Power Conditioners


Not sure if I placed it in the correct topic but here goes. I was just wondering how power conditioners work, as I want to buy one. There are conditioners with only filtered inputs and conditioners with some filtered inputs and some unfiltered. I believe the unfiltered ones are for analogue devices. But why should these go into the unfiltered part? If I buy a power conditioner for example with only filtered inputs, will I not be able to put my class A amp in? Or will it have a negative effect?
sjeesjie
Never have had that problem with or without a conditioner. Only way you'll know is trying one in your environment
"I was wondering if there are power conditioners that can solve the spikes you hear over the speakers when you switch on or off the lights?"

A series-mode surge suppressor should take care of that very nicely. In my case, I would hear a thump from the speakers whenever the ceiling fan in the room was turned off.

Zero Surge and Brick Wall offer units that are inexpensive ($250-$300). Audioquest also offers the Niagra 1200 but it's considerably more expensive ($1,000).  
Post removed 
Post removed