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Foundation 4K

Ultra HD Processor

The Foundation 4K UHD Surround Sound Processor couples
award winning Krell preamplifier circuitry to the latest in HDMI technology
to create the centerpiece of a high performance home theater system. The
Foundation 4K UHD adds HDMI 2.0 and HDCP 2.2 technology to the
award winning Foundation processor. Designed to be upgradeable, existing
Foundation processors can be upgraded to the Foundation 4K UHD platform
at the Krell facility. The Foundation 4K UHD updates 4 of the 10 HDMI
1.4a inputs to HDMI 2.0/HDCP 2.2 capability. New on screen display
functionality adds status messages including volume, active source,
video resolution and audio format. System setup is accomplished from the
front panel or a network tablet/computer.

 

Additional functionality has been added to the second HDMI
output. The two HDMI video outputs are now independent and
can be configured to send different video signals to two
individual displays. Both outputs support 4K signals being
simultaneously displayed.

 

Both HMDI outputs feature Audio Return Channel (ARC). With
ARC, a display device is able to send audio back down the
HDMI cable to the Foundation 4K UHD. Televisions with
built-in web streaming capability like Netflix or Pandora,
can send the audio signal back to the Foundation 4K UHD use
the full home theater system instead of just the TV's
speakers.

 

Featuring the latest digital connectivity, the Foundation 4K
UHD maintains Krell's exacting standards for analog audio
reproduction.

 

From decoding the latest lossless audio formats, extensive
digital switching, 3DTV pass-through, and more, the
Foundation 4K UHD is fully compliant with the digital age.
The 7.1-channel processor also features balanced audio
outputs, automatic setup and room EQ, and Krell's legendary
robust hardware. A slim form factor exudes the Krell
aesthetic, while allowing placement in smaller equipment
racks.

 

The Foundation 4K UHD features Krell's Automatic Room
Equalization System (ARES), to ensure the best possible
performance from every theater. ARES analyzes all the
speakers in the system, their location, phase, and distance
from each other, to determine the best crossover frequency,
delay, and more. In addition, ARES incorporates the
acoustics of the room to determine unique EQ curves for each
of the 7.1 output channels. Unlike other room EQs, ARES can
be programmed to only adjust the troublesome low
frequencies, leaving high frequencies unaltered.

 

The Foundation 4K UHD includes a new Krell development -
Intelligent HDMI switching. Intelligent HDMI switching is a
combination of circuitry and innovative software that
optimizes HDMI operation. Various parameters including the
monitor's electronic ID and source video resolution are
stored in non-volatile memory. All 10 source inputs are
always active so source, channel, video resolution, and
audio format changes are instantaneous. The Intelligent HDMI
design provides the fastest signal recognition possible.

 

The Foundation 4K UHD passes video signals directly without
any video processing, ensuring bit-for-bit accuracy of the
signal, up to 3840x2160. However, to simplify cabling,
setup, and use, there is full transcoding of the 2 composite
and 3 component analog video inputs to the HDMI outputs.

 

Krell designed the Foundation 4K UHD with flexibility and
ease-of-use in mind, with extensive routing capability of
the audio inputs to the various outputs. During setup, the
specific paths will be chosen based on how the user intends
to use each source, displays, and audio output channels.

 

The Foundation 4K UHD supports stereo and multichannel DSD
decoding via any of the 10 HDMI inputs. Playback options
include DSD 2-ch Direct, DSD Stereo, and DSD Multi modes.
DSD 2-ch Direct converts a stereo DSD signal to analog and
directly passes it to the left and right analog outputs. DSD
Stereo first applies any left and right channel crossover
configured in the Foundation 4K UHD menu, converts the
signal to analog, and then sends it to the left and right
outputs. DSD Multi supports multichannel DSD recordings and
utilizes all crossovers configured in the Foundation 4K UHD
menu. There is no configuration required as the Foundation
4K UHD automatically recognizes a DSD signal and defaults to
the last used DSD mode for playback. Pressing the mode
button on the remote control or web server interface will
cycle through all three DSD modes.

 

The Foundation 4K UHD will allow owners to take full
advantage of the best audio soundtracks available, with
decoding of Dolby Digital, Digital Plus, Dolby TrueHD, DTS,
DTS-ES Discrete, Matrix, and DTS-HD Master Audio. In
addition, a full suite of post-processing modes are
included, including Dolby Pro Logic IIx and DTS Neo 6.
Krell's proprietary surround modes, Party, General
Admission, Front Row, and On Stage, offer a different way to
listen to favorite tracks.

 

The Foundation 4K UHD also offers features that make it
perfect for custom installation, such as 3.5mm jacks for IR
input and 12-volt trigger input and output, as well as RC-5
and optional rack-mount ears. Additionally, the unit can be
controlled with home automation systems via RS-232 or the
Krell web server through its Ethernet connection.

 

The Foundation also offers features that make it perfect for custom
installation, such as 3.5mm jacks for IR input and 12-volt trigger input and
output, as well as RC-5 and optional rack-mount ears. Additionally, the unit
can be controlled with home automation systems via RS-232 or the Krell web
server through its Ethernet connection.

 

THEATER 7

7 Channel Power Amplifier

100 Watt Amplifier Featuring Krell iBias Technology

The Theater 7 Amp uses iBias technology to maintain Class A operation up to 100 watts into 8 ohms for the left,
right, and center channels and up to 50 watts for the four surround channels. This provides the critical front
channels with high bias current to produce that lush, open Class A sound while also minimizing the heat output
and power consumption of the whole amplifier.

The amplifier design uses Krell Current Mode technology that is fully differential and discrete in the critical gain
stages. This results in a highly linear and extended frequency response, well beyond the range of hearing, for
smooth effortless highs and tight high impact bass.

The power supply consists of two 700VA toroidal transformers and 160,000uF of capacitance. This is shared
among all the channels so all of that power is available to the channels with the most demand.

 

 

In real world conditions the left, right, and center channels require the lion’s share of the power so this gives the
Theater 7 a more effective power supply than other amplifiers that have smaller dedicated power supplies for
each channel.

Frequency response

20 Hz to 20 kHz +0, –0.11 dB

<3 Hz to 200 kHz +0, –3 dB

Signal-to-noise ratio

>101 dB, wideband, unweighted, referred to full power output

>114 dB, “A”-weighted

Gain

25.5 dB

Total harmonic distortion

<0.02% at 1 kHz, at 100 W, 8 Ω, two channels driven;

<0.20% at 20 kHz, at 100 W, 8 Ω, two channels driven;

Input impedance

Single-ended: 27 kΩ;

Balanced: 54 kΩ;

Input sensitivity

Single-ended or balanced: 1.50 V RMS

Output power, per channel

120W RMS at 8 Ω, 2 channels driven

115W RMS at 8 Ω, 3 channels driven

110W RMS at 8 Ω, 5 channels driven

105W RMS at 8 Ω, 7 channels driven

210W RMS at 4 Ω, 2 channels driven

190W RMS at 4 Ω, 3 channels driven

165W RMS at 4 Ω, 5 channels driven

140W RMS at 4 Ω, 7 channels driven

Output voltage

93 V peak-to-peak

33 V RMS

Output current

10 A peak

Output impedance

<0.025 Ω, 20 Hz to 20 kHz

Damping factor

>320, 20 Hz to 20 kHz, referred to 8 Ω

Power consumption

Standby: 1 W

Idle: 66 W

Maximum: 2000 W

Heat output

Standby: 3.42 BTU/hr.

Idle: 225 BTU/hr.

Maximum: 2200 BTU/hr.

Inputs

7 single-ended via RCA connector

7 balanced via XLR connector

Outputs

7 pairs five-way binding posts

Remote connectors

One 12 VDC input (12 V trigger) via 3.5 mm jack

 

Dimensions

17.1 in. W x 7.65 in. H x 21.10 in. D

434 mm W x 194 mm H x 536 mm D

Weight

80 lbs., 36.4 kg (shipping)

70 lbs., 31.8 kg (unit only)