I connected the new Shunyata ALTAIRA grounding hub to the Extreme and here are the initial findings.
I was skeptical, but I trust Shunyata's claims and relative to the cost of my system, the cost of the ALTAIRA is low.
In short, i
f you already have an Everest or Denali, consider the ALTAIRA a must buy. The ~$4K cost (including ground cables) is about that of a high end power cable/interconnect, and should be considered better value.
Omega ground cable connected to Extreme:
View attachment 101001
I am using the Signal Hub. The difference between the Signal and Chassis Hubs is simply due to whether or not you plan to segregate components (e.g., analog vs digital) or not. If you plan to connect analog and digital components to the Hub, get the Chassis. If you plan to connect only analog or digital to one hub, get one or more Signal Hubs. Shunyata's terminology is a bit confusing, since it has nothing to do with how you ground the components. In my case I only have the Extreme connected to a single hub, so I got the Signal. I also have another Signal Hub for the Nagra HD DAC X and the DarTZeel 18NS preamp power-supply.
Initial listening impressions (this is at initial power-up; keep in mind the break-in time is 150-200 hours):
It was not an immediate 'hit you over the head' change, but with careful listening it was obvious that there is a lot more detail, authority, "energy", and presence, especially in the upper midrange and high frequencies.
Keep in mind that I have a highly revealing system. The field coil RCA 1443 midrange, with its mammoth 50 lb. weight and ~6" voice coil is often called one of the best midranges in the world and the Fostex t500aMkII super-tweeter, with its large Alnico voice-coil, is also highly revealing. Both are horn-loaded and highly efficient (>100dB), and fed by a Nagra HD DAC X and DarTZeel amplification -- so if the detail is on the recording, there's a very good chance it will be heard... or so I thought.
• Listening to Dexter Gordon
Montmartre 1964 (2XHD),
Manha de Carnival, I had never noticed the cymbals before. They are easily heard now.
• Localization has improved, but not to the point of being hyper-localized, which can take away from the suspension of disbelief that you are at a live event.
Sound of Movies (Budafok Dohnanyi Orchestra), which was lacking a bit in terms of localization compared to other orchestral recordings, now sounds more convincing.
• Dave Brubeck Newport 1958 (Remastered) - improve clarity and localization is very apparent.
• Norah Jones Nightingale - I had never noticed the subtle high hats before, and I listen to this album
a lot!
• Bach Cello Suites - more precise localization of the box moving across the cello strings. You can basically 'see' the bow moving across the strings now. XDMS made a big improvement here, the ALTAIRA furthers it.
Finally, I was already using a ground wire before, Duelund 16GA stranded tinned copper in cotton, which was connected to the Denali's grounding post. So I already had some grounding in place.
Also, keep in mind that my home has pretty good incoming AC already. When I had a PS Audio P20, incoming THD was about 3-3.5% and voltage was 121V (dropping to 119-120 when components were on). The transformer on the street is new and the home is 8 years old, so the grounding is probably also quite good. Older homes will probably benefit from the Everest/Denali + ALTAIRA solution even more.
The point is that it’s very interesting to hear that the Extreme can benefit from this new Shunyata grounding solution.