Meridian Unplugged - Powered by MrTechGuy.co.uk Forums Discussion Meridian - Systems Meridian 568.2 ~ No stereo

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MHR is an encrypted Meridian protocol which provides copy protection but also has the benefit of apparently improving sound quality by decorrelating jitter from audio. Most modern Meridian components support MHR either by decoding it, such as in speakers and digital inputs, or encrypting it, as in sources or processors. Meridian use to encrypt all high resolution output with MHR but I think that may have changed now.

The .mm as in the 568.2mm refers to multi channel MHR Smartlink, a method of bridging multiple digital inputs to allow discreet multi channel input up to 6 discreet channels. The 'smart' also refers to the fact that additional meta data is incorporated to allow the source to tell down stream devices what type of audio is being transmitted - music, movies, 5.1 etc.

On the 568.2mm, the Smartlink interface was via a VGA style connector (top left of rear of unit) due to space constraints of otherwise needing 3x digital coax inputs. Otherwise MHR Smartlink is simply bridging 3 standard digital inputs which are typically configured in setup to run in multi channel mode. In UK, the .mm upgrade was �400 and could only be fitted to a 568.2.

The multi channel link does not have to be MHR encrypted and may be standard PCM.

On the flagship 861v6 processor, MMHR is available allowing 8 channels of discreet input to support 7.1 discreet audio. The only device currently that offers MMHR output is the HD621 HDMI to MHR/MMHR processor.

MMHR is currently not supported on G series, limiting this range to 6 channels of discreet digital audio.