Ok......I expected it to go up 2 months ago after I upgraded, but the bill doubled I have no understanding of the power consumption of my components, but I tend to put the cd player and pre-amp on standby......leaving both power amps on so they don't have to warm up when I put on a record/cd.....and I switch the mixer off. Should I turn everything off from the mains? What does everyone else do? Any tips to keep the costs down?