Should I leave my equipment on ?

pre-amps should stay on all the time they draw very little power.when it comes to amps though if there is no stand-by the bill at the end of the month can be excessive.leaving my three bryston amps on all day as well as two mark levinson amps cost about 200 can dollars a month.i use the bryston's for home theatre and the levinson's for audio.the bryston's being turned off did not make any difference to the movies.the levinson's have a standby switch which just keeps the amps warm,it sounds great and the electric bill is a lot cheaper.hard to believe but i monitered this over an eight month period.good luck

Side note... If you have the Cambridge CD players with the IEC power socket, then upgrade your power cord if you've not already done so. Makes a big difference. For $80 I'd recommend the Blue Circle BC61.

What is an IEC power socket ? I'm not familiar with this equipment.