Found this thread on the UK forum. Any validity to this claim? "I have to say that this need for a power conditioner REALLY bothers me! Do you realise why the power conditioner 'fixes' the problem? Because it doesn't have enough current capacity for the amp, so the current flow is choked at the power conditioner. I agree with Ken, Aguilar should really get some stick for this. This way that power conditioners choke the mains supply is exactly why they should never be used for high power amps!"