The UDP411 uses a very simple, almost direct video path from the disc or network video with upscaling of all video sources up to 4k to its ultra-high precision outputs. This short path approach allows pictures to be presented without unintentional artefacts and delivers the kind of pristine picture quality that will truly captivate any viewer. Using broadcast quality digital video clocks during processing means the resulting picture quality is simply stunning.

To ensure the UDP411’s music performance meets the same “reference” standards the class leading TI/Burr Brown PCM1794 digital to analogue converter (DAC) is used. This device, coupled with a linear phase Bessel output filter and high precision re-clocking system results in audio quality comparable to a dedicated audiophile CD player. Even the UDP411’s power supply has been specially designed for outright performance. Discreet sub-regulated power supplies on the drive, audio and DAC boards deliver significant benefits to the overall performance of each element and thus allow each section to work truly independently and without interference.

The problem is that 4K means something different whether you're talking about a TV in your home, or a projector in a theater.

Technically, "4K" means a horizontal resolution of 4,096 pixels. This is the resolution set forth by the Digital Cinema Initiatives. Because movies vary in aspect ratio, which refers to the exact shape of the rectangle of screen, no vertical resolution is specified.

So yes, the pedants are correct. Ultra HD TVs aren't technically "4K" since their resolution is 3,840x2,160. However, it doesn't matter. 4K is way easier to say than 2,160p or Ultra HD, and when anyone runs a survey asking about it, the vast majority of you (and us, FWIW), greatly prefer "4K." So does Google. Amazon just uses both.

Since the pixel difference is 13 percent and it's nearly impossible to see even larger differences.