Meridian Unplugged - Powered by MrTechGuy.co.uk Forums Discussion Meridian - Systems HD621 BNC Comms

I had a play with MConfig when I got home and under no combination I tried can I get a comms link to appear between the HD621 and Master speaker.

The other thing, which Carl has touched on, is that I noticed the Comms on the HD621 is an input, and, in legacy comms at least, this is a C5 connection, which would be to another Meridian controller or source component, not to a DSP speaker.

I’m starting to doubt whether this is possible… Does anyone actually have this working?

O/P - have you considered getting a Meridian processor, if funds allow? Something like a 568.2mm is a phenomenal processor and would add so much functionality to your system (and allow you to use your centre DSP for Trifield, and movies, for example) for not too much money these days. If money is tight, I understand, it would just be a great addition to your setup and solve this problem instantly, also.

Hi,

I don’t know if it’s any help, but the UHD722 comes with a Din Comms to SL comms adapter, so I wonder if you could go from the slave speaker SL out back to the din comms on the HD621.

Just a thought

Brian

I can confirm that my DSP7200s work with an HD621. Selecting an active source will switch the HD621 to the correct input.

The left speaker is set to Master and Controller.

The HD621 is connected for comms using a BNC to BNC cable to the BNC comms input (and yes I do mean input*) on the left speaker.

The left speaker is connected to the right speaker using Speakerlink.

BUT I have not got it working for sound (yet) because of laptop issues. So it is still on an old 6-channel config.

The config is (relevant settings only) as follows:

Setup
- System Address = 1
Audio (down column)
- Smartlink/MMHR, Smartlink, 6 Ch, Yes, Yes, Yes, Yes, Yes
Types
- unknown (see my previous posts above) - but probably = 0
Connections
- C = Meridian Comms Input


* Just physically/visually checked as I realised I had taken out a G68 (which had been the Controller)

I wonder if you having had a processor in the MConfig setup somehow configure the HD621 so that the HD621 expects comms input?

O/P, try inserting a surround controller in MConfig between the HD621 and the DSPs, that should visually give you a comms connection via the controller to the DSPs. Store that to the HD621 without removing the surround controller in MConfig.

If this gets comms working, you could then try setting the HD621 to 2-channel.

If that doesn’t work, perhaps the devil is in the detail of Gianni’s config in the DSPs themselves?

The last possibility is that your HD621 comms board is broken in some fashion…

I'll try that when I get home. It seems that only @Gianni can confirm it could be done. Thank you guys for trying.

It seems like a good idea but I haven't found such an adapter on the internet.

To be really clear...

The BNC cable for comms goes from the HD621 to the Master speaker comms BNC INPUT.

This is the opposite of what one might expect (and entirely serendipitous in this context) as the Master speaker is the source of the comms, so one might expect to connect the comms cable to the BNC comms output.

That would make sense as the Input would be Master comms, whilst the output of the speaker would be Slave comms (there is a slight difference!)

The input has to be two-way (i.e. to/from the DSP speaker) as they can send remote commands back to the processor (or in this case the HD621).

All inter-source communications must be using Master comms and it is only once it gets to a DSP speaker that it becomes Slave comms.

As an aside, I've always had problems getting a D1500 to work without any other DSP speakers in the system as there is nothing to give it a slave signal.

Sounds like we have a working solution...

Cheers,

Steve

It might be helpful to others if a block diagram of a working system configuration could be created and uploaded to Duncan's Meridian info page. This and other non standard configuration diagrams could prove to be a beneficial addition.

Hi,

Duncan's Info site is no longer accessible, so I am told, in order to upload files.

Happy Christmas

In that case, maybe on the Wiki (if that is accessible) or a sticky for such things on the forum?

That would be a shame, what would it take for someone to take that over in order to keep it up to date?