Thanks for the help so far, even though I still cannot wire as "home run".

I verified I only have one controller; I have the 5200s/5200HC set to no controller, the G61RSL set to controller and the 598 auto's to non-controller. Unfortunately this hasn't changed the result.

Can anyone explain the signalling between master and slave comms?

I read there is a separate connection for master and slave in the SL socket. Does the control signal get sent to the master, which then relays to all slaves? If so, how can a 3200 (which has no master/slave switch) know it should answer as a master or slave?

If the 3200 is dumb and responds to either comms, then it must be up to the G61RSL to prevent the master comms to be sent to the slave. The Meridian config allows the master to be specified; when I change it I cannot see a change in the system behaviour.

Andy

G61RSL, 598, DSP5200SL, DSP5200HC, DSW