Alternatively, if you want to use the 861v6, I believe it still has digital output ports and the digital comms output to connect it to legacy speakers using Meridian's comms cables and digital SPDIF (I seem to recall the speakers originally came with Van den Hul SPDIF cables):

Rear 861v6 panel

This is likely easier than making up your own or buying SpeakerLink to SPDIF and comms convertor cables. That said, you may need to source some replica comms cables as the originals are likely to be thin on the ground, if you don't already have them. Audio Images may be able to help here.

Prolific music listener / Hi-Fi addict!