Will an Isolation Transformer Help My Digital?

Lowrider57,
If the Tripp Lite IS250HG Isolation Transformer purchased from Amazon didn’t work I’m guessing you could return it for a refund.
Personally, I don’t think it will clear up your problem, but I could be wrong. There are others on Audiogon (jea48, almarg to name a few) that are much more knowledgeable than myself when it come to this type of issue.
If I remember correctly, aren’t you using a Blue Circle PLCX0e?
As I stated in your other post the PLCX0e works remarkably well in removing AC grit nastiest.
I also wonder if the problem could be DC on the line?

Lowrider57,
Short answer, yes a good Isolation transformer can help front end components sound better.
This would also help IMO with or without an isolation transformer: https://forum.audiogon.com/discussions/has-anyone-tried-these-stunning-new-cpt-power-cord

This is a bit long, but worth reading: My power filtration for my entire systems is provided by two Extreme Isolation Transformers (5 KVA each). The power goes from my main circuit breaker panel into the Xentek Extreme Isolation Transformers and then into a sub-panel that feeds all eight dedicated AC outlets into my audio systems. The Extreme Isolation transformers have a huge iron core design, noise suppression is -146 and they weigh 129 lbs. each. The isolation transformers actually sit on three 1-1/2" solid brass audio points that are on top of the cinder blocks and the cinder blocks rest on top of three hockey pucks that are on the concrete floor. I hear greatly improved musical response in all areas with no major side effects other than the production of some hum, slight heat and of course any isolation transformer is going to consume additional electricity. The hum and slight heat is not a problem for me since the transformers are located in a different room in the basement. I also think different brands of isolation transformers produce different results and most likely are somewhat system dependent. What works well for one audiophile might not produce the same results for another. The beauty of my power filtration system is I purchased the transformers used and did all of the labor myself. The total cost was well under $1000 (for the used transformers, running 8 dedicated lines and circuit breakers, etc., high end outlets not included). With that said, I improved the sound recently in my secondary system when I attached a CPT 300 power cord to my PLCX0e6 (in my secondary system) and powered my Transport, Dac, and FM tuner and the sound of my front end components were once again improved. See: https://forum.audiogon.com/discussions/has-anyone-tried-these-stunning-new-cpt-power-cord (same link as above).

Whart, you ask a great question which I'm not qualified to answer.
I'd love to own the Equi=Tech 10 KVA :-)!
I still own an Equi=Tech Q2.
Check out http://www.corepowertechnologies.com
You could always send an email to Mark at that site or ask that question on the CPT discussion forum here on Audiogon, or phone him. When he sees your question he will answer. It's my understanding that somehow it's balanced power, but that's the limit of my knowledge. LOL!

Lowrider57,
No, all your equipment doesn't need to have a CPT power cord.
I have not done a good job of updating my two systems on Audiogon, sorry about that, I'll have to soon. Anyway, in my second system I have a CT GE high current power cord on my integrated amp and a CPT 300 power cord feeding a power strip that my transport, Dac, and tuner is plugged into. Was a very good improvement.

I think the Topaz isolation transformer you refer to above would work for your ARC CDP and small draw DAC.

Lowrider57,
Just remember that if your isolation transformer is going to be located in your listening room, it will generate some heat and some noise (hum).
For example, my isolation transformer does run warm to the touch (96 degrees F and produce 55 dB of sound with the reading taken within one inch of the transformers). The noise and generated heat doesn't bother me because the power filtration system is located in a different room.
Depending on the size of the isolation transformer, the heat and noise level will vary, however you never know what’s going to happen (noise, heat and filtration wise) until you try it.

@jwm,
If you were to run your 6 dedicated lines to a subpanel and then to your outlets you could put one large 5 KVA isolation transformer in between your main panel and the subpanel.
Just something for you to think about.