Sabai, Why would you try power conditioner in series? That is like saying that a drug you use is working so you should take twice as much. I have three conditioners I am considering presently. None are those you are considering. Each has to be done and compared, although this makes for a long term A/B comparison, given that you have to change all the wires into each and then await their recovery from being unplugged and for the components to warm up. Also each needs to be compared with just plugging into the wall. As I have 11 things to plug in, this is a cumbersome assessment.