by utter rubb I mesn an nominal voltage of 215-220 with outages of 20% or more. I tried a voltage stabiliser to start with but all this did was to show how much the mains was jumping. I suppose a ups might be one way forward but I favour a battery driven system as in theory i can have a cleaner supply all of my playing times. I have asked shunyata etc and whilst they can take out spikes brown outs are a different matter .