Charles,...please see the text below the photos and I hope these will answer your questions.
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LEFT RACK (from top to bottom):
1. Esoteric Grandioso P1 Transport: CD, XRCD, K2HD, SACD platform. Is powered by 2 separate umbilicals from a fully external power component with multiple internal isolated power supplies. See below for notes on the Grandioso P1 Power Unit.
See below for notes on connection options out of the P1 and into the D1 DACs...
Net net: best to use dual-HDMI from the P1 to the D1 units and get upsampling by the transport of PCM to 8X and native / pure DSD (no upsampling) done by the transport. You could come out dual-AES from an Esoteric transport into the D1s,...see notes below.
2. Esoteric Grandioso D1 Monoblock DAC: (Left Channel unit) a full component dedicated to a single channel, 16 AKM 4495S DAC chips for a single channel. Is connected to the P1 Left channel proprietary digital output via "ES-LINK", Esoteric's proprietary use of an HDMI cable conduit throwing out the (non-audio friendly) HDMI spec and simply using the cable for its incredible band-pass and conductor count.
Note that you can connect into this using dual-AES from an Esoteric transport as explained above however dual-HDMI gets you the newest upgraded ES-LINK4 support according to Japan Engineers (and my ears so far), despite the fact you have no choice of upsampling (it's always 8X for PCM and straight DSD for SACD) and there is only 1 choice of filter (FIR or OFF), it conveys the best musical and sonic result.
When coming in into the D1 monobloc DAC from an older Esoteric transport that allows digital outputs, you can come in via single AES, dual AES or other digital connections. Same for any non-Esoteric transport source (single AES only though) that allows AES or other digital output.
When you do come into the Left-channel designated D1 via AES or other digital input, you have the ability to choose upsampling (1X or none, 4X, 8X or to->DSD) for PCM material. Note this is the same for any server and streamer using D1s and mighty power DACs.
As the source connects into the Left channel designated D1 only, the D1 is the master unit and is configured as such; it is connected to the 2nd D1 unit (the slave if you will) designated as Right-channel via an HDMI cable. The Left-ch D1 splits out the right channel audio info and sends it over HDMI to the Righ-ch for processing along with instructions as to the settings that are determined by the master (Left-ch) config.
3. On the bottom shelf is the dedicated power supply for the Esoteric P1 Transport. I believe they list it as the "Grandioso P1 Power Unit". As mentioned above all power supplies (5 I believe) for the P1 are kept out of the transport entirely as there are two (12 pin DC Umbilicals) carrying pure power to feed each isolated (left and right) channel side of the P1's output as well as its transport mechanism and also control circuitry, all via isolated DC feeds. Getting the power supplies out of the transport allows an obsessive level of focus on the highly specialized build and resultant performance of the P1.
MIDDLE RACK (top to bottom):
1. Esoteric Grandioso D1 Monoblock DAC (all notes above apply)
2. Cybershaft OP21A (Type2 curated OCXO assembly) Premium Limited v2 custom-designed 3-output 10 MHz master clock. I won't delve extensively into the use of and benefits of an external master clock as that's been covered in great detail elsewhere. I will say that this particular clock has been with me for a few years and is one that I assisted in the definition and design of with Kenji Hasegawa's immense knowledge brought to bear from Cybershaft. There were quite a few things we did inside this unit that were unique at the time and it still equals or betters on the test bench as the Japan National Standards Institutes the best clocks today from Cybershaft, Sforzato, Esoteric (G1 and G1X), etc... The ideas and design/build and materials principles in this clock that I bought served as the ideas now incorporated into the more recent Cybershaft offerings out there today.
FAR RIGHT (mostly out of photo):
*waiting for a new AV45CS2 2-level rack from Adona to arrive as I had to claim those rack levels for the the new 5-box digital front-end where previously had been a 3-box...
1. Shunyata TYPHON QR
2. Shunyata TRITON V3 (using full chassis ground plane as well)
(no details on Shunyata units, plenty written here and elsewhere)
Hope this helps and I have not confused the issue...