Meridian Unplugged - Powered by MrTechGuy.co.uk Forums Thread Like Summary - Meridian 568 upgrade to 568.2mm

Hi all,

I was wondering/hoping somebody here can help me out.
We want to upgrade our Meridian 568 to a 568.2MM, I have contacted Chris from meridianlegacy.co.uk, and he told me he still had the parts available back then.
He told me back then through email, back in January and February that I was put on the list, but he was still looking for a transformer to complete the kit.

Anyway a little time later, there is no more response to my emails unfortunately. I'm still waiting for an answer on the current state.

I'm little afraid he perhaps is no longer in business, his website seems also offline/changed to new owner/domain.

Then I found this MrTechGuy New business acquisition blog.
Chris is no longer providing his service, Which is not good for me I think?
Going to MeridianLegacy now forwards me to MrTechGuy.

I have contacted MrTechGuy in the past, about the upgrade question two, and he contacted me back that these upgrade parts where no longer available.

Perhaps somebody else here knows another contact address to get these parts I hope?

I recently got my hands on an Meridian HD621 for 250 Euros, and was planning to use it with an upgraded 568, I hope this unit perhaps also works with our current 568?
As far as I can find, it is at and I hope I am correct on this one, I can at least connect the HD621 using connection like Coaxial to our 568 and it will simply passthrough DD and DTS bitstreams?
However, not having the 568.2MM will not give us the LPCM multi channel audio support, and upsampling.

I hope somebody here can help me out, thanks in advance.

Hi,
Firmware should be available from your local dealer or failing that I suggest you contact one of the HH friendly dealers that post on here.
I'll PM you their contact details, I'm sure someone will be able to help you.

You can install either version of the software, it is not dependent on what has previoulsly been loaded.

The important thing is once the firmware has been installed, to re_TYPE the unit to set the base level configuration ... and then of course configure from their to suit your requirements.

Regards,
Carl

Hi

I think there has been almost unanimous agreement that the 2.5b firmware sounds better than the 2.12. There's even better clarity and openness with 2.5b whilst still retaining the Meridian house sound of fluid, organic and natural musicality. I found 2.12 to be warmer and a touch less open, and that was with DSPs, so I can't comment on analogue system use.

One user recently posted his frustration that the 2.5b firmware sounds different with old Dolby ProLogic content, it seems that aspect was changed after 2.12. He reported that swapping back to 2.12 left the newer 2.5b processing in place for Prologic, so he couldn't get back to the sound he preferred. I think the 2.5b handles this content with Dolby ProLogic II processing, but I haven't needed that since VHS days and the occasional rare DVD that only had a stereo soundtrack. He had quite a specific use case, due to a large archive of Prologic material. I haven't read of any other user having an issue with the upgrade.

If you don't use Trifield, then no problem. The bug was that Trifield width was locked at a value of around 1.2 (my estimate) and it wouldn't change when you adjusted that parameter. IIRC, historically it could be adjusted from 0 (effectively mono, everything in the centre) to 1.5, a very wide sound stage wrapped around the rears to some extent. It was quite evident then that adjusting the width setting was having no effect. Later firmware across the processor range offered more subtle adjustment, from ~normal stereo to very wide and you could no longer shrink the image down to mono. It may be that the "locked" width setting actually suits your ears and room layout should you ever try it out.

Hope that's a help.

Cheers
George

I thought so too, I think the answer is perhaps within the DSPC influence on highres/apodizing sources topic, I'm not sure.

I've not read it thoroughly, but I think DSPC0044 file can also be used with 2.5b9, and gives another sound and perhaps also fixes the center width.
I don't know yet, but I will have to dive deeper into this..