"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).
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).