At the risk of being nit-picky, maybe. To be nauseatingly accurate, if the PC uses an isolation transformer the input ground (house/utility) must be totally isolated from the output ground (iso transformer). Grounding needs to be at the source of the power, and in the case of an iso transformer, is the iso transformer secondary side (this is a separately derived power source per NFPA 70 (the National Electric Code). The primary side grounds back to the house/utility and the two must be separate for effective noise isolation, and I believe safety.   This is also true of double conversion UPS's   Not interested in an argument or long technical discussion, but this is the correct situation.   Other than noise from digital sources (high frequency pulses switching between 1's and 0's), other noise comes from a voltage difference between the ground and neutral (the infamous ground loop). This voltage must always be zero or noise could result. Just about any source of noise that can occur in audio systems that I can think of is a result of a voltage difference between the two.

Ok thanks. It appears in order to see the ingredients, need to request from manufacturer. Site says its a vegetable oil...

On relatively inexpensive power conditioners it is probably illegal for them to isolate the safety ground connection. And it SHOULD NOT be done. If you have a noise problem figure out where and between which pieces of equipment and fix that interconnect/interface. https://indianaaes.org/wp-content/uploads/2012/09/indy-aes-2012-seminar-w-notes-v1-0.pdf review the document at this link..you will then know as much as the greatest minds on noise know.

Thanks for all the feedback, especially @Dave1291, I don't have a compelling reason to unload them, and you've encouraged me to try to make room for them. They are beautiful! I know the pics don't accurately represent their appearance, but the original owner did an awesome job on the finish. I have read posts where some state to keep the speakers completely original, and others are passionate about replacing the caps, etc. for the best sound. I would be interested in the best sound over keeping the original state, but certainly don't want to lose the Klipsch signature pure sound. What would be recommendations for upgrades to these all original speakers?

Here is a description of that oil in German, just use google translator.   https://bormawachs.com/dettaglio_new.php?idprod=NAT4978XX&cat1=2&lang=3

Blah, picked one up at auction someone had w/a system.  Basically a heavy duty power switch me thinks.  Listed at a k and I paid 200 for it.  It is what it is.  Tons of hype but does that floor really drop?     Only floor I ever saw drop was while standing up against the wall riding a spinning ride at an amusement part.  Yea, ok, more rocket science. 

Very nice, thank you! Don't know if that brand is sold in the US and I can't read Italian, but what are the ingredients of this oil? What is straw oil?

I agree with the suggestion about addressing your room. Big improvements to be had there for sure.    If streaming is your only source, you can reap huge benefits here by upgrading to a dedicated streamer and improving your DAC. 

This isn't necessarily true, if power conditioners have isolation transformers with Faraday shields. The output of the isolation transformers is completely isolated from the source power, including the grounds. The output is a new source of power derived from your power source and isolated. Same if the power conditioner is a double conversion UPS system   Noise can also originate when there is a voltage difference between the ground and neutral wires (they are tied together at your electrical panel so the voltage difference should be zero). Noise can also originate from TV cables that are tied in some way to your audio system, and digital sources within your system (CD's, NAP's, etc.) if they share power with your amplifiers and analog audio equipment.   Noise is a complex subject that takes books to explain. Unless you can hear noise on your audio system you don't need any of these. If you have noise, investigate and find the source, then investigate ways to mitigate.   If you have voltage swings so great that your system cannot handle it, you have big problems in your house way beyond your audio system, or you have absolute junk equipment.   If you are worried about voltage spikes, isolation transformers and SPD's will protect your system. (forget about power strip protection, they are useless). 

This album, but also all the others, for male voice and excellent recordings...