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 203-891-2028
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 components 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 RTS 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 questions 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 L Y 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 A TION 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 r o 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 S300i 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 reference 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 volume 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 installations, balanced connections have 6 dB more gain than singleended 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 singleended connections as the ground connection is made last and
broken first. Turn the system off prior to making or breaking singleended connections. Single-ended connections are not recommended 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 standby 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.
I
f 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 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 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
F r ont Panel/Remote Control Description
See Figures 1 and 2 on page 6
Krell S-300i 7
P o w e r , analog input selections, and volume control accessed via
the front panel of the S - 3 0 0 i are described in the illustration legend
b e l o w. The front panel display shows volume and balance levels,
and Theater Throughput status. Most front panel features can also
be activated via the keys on the remote. Descriptions of special
operational features of the remote control are outlined on pages 91 0 :
1 Power Button or Key
Use this button to switch the S - 3 0 0 i between the stand-by and the
operational modes.
2 Stand-by LED
The red stand-by LED illuminates when the S - 3 0 0 i is plugged into
a standard AC wall receptacle and the rear panel power button is
pressed, indicating that the amplifier is in the stand-by mode and
ready to be switched to the operational mode.
3 Infrared Sensor
The infrared sensor receives commands from the S-300i r e m o t e
control. For proper remote control operation, make sure that nothing is obstructing the infrared sensor.
4 S-1, S-2, S-3, B-1 and iPod Buttons and Keys
Use these buttons to select a balanced analog source component
(B-1) via an XLR connector or a single-ended analog source component (S-1, S-2, or S-3) via single-ended RCA connectors or an
IPod input via a special 30-pin connector.
5 Mute Button or Key
Use this button to interrupt the signal of the input you have selected. To unmute, press the mute button again.
6 Menu Button or Key
Use this button or key to access the menu functions of the S-300i.
PO W E R
A N A L O G
S O U R C E
C O M P O N E N T S
8 Krell S-300i
F r ont Panel Description,
c o n t i n u e d
7 Level Knob / Level Keys
The level knob on the front panel or the level keys on the remote
control adjust the amplifier output level. The output level is indicated numerically on the front panel display, with a range from 0-151.
8 Level Control Knob / Enter Key
Use this button or key to configure the menu functions of the S-300i
9 Front Panel Display
The front panel display shows volume and balance levels and
Theater Throughput status.
10 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 (9). To display
balance, push any key on the remote.
The front panel display indicates:
“
C E N
“
when the system is balanced. If the system is not balanced, the
front panel display indicates that the balance is right or left of center and by how much, on a scale of 1(least out of balance) to
5
(most out of balance).
Example: A display of:
“ R + 3 “
means that the balance is moderately right of center. A display of:
“ L + 5 “
means the balance is severely left of center.
11 Select (SEL) Key -
for use with other KRELL P r o d u c t s
Used to select advanced meter or display functions on other Current
K R E L L p r o d u c t s .
MODE INDICAT O R S
VOLUME ADJUSTMENT
F U N C T I O N S
Remote Control Only
See Figure 2 on page 6
Krell S-300i 9
The S - 3 0 0 i remote control uses two A A A alkaline batteries, which
are included with the shipment.
To open the battery compartment on the back of the remote
c o n t r o l :
1 . Place the remote face down on the table.
2 . Use T-8 Torx wrench to remove the bottom cover.
Do not use a knife or other sharp objects to open the battery compart ment; they will scratch the remote control finish.
3 . Insert two A A A batteries with their flat (-) Ends touching the
springs in the battery holder.
4 . Screw bottom cover back onto the remote
The remote control is ready for operation.
Replace batteries when remote control function becomes intermittent.
Remove batteries if the remote control is not used for a long period of
time. Battery leakage can damage the remote control.
The S - 3 0 0 i remote control accesses complete power amplifier and
preamplifier functions. A description of the functions unique to the
S - 3 0 0 i f o l l o w :
N o t e
N o t e s
B a t t e ry
I n s t a l l a t i o n
and
R e m o v a l
Remote Control
Only Functions
Remote Control Functions,
continued
1 0 Krell S-300i
12 Direct iPod Functions
With an iPod connected to the special 30-pin connector, basic control functions are available from the remote control.
Button Description from Left to Right:
Play/ pause
Previous Tr a c k
Next Tr a c k
Next List (Next playlist)
Menu (accesses iPod Menu)
Left wheel rotation (simulates iPod left circular motion)
Enter (selects track or option)
Right wheel rotation (simulates iPod right circular motion)
Previous List (Previous playlist)
13 CD / DVD Transport Control -
for use with other KRELL P r o d u c t s
Used to control basic CD/ DVD functions on other Current KRELL
p r o d u c t s .
The remote control keys listed above function with the S-300i. Other keys
on this remote control may activate other Krell components, for example,
compact disc players. Consult the Krell owner’s reference manual for
each component to review your component’s full remote control capabili -
ties.
VOLUME A D J U S T M E N T
F U N C T I O N
N o t e
F i g u r e 3 The S-300i Back Panel
Krell S-300i 11
Amplifier Channel
O u t p u t s
1 4 Left and Right
Loudspeaker Outputs
Analog Inputs
1 5 Left and Right Balanced
Analog Inputs
1 6 Left and Right Single-
ended Analog Inputs
17 Direct iPod Input
Analog Outputs
1 9 Left and Right Preamp
O u t p u t s
Remote Connections
1 8 RS-232 control Port
2 0 RC-5 In
21 12 VDC Trigger In/O u t
P o w e r
22 IEC Connector
23 Line Fuse
24 Main Power Button
Back Panel Description
See Figure 3 on page 11
1 2 Krell S-300i
The S - 3 0 0 i back panel provides connections for all inputs and outputs, power on/off, and additional remote connections.
14 Left and Right Loudspeaker Outputs
The S - 3 0 0 i is equipped with standard binding posts for each
amplifier channel. These connectors accept bare wire, pins,
banana plugs, or spade lugs. Use the red terminal for the positive
connection and the black terminal for the negative connection.
15 Left and Right Balanced Analog Inputs
The S - 3 0 0 i is equipped with one pair of balanced (B-1) inputs via
XLR connectors.
16 Left and Right Single-Ended Analog Inputs
The S - 3 0 0 i is equipped with three pairs of single-ended (S-1,
S-2, or S-3) inputs via RCA c o n n e c t o r s .
17 iPod Input
The S - 3 0 0 i is equipped with a balanced stereo input via a locking
30-pin connector. The required 30-pin iPod cable is supplied.
18 RS-232
The RS-232 port receives messages from a computer-based control system, providing integrated control of all integrated functions.
The RS-232 input uses a 9-pin D-subminiature connector.
The RS-232 port does not funtion with the iPod Input..
19 Left and Right Preamp Outputs
The S - 3 0 0 i is equipped with a pair of single-ended preamplifier outputs.
20 RC-5 In
The S - 3 0 0 i is equipped with an RC-5 input that makes custom
installation easy and secure by accepting baseband RC-5 input
commands from a remote IR detector or hardwired remote cont r o l l e r s .
21 12 VDC In/ Out (12 V Tr i g g e r )
The 12 V Trigger allows you to turn the S-300i on or off, or to and
from stand-by, from other components.
AMPLIFIER CHANNEL
O U T P U T S
ANALOG INPUTS
ANALOG OUTPUTS
R E M O T E
C O N N E C T I O N S
N o t e
Back Panel Description,
c o n t i n u e d
Krell S-300i 1 3
O u t . T h e output sends 12 VDC (12 V trigger) power on/off signals
to other Krell components and other devices that incorporate a 12
V trigger.
I n .The input receives 12 VDC (12 V trigger) power on/off 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 advantage of the remote capability of the S-300i.
22 IEC Connector
The connector is for use with the provided IEC standard 15 amp
power cord.
23 Line Fuse
The 50/60 Hz line fuse protects the S - 3 0 0 i in case of overload or
m a l f u n c t i o n .
24 AC Power Button
Use this button to change the S-300i from off to the stand-by
m o d e .
Fuses must be replaced with the fuse value specified on the back panel.
P O W E R
N o t e s
N o t e
1 4 Krell S-300i
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 singleended connections. When level matching is critical, keep this gain
value in mind.
Follow these steps to connect the S - 3 0 0 i to your system.
1 . Make sure all power sources and components are off before
connecting inputs and outputs.
2 . Neatly organize the wiring between the S - 3 0 0 i and all system
components. Separate AC wires from audio cables to
prevent hum or other unwanted noises from being introduced
into the system.
3 . Connect the left and right loudspeaker cables to the integrated
a m p l i f i e r ’s left and right loudspeaker output terminals (14).
The S-300i uses standard binding posts for each amplifier
channel. These connectors accept bare wire, pins, bananna
jacks or spade lugs. Use the red terminal for the positive connection and the black terminal for the negative connection.
4. Connect the left and right outputs of your source components to
the appropriate analog inputs (15, 16, 17) on the S-300i.
The S - 3 0 0 i is equipped with one balanced input (B-1), three single-ended inputs (S-1, S-2, or S-3), and one iPod input. The B1, S-1, S-2, and S-3 inputs can be configured for T h e a t e r
Throughput. See Optional Configurations, on page 17 for
information on configuring an input for Theater Throughput.
5 . Use the preamp outputs (19) to connect to an additional power
a m p l i f i e r.
6 . Plug the AC cord into the IEC connector (22) on the back
panel of the S-300i. Plug the remaining end into the AC wall
receptacle. Press the Power Button on the rear panel, The red
stand-by LED (2) illuminates and the display shows the software version.
Pin 1 Shield (ground)
Pin 2 Non-inverting (hot) (0°)
Pin 3 Inverting (cold) (180°)
Connecting the
S-300i
to Your System
USING BALANCED
C O N N E C T I O N S
C o n n e c t i o n
S t e p s
Pin assignments for the
XLR connectors
Krell S-300i 1 5
This section provides information about operating the S - 3 0 0 i. T h e
S-300i provides input selection,volume control operation and any
of the various menu functions via the front panel. The remote control includes additional source, preamp and amplifier functions as
well. See Remote Control Only, on page 9, for more information.
After the S - 3 0 0 i is connected to AC power and in the stand-by
mode, use the power button or key (1) to switch the component
to the operational mode. The blue power LED (2) illuminates.
The S - 3 0 0 i Remote Control Integrated Amplifier is easy to operate.
H o w e v e r, great care should be exercised when operating a system
that includes the S - 3 0 0 i, because of the amplifier’s power output.
Switching between active sources without muting the preamplifier
output, or bumping/miscuing a device, can generate large transients at low frequencies. The S - 3 0 0 i may generate enough power
with these transients to damage most loudspeakers. To avoid
damage, be sure to switch all sources with the preamplifier level
either muted or fully attenuated.
Krell amplifiers have large reserves of clean power and can safely drive
loudspeakers to higher sound pressure levels than other amplifiers.
H o w e v e r, use care when setting high playback levels and lower the vol ume level at any sign of loudspeaker distress.
When powering up any system, always turn amplifiers on last.
When powering down, always turn amplifiers off first.
1 . When the amplifier is in stand-by mode, with the red stand-by
LED (2) illuminated, turn the amplifier on by pressing the
power button on the front panel or the power key on the
remote control (1). There is an audible click. The blue power
LED (2) illuminates. The S-300i is now in the operational
m o d e .
2 . With the amplifier in the mute position, or the volume control
fully attenuated, select a source from the front panel or the
remote control (4).
Operating Your
S-300i
A m p l i f i e r
O p e r a t i o n
N o t e
ON/OFF AND
S TA N D - B Y O P E R AT I O N
1 6 Krell S-300i
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
( 7 ) .
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 (2) illuminates.
It is now safe to turn off the rest of the system.
When changing sources, lower the volume to off or mute the output. This
ensures that the next source played does not damage your system with a
high output transient.
Operating Your S-300i,
c o n t i n u e d
N o t e
ON/OFF AND STA N D - B Y
O P E R A TION, c o n t i n u e d
The S - 3 0 0 i is equipped with a pair of single-ended preamplifier
outputs (19). These outputs enable the S - 3 0 0 i to be used as a
preamplifier when it is connected to a separate amplifier.
The amplifier channel outputs are always active, even when the S-300i is
being used only as a preamplifier.
N o t e
P r e a m p l i f i e r
O u t p u t
Krell S-300i 1 7
Customizing the S-300i
The S-300i menu allows you to configure the following functions.
You can also use the menu to review version information about
the software.
Navigation Conventions
Navigating the S-300i menu is straightforward and consistent
throughout.
(6) Menu Button or Key
To enter the menu, press the menu button on the preamplifier
front panel or the menu key on the remote control. Once you are
in the menu, you can press the menu button or key to exit the
menu.
(7) Volume Knob or Level Keys
Use the level control knob on the preamplifier front panel or the
volume up and down keys on the remote control to scroll forward
and backward through the menu hierarchy. Each menu list is a
continuous loop.
(8) Level Control Knob or Key
Press the level control knob on the preamplifier front panel or the
enter key on the remote control to select a function or a configuration option, and to confirm a selection.
(9) Front Panel Display
The display shows the active function and configurable options.
Optional Configurations
1 8 Krell S-300i
Optional Configurations,
c o n t i n u e d
Menu Features and Functions
Balance
This function enables you to adjust the balance between the left
and right output channels. The options are: CENTER, Left 1-5dB,
Right 1-5 dB,All Left, or All Right. The remote control has direct
(10) keys to make these adjustments. For front panel adjustment
follow the steps listed below.
Enter the menu, then:
1. Use the level control knob on the preamplifier front panel or to
select: BALANCE.
2. Press the level control knob on the preamplifier front. The front
panel display (9) shows the default mode: CENTER.
3. Use the level control knob to select the desired balance option
from +1 to +5 dB, in 1dB increments, left or right.
4. Press the level control knob to confirm the selection. The front
panel display reads: BALANCE.
5. Press Menu to Exit out.
Input Balance Trim
This function enables you to adjust the balance between the left
and right channels individually for each input. The options are:
CENTER, L 1-6 dB, R 1-6 dB.
Enter the menu, then:
1. Use the level control knob on the preamplifier front panel or
volume up and down keys (7) on the remote control to select:
INPUT BALANCE TRIM.
2. Press the level control knob on the preamplifier front panel or
the enter key (8) on the remote control. The front panel display
(9) shows the default mode: S-1.
3. Use the level control knob or the up and down keys to select
the desired input: S-1, S-2, S-3, B-1or iPod.
4. Press the level control knob or key. The display (3) shows
the default mode: CENTER.
5. Use the level control knob or the volume up and down keys to
select the desired balance trim from +1 to +6 dB, in 1 dB
increments, left or right.
6. Press the level control knob or key to confirm the selection. The
front panel display reads: INPUT BALANCE TRIM.
Input Level Trim
This function enables you to select a GAIN offset individually for
a particular input. The options are: +/-6 dB, in 1 dB increments.
Enter the menu, then:
1. Use the level control knob on the preamplifier front panel or the
up and down keys (7) on the remote control to select: INPUT
LEVEL TRIM.
2. Press the level control knob on the preamplifier front panel or
the enter key (8) on the remote control. The front panel display
(9) shows the default mode: S-1
3. Use the level control knob or the up and down keys to select
the desired input: S-1, S-2, S-3, B-1 or iPod.
4. Press the enter button or key. The front panel display shows the
level trim last entered. The default mode is: 0 dB.
5. Use the level control knob or the up and down keys to select
the desired trim option: +/-6 dB, in 1 dB increments.
6. Press the enter button or key to confirm the selection. The front
panel display shows the selected input.
Theater Mode
This function enables you to select theater mode volume for a
particular input. Use this function when connecting the output of a
preamp/processor to the S-300i for home theater applications.
Configuring an input for theater mode sets that input for unity
gain, and suspends the level control of the S-300i. Volume
adjustments are then made through the preamp/processor connected to the input configured for theater mode on the S-300i.
The options are: ON, OFF.
Enter the menu, then:
1. Use the level control knob on the preamplifier front panel or the
up and down keys (7) on the remote control to select
THEATER.
2. Press the level control knob on the preamplifier front panel or
the enter key (8) on the remote control. The front panel display
(9) shows the default mode: None.
HOW TO ACTIVATE
AN INPUT FOR
T H E AT E R
T H R O U G H P U T
Krell S-300i 1 9
Optional Configurations,
c o n t i n u e d
I M P O R TA N T
3. Use the level control knob or the Volume up and down keys to
select the desired input: S-1, S-2, S-3 or B-1.
4. Press the enter button or key to confirm the selection.
S-1, S-2, S-3 or B-1
The selected input is set to THEATER and the volume control is disengaged for that input on the S-300i.
OFF
ALL inputs are configured normally and the volume control is engaged
for all inputs on the S-300i.
Note
Only one input on the S-300i can be in theater mode at a time. if the
input trigger is configured for THEATER, the S-300i selects the theater
input automatically upon power on. See Input Trigger, on pages 35-36.
Display
This function enables you to turn the front panel display (9) on or off
all the time, or turn it off after a time out. It also allows the adjustment of display brightness. The options are: ON, TIMED, or OFF.
Enter the menu, then:
1 . Use the level control knob on the preamplifier front panel or the
volume up and down keys on the remote control (7) to select:
D I S P L AY.
2 . Press the level control knob on the preamplifier front panel or
the enter key (8) on the remote control. The front panel display
(9) shows the default mode: M O D E .
3 . Press the level control knob or key (8) again. The front panel
display shows the default mode: ON.
4 . Use the level control knob or the volume up and down keys to
select the desired option: ON,Timed or OFF.
5 . Press the level control knob or key to confirm the selection. The
front panel display reads: MODE.
6 . Use the level control knob or the volume up and down keys to
select: BRIGHTNESS.
2 0 Krell S-300i
Optional Configurations,
c o n t i n u e d
7 . Press the level control knob or key. The front panel display shows
the default mode: HIGH.
8 . Use the level control knob or the volume up and down keys to
select the desired brightness: LOW, MED, or HIGH.
9 . Press the level control knob or key to confirm the selection. The
front panel display reads: BRIGHTNESS.
O N
The front panel display is always on.
T I M E D
The front panel display turns off after 30 seconds.
B R I G H T N E S S
Controls the brightness of the display. When the mode setting is OFF, the
display is at the brightness selected when in menu mode, and turns completely off when you leave the menu mode.
Mute
This function enables you to control the mute mode. Options are:
FULL, -20 dB.
Enter the menu, then:
1. Use the level control knob, or the volume up and down keys (7)
to select: MUTE.
2. Press the level control knob on the preamplifier front panel or
the enter key (8) on the remote control. The front panel display
(9) shows the default mode: FULL.
3. Use the level control knob, or the up and down volume keys to
select the desired option: FULL or -20 dB.
4. Press the level control knob or key to confirm the selection. The
front panel display reads: MUTE.
FULL
The speaker and preamp outputs are completely silenced.
-20dB
The speaker and preamp outputs are reduced by 20 dB and may still be
audible.
Input Trigger
This function enables you to configure the input trigger. The
options are: Off, Normal, Theater.
Krell S-300i 2 1
Optional Configurations,
c o n t i n u e d
Enter the menu, then:
1. Use the level control knob on the preamplifier front panel or the
up and down keys on the remote control to select: INPUT
TRIGGER.
2. Press the level control knob on the preamplifier front panel or
the enter key (8) on the remote control. The front panel display
(9) shows the last input trigger setting. the default mode is:
NORMAL.
3. Use the level control knob or the up and down keys to select
the desired
option: OFF, NORMAL, or THEATER.
4. Press the enter button or key to confirm the selection. The front
panel display reads: INPUT TRIGGER.
OFF
The S-300i does not respond to 12 V input trigger commands.
NORMAL
The S-300i responds to 12 V input trigger commands.
THEATER
The S-300i responds to 12 V input trigger commands, and the input for
which theater mode is enabled is selected automatically. See Theater
Mode, on page 19.
Output Trigger
This function enables you to turn the 12 Volt output trigger (24)
on or off, or configure it with a delay of up to 30 seconds. The
options are: OFF, ON, DELAY.
Enter the menu, then:
1. Use the level control knob on the preamplifier front panel or vol
ume up and down keys (7) on the remote control to select:
OUTPUT TRIGGER.
2. Press the level control knob on the preamplifier front panel or
the enter key (8) on the remote control. The front panel display
(9) shows the default mode: TRIGGER.
3. Use the level control knob or volume up and down keys to
select: OFF, ON, or DELAY.
2 2 Krell S-300i
Optional Configurations,
c o n t i n u e d
4. Select DELAY. You are prompted to enter a delay time of 0-30
seconds.
5. Enter the delay time.
6. Press enter to confirm the selection. The display reads: DELAY.
7. Use the level control knob or volume up and down keys to scroll
to: BACK.
ON
The 12 Volt trigger output is enabled at power on for the selected trigger
(Trigger 1 or 2).
OFF
The 12 Volt trigger output is disabled at power on for the selected trigger (Trigger 1 or 2).
DELAY
The 12 volt trigger output is enabled at power on after a delay of 0-30
seconds.
AC Mains
This function enables you to operate the S-300i from a switched
AC outlet. If AC Mains is set to On, the preamplifier turns on after
a brief delay, by-passing stand-by. Thereafter, you may switch the
preamplifier to and from stand-by, using the power button or
power key (1). The options are: OFF, ON
Enter the menu, then:
1. Turn the level control knob on the preamplifier front panel or
up and down keys (10) on the remote control to select: AC
MAINS.
2. Press the level control knob on the preamplifier front panel or
the enter key (8) on the remote control. The front panel display
(9) shows the default mode: OFF
3. Use the level control knob or the up and down keys to
select the desired option: OFF or ON.
4. Press the enter button or key to confirm the selection. The
front panel display reads: AC MAINS.
OFF
The S-300i remains in stand-by mode when AC power is applied.
Input Name Options
AUX, AUX1, AUX2, AUX3
B L U R AY, BYP, CABLE, CD, CD1, CD2, CD-
R, COMP
DAC, DAT, DCC, DISC, DISC 1, DISC 2,
DISC 3, DSS, DVD, DVD1, DVD2, DVD3,
DVD-A, DVR,EQ, GAME, HI-8, HD, HD-DVD,
IPOD, LD, LD1, LD2, LINE 1, LINE 2, LINE 3,
LINE, MDISC, MIXER, MON, MP3
PHONO, PHONO1, PHONO2, PROC
SACD, SAT, SAT1, SAT2, SRC1, SRC2,
SRC3, SURR,
S - V I D
TAPE1, TAPE2, TAPE3, TAPE, TEST, TUNER,
TUNER1, TUNER2, TV,
VCR, VCR1, VCR2, VCR3, VDISC, VIDEO,
VIDEO1, VIDEO2, VIDEO3, 8MM, 8TRK
Krell S-300i 2 3
Optional Configurations,
c o n t i n u e d
ON
The S-300i turns on automatically, remaining in stand-by mode only for
a brief warm-up period, when ac power is applied.
Input Name
This function enables you to select a device name for each input.
The input name options are listed in the left margin, on this page.
Enter the menu, then:
1. Use the level control knob on the preamplifier front panel or up
and down keys (14) on the remote control to select: INPUT
NAME.
2. Press the level control knob on the preamplifier front panel or
the enter key (8) on the remote control. The front panel display
(9) shows the default mode: S-1.
3. Use the level control knob or the up and down keys to select
the desired input: S-1, S-2, S-3 or B-1.
4. Press the enter button or key. The front panel display shows no
characters.
5. Use the level control knob or the up and down keys to select
the desired input name, from the input name options listed at
left.
6. Press the enter button or key to confirm the selection and return
to the input list, in Step 3. The front panel display shows the
input name.
To select input names for other inputs, repeat Steps 3 and 4.
Info
This function enables you to access information about the preamplifier software.
Enter the menu, then:
1. Use the level control knob on the preamplifier front panel or vol
ume up and down keys (7) on the remote control to select:
INFO.
2. Press the level control knob on the preamplifier front panel or
the enter key (8) on the remote control. The front panel display
(9) shows the software version number.
2 4 Krell S-300i
Optional Configurations,
c o n t i n u e d
Configuration
This function enables you to access factory default settings or
your own saved settings. The options are: RECALL, SAVE, or
FACTORY DEFAULT.
Enter the menu, then:
1. Use the level control knob on the preamplifier channel front
panel or up and down keys (7) on the remote control to select:
CONFIGURATION.
2. The front panel display (9) shows the default mode: FACTORY
DEFAULT.
3. Use the level control knob or the volume up and down keys to
select the desired option: FACTORY, RECALL or SAVE.
4. Press the enter button or key to confirm the selection. The front
panel display reads: CONFIGURATION
FACTORY
Recalls the factory settings.
RECALL
Recalls settings previously stored in memory using the SAVE function.
SAVE
Saves the current settings in memory overwriting any previously saved
settings.
Krell S-300i 2 5
Optional Configurations,
c o n t i n u e d
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 loudspeakers when you
place the S - 3 0 0 i amplifier into the system, follow these simple
troubleshooting steps:
1 . Check all cable terminations, making sure they have solid sol-
der joints and are of sound construction.
2 . With the amplifier off, remove the interconnect cables, then
turn the amplifier on. If the hum disappears, turn the amplifier
o f f and reinsert one of the interconnect cables. Turn the
amplifier back on. If the hum reappears with one or both
cables reinserted, there may be a defective cable. Have the
interconnect cables checked before proceeding.
3 . If the interconnect cables are sound, you may be experiencing
a ground loop. Please contact your authorized Krell dealer,
d i s t r i b u t o r , or Krell for suggestions on how to solve this
p r o b l e m .
How to Troubleshoot System Noise
2 6 Krell S-300i
Q . Should I leave my S - 3 0 0 i 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 turn off the rear panel power button.
Q . When I turn on the amplifier there is a loud hum through the
loudspeakers. What should I do?
A . When a new component is introduced into a system, a low
frequency hum may occur in one or both loudspeakers. Check
all input and output connections, making sure they are of
sound construction. See How to Troubleshoot System Noise
,
on page 19. If the interconnects and cables are sound, you
may be experiencing a ground loop. This can often be easily
eliminated. Please contact your authorized Krell dealer, distribu t o r, or Krell for suggestions on how to solve this
problem.
Q . When I use the S - 3 0 0 i’s Theater Throughput capability with my
surround sound processor, where should I set the
volume on the S - 3 0 0 i?
A . You do not need to set the volume on the S - 3 0 0 i because the
a m p l i f i e r ’s volume and balance controls are not active in the
Theater Throughput mode. When using the S - 3 0 0 i’s T h e a t e r
Throughput capability, the surround sound processor controls
the system volume. See Optional Configurations, on page 17.
Questions and Answers
Krell S-300i 2 7
This Krell product has a limited warranty of five years for parts and labor on circuitry from
date of purchase or six years from date of original shipment from the Krell factory. 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 warranty on this page shall be in lieu of any other warranty, expressed or implied,
including, but not limited to, any implied warranty of merchantability or fitness for a
particular purpose. There are no warranties which exceed beyond those described in this
document. If this product does not perform as warranted herein, the owner’s sole remedy
shall be repair. In no event will Krell be liable for incidental or consequential damages
arising from purchase, use, or inability to use this product, even if Krell has been advised of
the possibility of such damages.
Proof of purchase in the form of a bill of sale or receipted invoice substantiating that the unit
is within the warranty period must be presented to obtain warranty service. The warranty
begins on the date of retail purchase, as noted on the bill of sale or receipted invoice from
an authorized Krell dealer or distributor.
The warranty for Krell products is valid only in the country to which they were originally
shipped, through the authorized Krell distributor for that country, and at the factory. T h e r e
may be restrictions on or changes to Krell’s warranty because of regulations within a
specific country. Please check with your distributor for a complete understanding of the
warranty in your country.
If a unit is serviced by a distributor who did not import the unit, there may be a charge for
service, even if the product is within the warranty period.
Freight to the factory is your responsibility. Return freight within the United States (U.S.A.) is
included in the warranty. If you have purchased your Krell product outside the U.S.A. and
wish to have it serviced at the factory, all freight and associated charges to the factory are
your responsibility.
Krell will pay return freight to the U.S.A.-based freight forwarder of your choice. Freight and
other charges to ship the unit from the freight forwarder to you are also your responsibility.
Krell is not responsible for any damage incurred in transit. Krell will file claims for damages
as necessary for units damaged in transit to the factory. You are responsible for filing claims
for shipping damages during the return shipment.
Krell does not supply replacement parts and/or products to the owner of the unit.
Replacement parts and/or products will be furnished only to the distributor performing
service on this unit on an exchange basis only; any parts and/or products returned to Krell
for exchange become the property of Krell.
No expressed or implied warranty is made for any Krell product damaged by accident,
abuse, misuse, natural or personal disaster, or unauthorized modification.
Any unauthorized voltage conversion, disassembly, component replacement, perforation of
chassis, updates, or modifications performed to the unit will void the warranty.
The operating voltage of this unit is determined by the factory and can only be changed by
an authorized Krell distributor or at the factory. The voltage for this product in the U.S.A.
cannot be changed until six months from the original purchase date.
In the event that Krell receives a product for warranty service that has been modified in any
way without Krell authorization, all warranties on that product will be void. The product will
be returned to original factory layout specifications at the owner’s expense before it is
repaired. All repairs required after the product has been returned to original factory specifications will be charged to the customer, at current parts and labor rates.
All operational features, functions, and specifications and policies are subject to change
Wa rr a n t y
To register your product
for warranty benefits,
please complete and re t u rn
the Wa rranty Registration
C a r d enclosed in the shipping box within 15 days of
p u r chase. Thank you.
2 8 Krell S-300i
R e t u rn Authorization
P r o c e d u re
If you believe there is a problem with your component, please contact your dealer, distributor, or the Krell factory to discuss the
problem
before
you return the component for repair. To expedite
service, you may wish to complete and e-mail the Service Request
Form in the Service section of our website at:
h t t p : / / w w w . k r e l l o n l i n e . c o m
To return a product to Krell, please follow this procedure so that
we may serve you better:
1 . Obtain a Return Authorization Number (R/A number) and ship-
ping address from the Krell Service Department.
2 . Insure and accept all liability for loss or damage to the product
during shipment to the Krell factory and ensure all freight (shipping) charges are prepaid.
The product may also be hand delivered if arrangements with the
Service Department have been made in advance. Proof of purchase will be required for warranty validation at the time of hand
d e l i v e r y.
Use the original packaging to ensure the safe transit of the product
to the factory, dealer, or distributor. Krell may, at its discretion, return
a product in new packaging and bill the owner for such packaging if
the product received by Krell was boxed in nonstandard packaging
or if the original packaging was so damaged that it was unusable. If
Krell determines that new packaging is required, the owner will be
notified before the product is returned.
HOW TO RETURN
A PRODUCT
I M P O R TA N T
To purchase additional packaging, please contact your authorized
Krell dealer, distributor, or the Krell Service Department for assist a n c e .
HOW TO PURCHASE
ADDITIONAL PA C K I N G
To contact the Krell Service Department:
T E L 2 0 3 - 7 9 9 - 9 9 5 4
M o n d a y - F r i d a y, 9:00 am to 5:00 pm EST
FA X 2 0 3 - 7 9 9 - 9 7 9 6
E - M A I L s e r v i c e @ k r e l l o n l i n e . c o m
W E B S I T E h t t p : / / w w w . k r e l l o n l i n e . c o m
HOW TO EXPEDITE
S E RV I C E
Krell S-300i 2 9
FREQUENCY RESPONSE
20 Hz–20 kHz
+0 dB, -0.14 dB
SIGNAL-TO-NOISE RAT I O
“A” weighted
90 dB
T O TAL HARMONIC
D I S T O R TION (THD)
1 kHz <0.04%
20 kHz <0.25%
G A I N
32.5 dB
INPUT SENSITIVITY
0.82 Vr m s
INPUT IMPEDANCE
47 kOhms single-ended
94 kOhms balanced
OUTPUT IMPEDANCE
0.15 Ohms
POWER CONSUMPTION
Idle 20 W
Max. 1,800 W
T R A N S F O R M E R
750 VA
I N P U T S
All with Theater Thro u g h p u t
1 pair balanced via XLR connectors
3 pair single-ended
via RCA c o n n e c t o r s
1 iPod via 30-pin connector
O U T P U T S
2 loudspeaker via 5-standard
binding posts
1 pair single-ended preamp
via RCA c o n n e c t o r s
OUTPUT VOLTA G E
Peak to peak 138 V
OUTPUT POWER
8 Ohms 150 W
4 Ohms 300 W
REMOTE CONTROL
1 handheld wireless remote
1 12 VDC trigger Ouput
1 12 VDC trigger Input
1 RC-5 input via 1/8” stereo
c o n n e c t o r
D I M E N S I O N S
17.25w X 4.00h X 17.50d in.
43.82w X 10.16h X 44.45d cm
W E I G H T
S h i p p e d
51.0 lb., 23.1 kg
Unit only
43.0 lb., 19.5 kg
Krell Industries, Inc.
45 Connair Road
Orange, CT 06477-3650 USA
TEL 203-799-9954, FAX 203-891-2028
E-MAIL krell@krellonline.com
WEB SITE www.krellonline.com
S-300i
Remote Contro l
Integrated Amplifier
v 1.0
S p e c i f i c a t i o n s
All operational features, functions,
specifications, and policies are
subject to change without
n o t i f i c a t i o n .
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