Meridian Unplugged - Powered by MrTechGuy.co.uk Forums Discussion Meridian - Systems 176.4/192kHz Input to DSP-8000 problem

I recently modded my player with SPDIF board from Audiopraise so that I can enjoy high resolution PCM output for my SACD / DVD-A Collections.

However I have to limit the output to 96kHz otherwise the DSP-8ks cannot lock the signal via SPDIF.

I found DSP-8ks spec said:


Inputs: Two digital inputs to SPDIF standard; 32kHz-96kHz sampling rates at up to 24 bit; MHR support. (A future software update will enable support for 192kHz.)


So I did call Meridian UK around early Jan 2008 enquirer about the hi-res PCM input. The tech guy said in confident that the 8ks can accept 192kHz PCM via coaxial SPDIF.

I forgot to ask about the 172kHz, but if 192kHz is supported, so should 172kHz?

My 8ks was delivered about late Oct 2007 and I haven't bought a com cable to check it's firmware version.

Anyone here has successfully feeding 172/192kHz PCM (Not MHR) to the 8ks?

Thanks,

I didn't think this was physically possible with SPDIF from a bandwidth perspective.

I think SPDIF can physically transport 2ch@192/24.

Almost all the DSP speakers have had this note on them since 24/96 existed. Including the DSP8000's.

Inputs: Two digital inputs to SPDIF standard; 32kHz-96kHz sampling rates at up to 24 bit; MHR support. (A future software update will enable support for 192kHz.)

Interesting enough DSP8000, 7000, 6000, 5500, 5000 states about future support of 192kHz.

Only DSP5200, 3100 were left out. Makes me wonder if they are "hardware" inferior to other siblings.. This is a bit out of topic.

172/192kHz over SPDIF is not official standard, but SPDIF COAXIAL DO support this. TacT's processor can do 192kHz over coaxial (but not optical SPDIF, optical is limited to 96kHz)

My 5200 does not accept 172kHz signal as well. The screen will just keep on flashing.

Since 8000 states it will support 192kHz in future software, though the web page haven't been updated for a long time, just wonder if anyone have successful experience with 192kHz signal. It might be the speaker can support 192kHz, but not 172kHz ? Unfortunately I don't have 192kHz DVD-A...

I believe there are quite a few users on this forum also have modded player from DVDUpgrades This board also output SACD at 88/172kHz.

Hearing SACD though 88kHz is already a wonderful experience and I just cannot imaging when it's working at 172kHz...

I recently (just before Xmas) had my 8000s back at the factory for conversion and upgrades, and asked the same question to the service department, wishing to make the necessary changes if they were available. I cannot remember the exact answer, but it was something along the lines that they had no information about this and to the best of their knowledge no special cabling was available from M.

So have you tried feeding the 8ks with hi-res PCM ?

I doubt there can be any special cabling.. The Master speaker have only 1 SPDIF out to slave speaker.. Nothing can be changed here.

yes but technically it is not desirable

Truth is, no I have not tried to feed the 8000s with a 24/192 signal. In fact, I am not aware of any records with such signals, and even if I did find any I am not sure whether the equipment I have will provide such a signal.
Perhaps I was totally mistaken, but I thought that the special cabling required was internal to the 8000s and not external - hence the request to Meridian to carry out the upgrade if available.

c7775, thanks for the sharing of this mail. It's clear that 176/192 over single wire is not a standard.

But Meridian only have 1 SPDIF input and their spec saying future support (of 192kHz) is available. Which means they are going the non-standard way. I'm just here to ask if anyone knows this feature is "enabled" or still in future roadmap?