Hi Jafant,
I brought home an AQ Niagra power conditioner with an AQ Hurricane power cord. Ow! That hurt the wallet a bit. It was the price of a very good amplifier. Regardless, it is not going back to the store. The biggest improvement? The highs are now creamylicious. That's the best way to describe it. The Thiels really sing now. Even digital highs are so smooth and sweet. I know it is costly but I'm a believer now on what clean power can do. And this Niagra replaced a Furman Elite 15i. I thought the Furman was good.
Our Thiel speakers still have a lot to give us even decades later. Remarkable speakers.