Krell Foundation 4K
Krell Foundation 4K audio video preamplifier, 7.1-channel processor with extensive HDMI connectivity and balanced outputs, for a high-end home cinema system.
Description
The Foundation 4K is an audio video preamplifier from Krell, designed as the central processor of a home cinema installation. It handles audio reproduction across 7.1 channels while managing the decoding and switching of video sources, with particular attention paid to the quality of analogue reproduction, in keeping with the brand's usual standards.
The chassis adopts a slimmer format than previous generations of Krell processors, making it easier to integrate into smaller equipment racks without sacrificing the brand's distinctive aesthetic. In terms of connectivity, the unit offers 10 HDMI inputs and 2 HDMI outputs, each fitted with Audio Return Channel (ARC) functionality: a television equipped with built-in streaming services can therefore send its audio stream back to the processor via the HDMI cable, allowing streaming sound to be played through the whole home cinema system rather than through the television's own speakers alone. The unit also features balanced audio outputs and an automatic set-up function with room equalisation.
This preamplifier is aimed at demanding home cinema installations, where the user wishes to centralise numerous HDMI sources, make use of ARC audio return from a connected television, and benefit from automatic calibration suited to the acoustics of the listening room.
What to check before buying used
On a multichannel AV processor of this generation, the HDMI connectivity board and video switching circuit are the first points to check: test each input and both outputs, including the ARC function, to rule out any faulty ports. Also check that the automatic set-up and room equalisation work correctly, as well as the firmware version, which is often in need of updating on this type of unit to ensure compatibility with recent sources. A check of the balanced outputs and the control screen or front display, if fitted, completes the inspection.
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