KrellK-300i Integrated Stereo Amplifier is available in two versions: in thestandard Analog style or digital style with the optional digital streamingmodule for connecting to digital streaming sources.
The K-300iincorporates a newly developed amplifier circuit design with Krell iBias™technology, delivering 150 Watts/Channelinto 8Ω and 300Watts/Channel into 4Ω.iBias provides the sonic benefits of Class A operation without the excessiveheat and power consumption of traditional Class A design.
Packed withKrell’s latest technological advances, the K-300i achieves an extraordinarylevel of musicality. It’s elegant design is living room-friendly, whiledelivering more than enough power to achieve incredibly lifelike dynamics withany speaker.
The overallresult is an extremely linear and extended frequency response curve withsmooth, effortless highs and extremely dynamic bass energy.
With thedigital option installed the K-300i becomes a world class DAC with theconnectivity and features to support the latest digital music formats. An ESSSabre Pro DAC configured for high current output performs the digital to analogsignal conversion for uncompromised reproduction of digital music.
771VAtransformer with 80,000μFof capacitance forms a potent power supply for excellent signal control anddynamics. Krell Current Mode topology is employed with fully differentialcircuitry that runs from the input stage through to the last output gain stageproviding an extremely linear and extended frequency response curve withsmooth, effortless highs and extremely dynamic bass energy.
Thefront-panel menu system provides configuration features such as input trim.Theater Throughput mode lets the K-300i serve as the core of a surround-soundsystem without sacrificing two-channel sound quality. Analog Inputs includethree stereo RCA and two stereo balanced XLR. High-quality gold-plated speakercable terminals provide a secure, electrically ideal connection.
The K-300ialso offers features that make it perfect for custom installation, such asRS-232 and Ethernet ports for control and status feedback, 3.5mm jacks for IRinput, and 12-volt trigger input and output. Additionally, the unit has aninternal web server that is optimized for tablets and provides a remotegraphical user interface for convenient and intuitive control accessed throughits Ethernet connection.
A networkstreaming audio renderer with dedicated mobile App plays AAC, ALAC, AIFF, FLAC,WAV, WMA, and DoP files up to 192kHz/24-bit from UPnP music servers or NASdevices. The digital option with the mconnect Control app (available in iOS andAndroid versions) also provides Spotify*, vTuner Internet radio, Tidal*,Deezer*, and QoBuz* streaming services, is Roon Ready* and decodes MQA.
The K-300i includes MQA (Master Quality Authenticated)technology. MQA is an award-winning British technology that delivers the soundof the original master recording. The master MQA file is fully authenticatedand is small enough to stream or download. Visit mqa.co.uk for moreinformation.
HDMI 2.0 inputs and output supporting 4K UHD with HDR areavailable for TV viewing with audiophile grade sound quality. A single USB hostport is available on the front panel to play music from USB flash memory sticksand a USB device port is positioned on the rear panel for streaming musicdirectly from a computer. The digital option also includes a Bluetooth receiverfeaturing Qualcomm® aptX™ audio technology for the best sound quality whenconnected to aptX enabled Bluetooth devices.
*A subscription is required for these services. Updating thedigital module software may also be necessary depending on the vintage of theunit (see the download area at the bottom of the page).
**Krell highly recommends that users of the mconnect Controlapp update to the latest version of the app (v2.4.1 or higher for Apple devicesand v2.3.7 or higher for Android devices). This fixes a potential issue wheregetting a phone call while using the phone to play music to the DigitalVanguard or Vanguard DAC could result in a large increase in volume level. Keeping the mconnect Control app up-to-datealso ensures access to any new features and performance improvements.
AnalogInputs
2 pr.balanced via XLR connectors
3 pr.single-ended via RCA connectors
DigitalInputs
1 EIAJToslink Optical
1 S/PDIFCoax
2 HDMI(HDMI 2.0a, HDCP 2.2) + 1 HDMI Output
1 USB-A(USB 2.0 host)
1 USB-B(USB 2.0 audio device)
1 Bluetoothwith aptX
Outputs
1 pr.preamp outputs via RCA connectors
1 pr.speaker outputs via gold-plated binding posts
ControlInputs
1 RS-232input via 9-pin D-subminiature connector
1 remote IRdetector input via 3-conductor 3.5 mm connector
1 12 VDCtrigger input via 2-conductor 3.5 mm connector
Controloutput
1 12 VDCtrigger output (60 mA maximum current) via 2-conductor 3.5 mm connector
Inputimpedance
Balanced:16 kΩ
Single-ended:8 kΩ
Frequencyresponse
20 Hz to 20kHz +0, -0.22 dB
<10Hz to100kHz +0, -0.57 dB
Signal-to-noiseratio
>104 dB,wideband, unweighted, at 2V RMS in balanced, referred to full power output
>117 dB,"A”-weighted
Gain
25 dB,referenced to 2V RMS in balanced and full power output
InputOverload
10.4 V RMSBalanced
6.8 V RMSSingle-ended
Totalharmonic distortion
<0.015%,1 kHz, 150 W, 8 Ω load
<0.08%,20 kHz, 150 W, 8 Ω load
Outputpower
150 W RMSper channel at 8 Ω
300 W RMSper channel at 4 Ω
Outputvoltage
98 V peakto peak
34.6 V RMS
Slew rate
46 V/µs
Outputimpedance
<0.023Ω, 20 Hz
<0.035Ω, 20 Hz to 20 kHz
Dampingfactor
>347, 20Hz, referred to 8 Ω
>228, 20Hz to 20 kHz, referred to 8 Ω
Powerconsumption
Standby: 11W
Idle: 46 W
Maximum:900 W
Heat output
Standby: 37BTU/hr
Idle: 156BTU/hr
Maximum:3060 BTU/hr
Dimensions
17.25 in Wx 4.12 in H x 18.00 in D
438 mm W x105 mm H x 457 mm D
Weight
Unit only:52 lb [23.6 kg]
As shipped:60 lb [27.3 kg]
DigitalModule Specs
Coaxial andHDMI inputs support PCM up to 24-bit/192kHz.
Opticalinput up to 24-bit/96kHz
HDMI inputssupport DSD and 4K video content.
HDMI outputsupports Audio Return Channel (ARC)
USB andNetwork streaming support MP3, AAC, WMA, WAV(PCM), FLAC, ALAC up to 192kHz
Bluetoothstreaming supports A2DP, AVRCP, HFP, HSP
