Meridian Unplugged - Powered by MrTechGuy.co.uk Forums Discussion Meridian - Systems SpeakerLink used as Digital Out (XLR or SPDIF) plus COMMS and RS232

Hi Frans,

That would work just fine.

Regards,
Carl

Thanks Carl,

Does someone know a good address for making this cable?
Of course in the best quality

Frans

Hitchhiker MI' on this forum, he is the man!

Russ

Hi Steve,
I've been looking at the diagram for AES to SPDIF, and as far as I can make out, the AES- feed is simply loaded to ground. Only the AES+ is utilised for the SPDIF signal, is that right? If so there is no benefit from having a balanced AES signal in the first place - or have I missed something?
Cheers, Trevor

Hi Trevor,

Your observations are correct.

The use case you missed is when a given device only has a SpeakerLink output and needs to be connected to a SPDIF input i.e. there is no choice.

Regards,
Carl

Another option would be to use the wiring as below:

SpeakerLink to AES/EBU without Comms


Along with a XLR to RCA transformer at the endpoint.
This would keep the balanced benefits.

All the best,

Steve.

Given these cables can connect SL and legacy equipment what is the point of an AC12 when you could just have a conversion cable ? Or does the AC12 do something else ?

Piece of mind knowing it's all Meridian, as for functionally very little. Though if you want galvanic isolation, one needs to use a XLR to RCA transformer at the endpoint or just use Robert.W's Reviver
which has them built in.

Regards,
Carl

AFAIK, Robert's Revivers do not use impedance-matching for balanced XLR to single ended RCA conversion. Do they use a resistor network or something else?

VK,

My Reviver is USING A BALANCE TRANSFORMER!

Why do think it's a simple resistor network?

The circuits and craftsmanship of the Reviver is professional
and optimized for best sound quality.

We tested 15 different transformers before the final decision was made to get the best sound and of course fulfill the technical specification.
Also other little parts are built in for best performance.

The Reviver IS NOT A SIMPLE CABLE SOLUTION.

There are reasons why it's more expensive than a cable solution but still far away from the Mothership solution. The price is very acceptable for that what you get in terms of sound and quality of craftsmanship and technical specification.

Robert,
I am on vacation right now till the 28th of March and can only reply when I have time and access to the internet-sorry.

Hi Robert, I'm happy to stand corrected...

Quick thanks to Steve for these diagrams. From these and a great design from Duncs, I have made a (working!) SpeakerLink to SPDIF + two-way (C-lead) comms adapter (pic to follow).

Note, you can use a Lundahl impedance matching transformer to do the AES to SPDIF conversion. Not cheap (£18 + shipping from Canford), but no other options at the moment.

Wire as follows: connect the AES+ (pin 7) and AES- (pin 8) to the 110 Ohm side of the transformer ground is not connected) and the +ve (centre wire) and ground (screen) of the SPDIF coax cable to the 75 Ohm side of the transformer.