Hi MM
Thanks for the reply, unfortunately tired the lot already.
I'm definitely getting a signal from pre to power amp, green light flickering away.
I have found out that I have combi connectors on the cab but standard on the amp, that is probably why it worked with my other amp when it was a jack - jack cable used.
Doing a bit of digging I can see that a 4 pole speakon cable won't mate to a 2 pole connector,
If I have a 4 pole cable then that may be why nothing is passing through to the cab, will pick up a 2 pole cable and try again.
Unfortunately the are no distinguishing marks on the amp that denote the type of connector they are (maybe on the inside).
Cheers
Gui