplifier
Instructions for Use
Owner’s Reference

K r e l l ®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 trademarks and tradenames are registered to their respective companies.
© 2008 by Krell Industries, Inc. All rights reserved
Krell Industries, Inc.
45 Connair Road
Orange, CT 06477-3650 USA
T E L 2 0 3 - 7 9 9 - 9 9 5 4
FAX [phone]
E - M A I L k r e l l @ k r e l l o n l i n e . c o m
WEBSITE http://www. k r e l l o n l i n e . c o m
Do not place the integrated amplifier where it could be exposed to dripping or
s p l a s h i n g .
The ventilation grids on the top and bottom of the S-300i must be unobstructed at
all times during operation. Do not place flammable material on top of or beneath
the component.
When making connections to this or any other component, make sure all compo-
nents are off. Turn off all systems’power before connecting the S-300i to any
other component. Make sure all cable terminations are of the highest quality, free
from frayed ends, short circuits, or cold solder joints.
THERE ARE NO USER-SERVICEABLE PA R TS INSIDE A N Y K R E L L P R O D U C T.
Please contact your authorized dealer, distributor, or Krell if you have any ques-
tions not addressed in this reference manual.
S - 3 0 0 i
Remote Control Integrated Amplifier
Instructions for Use
v 1.0
C O N TACT
I N F O R M AT I O N
WA R N I N G S

Krell S-300i i i i
C o n t e n t s
P a g e
I N T R O D U C T I O N 1
DEFINITION OF T E R M S 2
U N PACKING 4
P L A C E M E N T 5
AC Power Guidelines 5
Power Cord 5
F R O N T PA N E L / REMOTE CONTROL D E S C R I P T I O N 7
REMOTE CONTROL O N LY 9
Battery Installation and Removal 9
Remote Control Only Functions 9
BACK PA N E L D E S C R I P T I O N 1 2
CONNECTING THE S - 3 0 0 i TO YOUR SYSTEM 1 4
Connection Steps 1 4
O P E R ATING YOUR S - 3 0 0 i 1 5
Amplifier Operation 1 5
O P T I O N A L C O N F I G U R AT I O N S 1 7
Configuring the S - 3 0 0 i 1 7
Balance 1 8
Input Balance Trim 1 8
Input Level Trim 1 9
Theater Mode 1 9
Display 2 0
Mute 2 1
Input Trigger 2 1
Output Trigger 2 2
AC Mains 2 3
Input Name 2 4
Info 2 4
HOW TO T R O U B L E S H O O T SYSTEM NOISE 2 6
QUESTIONS AND A N S W E R S 2 7
WA R R A N T Y 2 8
RETURN A U T H O R I Z ATION PROCEDURE 2 9
S P E C I F I C AT I O N S 3 0

i v Krell S-300i
I l l u s t r a t i o n s
FIGURE 1 The S-300i Front Panel 6
FIGURE 2 The S - 3 0 0 i Remote Control 6
FIGURE 3 The S - 3 0 0 i Back Panel 11
P a g e

Krell S-300i 1
I n t ro d u c t i o n
Thank you for your purchase of the Krell S-300i Remote Control
Integrated A m p l i f i e r. This fully integrated amplifier and preamplifier
has a discrete signal path from input to output and employs a wide
bandwidth design with low negative feedback for sonic accuracy
throughout the frequency spectrum. All circuits up to the driver
stage are balanced and pure Class A.
K r e l l ’ s new surface mount technology (SMT) means that the S-
300i is an integrated amplifier with big power—150 Watts per
channel—that does not require big space. SMT allows individual
circuit elements to be placed very close together. This shortens
signal paths and allows circuit elements to operate at the same
temperature, resulting in more accurate signal transfer and
enhanced reliablilty.
The S-300i is easy to operate and integrate into your system. T h e
remote control accesses all amplifier functions, and remote control
connection options allow the S-300i to be easily connected with
other components. The Theater Throughput feature provides easy
integration of the amplifier into a home theater
s y s t e m .
This owner’s reference manual contains important information on
the placement, installation, and operation of the S-300i. Please
read this information carefully. A thorough understanding of these
details will help ensure satisfactory operation and long life for your
S-300i and related system components.

Definition of Te r m s
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 balance management of Krell home theater systems.
Balanced
A symmetrical 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 completely immune to induced noise
from the system or the environment.
S i n g l e - e n d e d
A two-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 are not recom-
mended for connections requiring long cable runs.
i P o d
A direct balanced input carried via a special termination utilizing a
30-pin connector. This connection is designed specifically for iPods
and allows charging and control functions in addition to music
p l a y b a c k .
C O N F I G U R AT I O N S
INPUT AND OUTPUT
C O N N E C T I O N S
2 Krell S-300i

Definition of Te r m s , c o n t i n u e d
O f f
The component is off when the rear panel button is not depressed.
Stand-by Mode
A low power consumption status that keeps the audio circuits at
idle. When you press the rear panel power button, the red stand-
by LED illuminates. The component is now ready to be switched to
the operational mode. Krell recommends leaving the component in
the stand-by mode when it is not playing music.
Operational Mode
When the component is in the stand-by mode, and you press the
power button on the front panel or the power key on the remote
control, the blue power LED illuminates. The component is in the
operational mode and is ready to play music.
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 wide bandwidth capabilities.
T E C H N O L O G Y
Krell S-300i 3
O P E R AT I O N

4 Krell S-300i
U n p a c k i n g
Follow these steps to safely unpack the S-300i:
1 . Open the shipping box and remove the top layer of foam. T h e
S-300i and the S-300i accessory kit containing the following
items are visible:
1 AC power cord
1 S-300i remote control
1 30-Pin iPod connection cable
1 packet containing the Quick Setup Guide
and the warranty registration card
2 . Grasp the underside of the amplifier and lift it straight out of
the packing box.
3 . Place the amplifier in a safe location and remove the protective
plastic wrapping.
If any of these items are not included please contact your authorized
Krell dealer.
Save all packing materials. If you must ship your S-300i in the future,
repack the unit in its original packaging to prevent shipping damage.
N o t e s

Krell S-300i 5
P l a c e m e n t
Before you install the S-300i into your system, review the following
guidelines to choose the location for the S-300i. This will facilitate
a clean, trouble-free installation. The S-300i does not require any
type of special rack or cabinet for installation. For the dimensions
of the S-300i, see S p e c i f i c a t i o n s, on the back cover.
Place the S-300i on a firm, level surface, away from excessive
heat, humidity, or moisture. The S-300i requires at least 1 inch
(2.54 cm) of clearance on each side and at least two inches (5 cm)
of clearance above the component to provide adequate ventilation.
Installations inside cabinetry may need extra ventilation.
The S-300i is not hum-sensitive. Other components may be
placed on or around the S-300i (make sure ventilation grids
remain unobstructed).
Place the amplifier as close to the loudspeakers as possible and
keep loudspeaker cable lengths to a minimum. Loudspeaker cable
adds impedance to the load the amplifier must drive, regardless of
the cable’s gauge. All Krell amplifiers drive the lowest impedances
with ease, but long loudspeaker cables reduce the maximum
power that can be delivered to the loudspeakers.
The S-300i has superb regulation and does not require a dedicat-
ed AC circuit. Avoid connections through extension cords or multi-
ple AC adapters. High quality 15 amp grounded AC strips are
acceptable. High quality AC line conditioners or filters may be
used if they are grounded and meet or exceed the unit’s maximum
power consumption of 1800 Wa t t s .
The S-300i should be operated with the power cord
supplied and connected directly to the AC power outlet. Please
contact your authorized Krell dealer, distributor, or Krell before
using any devices designed to alter or stabilize the AC power for
the S-300i.
AC Power
G u i d e l i n e s
Power Cord

F i g u re 1 The S-300i Front Panel
F i g u re 2 The S-300i Remote Contro l
N o t e Some remote control keys listed above function with other current Krell
components. Consult the Krell reference manual for each model to review
your component’s full remote control capabilities.
6 Krell S-300i
P o w e r
1 Power BUTTON
2 Power LED
3 Infrared Sensor
Input Devices
5 S-1, S-2, S-3, B-1 and
iPod Buttons or Keys
7 Volume Level Knob or
Level / Navigation Keys
Mode Control
6 MENU Button or Key
8 ENTER Button or Key
9 Display Wi n d o w
1 2 Direct iPod control keys
Volume Adjustment
F u n c t i o n s
1 0 Bal (Balance) Keys
( R e m o t e )
Buttons for other KRELL p r o d -
u c t s
11 Amp option select
1 3 CD/ DVD transport control