Unsurprisingly, Mr. Meridian, you are correct. The cables are to blame. Well actually, they are really not to blame - I think they are just the wrong ones for the purpose I was using them for. The cable I received with the speakers was a 180 to 180 din + phono interconnect. I now realise that this cable only seems to work from a master to slave connection. That is why this cable worked when I was plugging the digital source directly into the master speaker and playing in stereo.

Unfortunately, one thing I forgot to mention is that I am running a mish-mash of cables until mine are being made up with custom BNC terminals. Thanks to Michael, I was able to get the essential 240 (from 568.2) to 180 comms DIN to the center, the interconnect being separate. The comms from this point onwards has been via (please forgive me!) radioshack MIDI 180 DIN cables. These seem to perform the slave to slave function. I could not use these to connect to the speaker pairs due to them being too short. This is why I was initially using the original comms+phono cable that came with the speaker pair.

As a test, I ran this original cable from the 511 patch box to the slave speaker (again a pseudo master to slave connection) and connected the speaker pair using the short MIDI cable. This worked! A true "aha" moment.

My thanks to you, Mr Meridian, Carl, dpstjp and the many others who PM'd to help me sort this out!

Last edited by B2nvs2001; 2012-09-13 12:40.
DSP33