Which amp will cause a larger increase in electric bill?

I don't believe those are close to current Class A amps and they probably do draw a lot of current on idle.  They are the least efficient of all amps.  I had an Odyssey Stratos extreme class AB amp for 5 years which cost about 30.00 a month to run as they are designed to be on all the time.  My electric bill went down that amount after selling it and going with something else.