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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.

Summary of Contents for S-300i

Page 1: ...S 300i Remote Control Integrated Amplifier Instructions for Use Owner s Reference ...

Page 2: ...sed to dripping or splashing 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 termina...

Page 3: ...PANEL DESCRIPTION 12 CONNECTING THE S 300i TO YOUR SYSTEM 14 Connection Steps 14 OPERATING YOUR S 300i 15 Amplifier Operation 15 OPTIONAL CONFIGURATIONS 17 Configuring the S 300i 17 Balance 18 Input Balance Trim 18 Input Level Trim 19 Theater Mode 19 Display 20 Mute 21 Input Trigger 21 Output Trigger 22 AC Mains 23 Input Name 24 Info 24 HOW TO TROUBLESHOOT SYSTEM NOISE 26 QUESTIONS AND ANSWERS 27 ...

Page 4: ...iv Krell S 300i Illustrations FIGURE 1 The S 300i Front Panel 6 FIGURE 2 The S 300i Remote Control 6 FIGURE 3 The S 300i Back Panel 11 Page ...

Page 5: ...laced 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 The remote control accesses all amplifier functions and remote control connection options allow the S 300i to be easily connected with other components The...

Page 6: ...nced 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 Single ended 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 break...

Page 7: ...d 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 ...

Page 8: ... 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 fut...

Page 9: ...lace 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...

Page 10: ... remote control capabilities 6 Krell S 300i Power 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 W indow 12 Direct iPod control keys Volume Adjustment Functions 10 Bal Balance Keys Remote Buttons for other KRELL prod ucts 11 Amp optio...

Page 11: ...ndard 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 300iremote control For proper remote control operation make sure that noth ing is obstructing the infrared sensor 4 S 1 S 2 S 3 B 1 and iPod Buttons and Keys Use ...

Page 12: ...hift 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 CEN when the system is balanced If the system is not balanced the front panel display indicates that the balance is right or left of cen ter and by how much on a scale of 1 least out of balance to 5 most out of bal...

Page 13: ... remote control finish 3 Insert two AAA 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 300i ...

Page 14: ... 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 Products Used to control basic CD DVD functions on other Current KRELL products The remote control keys listed above function with the S 300i Other keys on this remote control may activate other Krell components for example co...

Page 15: ...puts Analog Inputs 15 Left and Right Balanced Analog Inputs 16 Left and Right Single ended Analog Inputs 17 Direct iPod Input Analog Outputs 19 Left and Right Preamp Outputs Remote Connections 18 RS 232 control Port 20 RC 5 In 21 12 VDC Trigger In Out Power 22 IEC Connector 23 Line Fuse 24 Main Power Button ...

Page 16: ...connectors 17 iPod Input The S 300i 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 con trol 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...

Page 17: ... 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 300i in case of overload or malfunction 24 AC Power Button Use this button to ...

Page 18: ...se connectors accept bare wire pins bananna jacks or spade lugs Use the red terminal for the positive con nection 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 TheS 300i is equipped with one balanced input B 1 three sin gle ended inputs S 1 S 2 or S 3 and one iPod input The B...

Page 19: ... 300i 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 However use care when setting high playback levels and lower the vol um...

Page 20: ...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 continued Note ON OFF AND STAND BY OPERATION continued The S 300i is equipped with a pair of single ended preamplifier outputs 19 These outputs enable the S 300i to be used as a preamplifier when it is co...

Page 21: ...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 ...

Page 22: ...ntrol 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 contr...

Page 23: ...eys 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 thea...

Page 24: ...on or off all the time or turn it off after a time out It also allows the adjust ment 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 DISPLAY 2 Press the level control knob on the preamplifier front panel or the enter key 8 on the remote control Th...

Page 25: ... 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 op...

Page 26: ...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...

Page 27: ...he 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 ...

Page 28: ... 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 ...

Page 29: ...nt 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 c...

Page 30: ...ations 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 off 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 check...

Page 31: ...shoot 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 distrib utor or Krell for suggestions on how to solve this problem Q When I use the S 300i s Theater Throughput capability with my surround sound processor where should I set the volume on the S 300i A You do n...

Page 32: ...oduct 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...

Page 33: ...rtment have been made in advance Proof of pur chase will be required for warranty validation at the time of hand delivery 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 i...

Page 34: ...ng posts 1 pair single ended preamp via RCA connectors OUTPUT VOLTAGE 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 connector DIMENSIONS 17 25w X 4 00h X 17 50d in 43 82w X 10 16h X 44 45d cm WEIGHT Shipped 51 0 lb 23 1 kg Unit only 43 0 lb 19 5 kg Krell Industries Inc 45...

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