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I've been watching the THD display through the day. I presume this displays the THD of the AC going into the unit, rather than that coming out of it. It started off at 1.25%, peaked at about 1.37%, and is now, Saturday mid afternoon, down around 1.10-1.15%. The read-out changes up and down by one click almost every second. I don't know enough about electricity and mains supply to know if these values are high, typical or low.
I don't know if you have thought of this before but is your elctric supply to your system from your ring main or a dedicated supply from your box to your system alone . I have made myself a new spur with Neotech 3001 mains cable, it's fantastic stuff but expensive. It is very well shielded against RFI and mains nasties and it has made an amazing difference to my system ,no fridge clicks or transformer hum anywhere. It was the best couple of grand I have spent in a long time.
Although this mini-review doesn't seem to have spurred any real interest, report further adventures in power conditioning.
I dragged home a Furman IT Reference 15i--50 lbs of isolation transformer. Inserted in the system, it, like the Isotek, does not remove one jot of the hum from transformers or speakers. Disappointing.
In a shootout between it and the Isotek on overall musical presentation, the Isotek won, but not by much. Isotek sounded a little more natural, particularly on solo piano, where it sounded more like being in the same room with someone playing live.
I then reinserted the Ayre AX-7 into the system. Absolute silence all around, with or without any conditioning. I had to jam my ear against the speaker drivers to hear anything at all--after checking that everything was turned on.
Conclusion. The Rogue CMII is a really great-sounding amp, especially for its price. Overall, I still think it sounds a little more fully fleshed than the Ayre, which is itself no slouch. But it is not silent. I don't know if it's just the example I have that is a bit noisy, particularly in the very quiet listening room that I have, or whether the model is inherently that way, especially with reasonably efficient speakers.
(BTW, before all this I tried every hum-reducing trick in the book, including all the recommendations from the PS Audio webpage, a phone call with Rogue, an Audio by Van Alstine Humdinger and an Ebech HumX.)
Klobnitrones (I won't bother to ask how you derived that name!);
I want to thank you for your post. It helped me decide to try the Syncro in conjunction with the Aquarius. I have some very slight hum which I believe to be from my transformers, though I haven't experimented enough to tell if is coming from my preamp or amp. I am assuming it's from my ARC amp. But anyway, I had never heard of the Isotek Syncro until your post and I am intrigued to see what it might bring to my system.
A couple of weeks ago I noticed my Sigma 3 was running 8.70% distortion so I called my dealer who said to bring it in for a check, they gave me a Genesis Masiac to use in the mean time. They just informed me that Isotech is sending a new board what ever that means but I'm happy to know that something is wrong and its being fixed and Im enjoying the Masiac for another couple of weeks.