Krell Industries K-300i Quick start guide

K-300i Integrated Amplifier

Owner’s Reference

K-300i Owner’s Reference

Table of Contents

Getting Started _____________________________________________________________________________ (3)

Unpacking / Placement / AC Power Guidelines ____________________________________________ (4)

Front Panel _________________________________________________________________________________ (5)

Rear Panel _________________________________________________________________________________ (5)

Remote Control ____________________________________________________________________________ (8)

Operation ___________________________________________________________________________________ (9)

Front Panel Menu __________________________________________________________________________ (9)

Control Options ___________________________________________________________________________ (12)

K-300i with Digital Module ________________________________________________________________ (13)

Specifications _____________________________________________________________________________ (15)

Warranty __________________________________________________________________________________ (17)

Service ____________________________________________________________________________________ (18)

Krell Contact Information _________________________________________________________________ (18)

K-300i Owner’s Reference

Getting Started

Thank you for your purchase of a Krell K-300i

component.

The K-300i Integrated Amplifier can be equipped

with or without the Optional Digital Module that is

used in the K-300i Integrated Amplifier w/Digital

model. This manual covers both K-300i models

and notes differences where appropriate.

Both K-300i models feature discrete signal paths

from input to output and employ a wide bandwidth

design with low negative feedback for sonic

accuracy throughout the frequency spectrum. All

circuits up to the driver stage operate in pure

Class A.

Krell’s surface mount technology (SMT) means that K-300i components employ the most

sophisticated circuit designs possible without requiring the typical 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 reliability. This combination of sophisticated circuitry and small space makes it possible to

design and manufacture a very high powered 150W per channel amplifier in a small enclosure. The

K-300i is easy to operate and integrate into your system. The remote control accesses all functions,

and remote control connection options allow the K-300i to be easily connected with other

components.

The Theater Throughput feature provides easy integration of these

models into a home theater

system.

The optional digital module for the K-300i Integrated

Amplifier adds a full range of digital technologies

and connections that are already included in the

K-300i Integrated Amplifier w/Digital model.

WARNING: Do not place the component where it

could be exposed to dirt or excessive moisture. The

ventilation grids on the top and bottom of the K-300i must be unobstructed at all times. Do not

place flammable material on top of or beneath the unit. When making connections to this or any

other model, make sure all components are off. Turn off all system power before connecting the K-

300i to any other component. Make sure all cable and speaker wire terminations are of the highest

quality, free from frayed ends, short circuits or cold solder joints.

This product complies with the EMC

directive (89/336/EEC) and the low-

voltage directive (73/23/EEC). This

CLASS 1 apparatus must be

connected to an AC MAIN socket

outlet with a protective earthen

connection.

WARNINGS

K-300i Owner’s Reference

Unpacking / Placement / AC Power Guidelines

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

K-300i unit and Accessories - Included

1 - AC power cord

1 - Handheld remote control

2 - AAA batteries

1 - Owner’s reference

1 - Warranty Registration card

1 - Trigger cable

1 - T-10 Torx Screwdriver

Place the K-300i on a firm, level surface, away from excessive heat, humidity, or moisture. The K-

300i is a precision instrument and should be

handled with the utmost care. Make sure the

installation location is dry and level, and able to provide adequate ventilation. The K-300i runs warm

to the touch and requires the bottom and top of the unit be free from obstruction with good

circulation of air.The bottom of the K-300i must be unobstructed to the height of the feet to ensure

proper ventilation. Do not place the K-300i on a carpeted floor. Allow a minimum of 2 inches (5cm)

above the unit for proper

ventilation, and at least one inch (2.54 cm) on each side. Additional

ventilation may be required when the unit occupies the same space with other electronics that

generate heat, like power amplifiers. Please consult an authorized KRELL dealer or KRELL

Industries to ensure proper installation.

The K-300i is designed to work all over the world. The operating voltage is determined at the factory

and

is specifically set to operate in the country of final

destination. The K-300i requires good clean

power and doesn’t require additional filtration. A 15 amp circuit is recommended for the K-300i.

Note:

The K-300i may not operate correctly when AC regeneration or voltage conversion devices are

utilized. If you choose to use such a device, at a minimum they must be rated for the maximum

power consumption of the K-300i(900 Watts).

Note:

Save all packing materials; if you need to ship the K-300i in the future, repack the unit in its

original packaging to prevent shipping damage.

Recommended Cleaning Instructions for Krell Products

Clean your Krell product gently, using a high quality lint-free cloth that has not been treated with

chemicals

of any kind. Please note the following: Do not use cleaning agents

of any kind, such as

alcohol, Windex, or other common cleaning products. Water may be used but do not spray directly

onto the unit, instead a small amount may be used on a lint-free cloth to lightly rub the exterior of the

unit.

Thank you.

K-300i Owner’s Reference

Front Panel Features

1) Power Button

2) Source Select Button

3) Navigation Buttons

4) Menu Button

5) Front Panel Display

6) IR Window

7) Volume Control Buttons

8) USB-A Connector

Rear Panel Features

Note: features 9 – 13 are only available when the digital option is installed in the unit.

9) USB-B Connector

10) Bluetooth Receiver Cover

11) HDMI Connections

12) Toslink Optical Digital Audio Input

13) S/PDIF Digital Audio Input

14) RJ45 Ethernet Connection

15) AC Mains Input and Power Switch

16) Loudspeaker Outputs

17) Preamp Output

18) Balanced Analog Audio Inputs

19) Single-Ended Analog Audio Inputs

20) RS232 Control

21) Baseband RC5 Input

22) 12VDC Trigger Input

23) 12VDC Trigger Output

K-300i Owner’s Reference

Front Panel Features Description

1) Power Button

For selecting operate or stand-by mode.

2) Source Select Button

For entering or exiting the source select mode.

3) Navigation Buttons

For making source selection or navigating the menu.

4) Menu Button

For entering or exiting the menu.

5) Front Panel Display

Displays status information in normal mode, available sources in source select mode, or

configuration information in menu mode.

6) IR Window

IR commands from the hand-held remote control are received through this window. There must

be clear line of sight from the remote control to the window for proper operation.

7) Volume Control Buttons

For controlling the speaker output level.

8) USB-A Connector

For connecting a USB flash memory stick containing digital music files. The USB stick may be

formatted as FAT or NTFS. Music playback from a USB stick is supported with the mconnect

Control app for your tablet or smart phone and is only available when the digital option is

installed in the unit.

Rear Panel Features Description

9) USB-B Connector

For connection to a computer for streaming digital audio. This will support PCM audio

data up to 192kHz/24-bits or DSD128 audio data.

10) Bluetooth Receiver Cover

The Bluetooth receiver is behind this cover. The Bluetooth range is approximately 30 feet (10

meters). This range may be reduced if the unit is placed in a metal rack which would have a

tendency to block the Bluetooth RF signal. Other RF sources operating in the 2.4GHz frequency

range may interfere with Bluetooth operation.

11) HDMI Connections

For connection of up to two HDMI source devices and one HDMI display device. The HDMI

connections support video resolutions up to 4K 50/60Hz with HDR. The HDMI inputs support 2-

channel PCM audio up to 192kHz/24-bits or 2-channel DSD128 audio. The HDMI output supports

ARC (audio return channel) and is accessed by selecting the “TV” source from the remote or front

panel. For ARC to work, the HDMI output must be connected to the ARC capable HDMI input on

the display.

12) Toslink Optical Digital Audio Input

For connection to the optical digital output of a source device. This connection carries PCM audio

data up to 96kHz/24-bits.

13) S/PDIF Digital Audio Input

For connection to the digital audio output of a source device. This connection carries PCM audio

data up to 192kHz/24-bits.

K-300i Owner’s Reference

14) RJ45 Ethernet Connection

For connection to a LAN (local area network) at speeds of 10/100 Mbps. This must be connected

to the LAN router in order to access the embedded web page or to make use of the streaming

audio features provided by the mconnect Control app (only applicable to units with the digital

option installed). The router must have access to the Internet in order to get software updates or

certain streaming services.

15) AC Mains Input and Power Switch

IEC 320 inlet for connection to an AC mains outlet. See the serial number label on the rear panel

of the unit for the specific voltage and frequency requirements.

16) Loudspeaker Outputs

The binding posts accept 5/16” (8.0mm) spade connectors, bare wire, or banana plugs.

17) Preamp Output

RCA jacks for connection to an external amplifier or powered subwoofer.

18) Balanced Analog Audio Inputs

XLR jacks for connection to balanced analog audio sources (8Vrms maximum input voltage). Pin

1 is ground, pin 2 is non-inverting (+), and pin 3 is inverting (-).

19) Single-Ended Analog Audio Inputs

RCA jacks for connection to single-ended analog audio sources (4Vrms maximum input voltage).

20) RS-232 Control Port

For connection to a home control system.

21) Baseband RC5 Input

For connection to a home control system or an IR extender. This input accepts a baseband RC5

remote control signal (3.3V LVCMOS levels, 5V tolerant) and can provide DC power (5VDC,

30ma) for an IR extender. The pinout of the 3.5mm plug is shown below. When the plug is

connected the front panel IR receiver is disabled.

22) 12VDC Trigger Input

For connection to a home control system or other component with a 12VDC trigger output to

switch the K-300i on (+12V) or off (0V). This input accepts a 3.5mm mono plug where the tip is

hot and the sleeve is ground.

23) 12VDC Trigger Output

For connection to another component with a 12VDC trigger input to turn it on (+12V) or off (0V).

This output accepts a 3.5mm mono plug where the tip is hot and the sleeve is ground. The

maximum output current is 60ma. The output will be high whenever the K-300i is on and low

when it is off.

Ground

+5VDC

Signal

K-300i Owner’s Reference

Remote Control

Remote Control Buttons have the same

function as the front panel controls, when

applicable.

Power

Use this button to switch the K-300i between

stand-by and operational modes.

Mute Button

Use this to mute the output. To un-mute,

press the mute button again.

3) Analog Input Buttons

Use these buttons to select analog inputs.

4) Digital Input Buttons

Use these buttons to select digital inputs.

Note: These buttons are only active when the

optional digital module is installed.

BAL (Balance) Buttons

Use these buttons to shift the balance to the

left or the right channel.

INFO Button

Pressing this button displays the IP address,

software version, temperature, and serial

number on the front panel display.

Volume Up/Down Buttons

Adjusts volume up and down with a range of

0-100.

DISP (Display) Button

Use this button to toggle the front panel

display off or on.

9) Playback Controls

Use these buttons to control the playback of

certain streaming sources. The search

buttons are currently inoperative.

10)

Informational Buttons

Use these buttons to display the

corresponding information on the front

panel display (only if the source contains

the appropriate meta-data).

11)

Menu and Navigation Buttons

Use these buttons to access and navigate

the front panel menu features.

Note:The remote comes with two AAA batteries

that have to be installed. Use the supplied Torx

screwdriver to remove the 4 Torx screws (T10)

securing the rear cover then install the batteries.

K-300i Owner’s Reference

Operating the K-300i

1. When the K-300i is in stand-by mode (“---“, on the display) - turn it on by pressing the Power

button on the front panel or the power key on the remote control. There are audible clicks and

“Initializing” will appear on the display. Once the display shows the source and audio format the K-300i is

ready to operate.

2. Check the volume level before playing the source since it will remain at the level it was last set at

when the unit was put in stand-by. The source will also retain its last selection. To select a new source

press one of the source keys on the remote control or press the Source button on the front panel to

enter the source selection menu.

Once in the source selection menu use the up or down arrow buttons to scroll to the desired

source. Press the Enter button to confirm the new source selection and exit the source selection

menu.

3. Start playing the source and adjust the volume level as desired, using the Volume buttons on

the front panel or the Volume keys on the remote.

4. To turn off the K-300i press the Power button on the front panel or the power key on the remote.

The unit will go into stand-by and, “---“, will appear on the display.

Front Panel Menu

The front panel menu contains setup and operational features to enhance the K-300i’s integration

into the audio system. It also has informational displays.

Menu Operation

Note: all menu functions can be accessed from the front panel buttons or the remote control keys.

Press the Menu button to access the front panel menu. Press the Menu button again to exit the

front panel menu. While in the menu use the Up or Down arrow buttons to scroll through the menu

items or selection choices. If nothing happens when pressing the Up or Down buttons, this means

that there are either no additional menu items available (as with some of the informational displays)

or you need to press the Enter button first in order to activate the selection choices.

In the case of a menu item that has selection choices (such as Theater Mode in the Source Setup

menu), press the Enter button to activate the selection mode (this will highlight the selection

choice). Use the Up or Down arrow buttons to change the selection choice then press the Enter

button to confirm the new selection (the highlight will disappear). You can now exit the menu by

pressing the Menu button or continue using the menu. If you press the Menu button to exit the

menu while the selection choice is still highlighted it will not take effect. This can be used to

disregard a menu choice made in error.

Pressing the Left arrow button will go back up to the previous level in the menu structure when

there is no selection choice or the selection choice is not highlighted.

The Right arrow button is used to move to the next character in a string of characters when editing a

multi-character entry (such as naming a source in the Assign Names sub-menu of the Source Setup

menu). When editing such a string the Left arrow button will move back to the previous

character.

K-300i Owner’s Reference

Menu Items

•Source Setup

oAssign Names

oLevel Trim

oTheater Mode

•Preamp Output

oLevel Trim

oOutput Mode

•Digital Filter

oFast Roll-Off Min Phase

oFast Roll-Off Lin Phase

•Network Setup

oIP Address

oSubnet Mask

oDefault Gateway

oMAC Address

oDNS Server

•Diagnostic Mode

•Software Version

•Software Update

•Display Brightness

•CEC Operation

•Serial Number

Source Setup

Assign Names – In this sub menu you can change the name of the source to better indicate the

actual device. Scroll to the source you want to change and press the Enter button, the first character

of the source name will be highlighted. Use the Up or Down arrow buttons to change the character.

Use the Right arrow button to advance to the next character and change it the same way. When

finished, press the Enter button to confirm the change.

Level Trim – In this sub menu you can add a volume offset to each source to compensate for

differences in their output levels. The adjustment range is +/- 10dB.

Theater Mode – When enabled for a particular source, theater mode fixes the volume at a level

equivalent to a standalone power amplifier. This allows the home theater surround sound processor

to control the volume of the left and right front speakers along with all of the other home theater

speakers.

Warning! - The Theater Mode should only be enabled for a source that has a volume

control. If it is enabled for a source with only a fixed line level output, very high volumes

may appear on the speaker outputs which could damage the speakers.

Preamp Output

Level Trim – In this menu you can add a volume offset to the preamp output to compensate for

gain differences between an external amplifier or subwoofer and the internal amplifier of the K-300i.

The adjustment range is +/- 10dB.

Output Mode – The two choices are Variable or Fixed. In Variable mode the output level varies

with the main volume control. In Fixed mode the output level is fixed to a standard line level output

for driving devices with their own volume control.

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