It could also be helpful to connect your Merging directly to the Sotm switches as an additional datapoint.
I wish you a speedy recovery!
Thank you for the kind wishes and all the support. I took some time to do some of the suggested tests (I’ll do more as circumstances allow). In order to make these tests easier and faster, I decided to focus only on the sibilance while listening, but will mention anything else that stood out. Below is a summary and aggregation:
Ed was kind enough to send me a DM explaining that he’s found sibilance related to (and I’m paraphrasing so forgive if I misspeak) vibrations and anti-vibration solutions.
So first I removed the Butcher Block with Gaia feet platforms from both the PSU and the Taiko switch. I placed them both directly on the wood of the rack. The overall sound of both switches was worse and the sibilance (while still reduced from first listen) was evident in the Taiko and perhaps now a little more in the SOtM.
I then put the PSU on 3 Isoacoustics Orea disks. There was some improvement in both switches, but overall SQ not as good as I heard originally and the difference in sibilance the same. Of note, in the SOtM there was a new noise, almost like a sonic rattling, that I hadn’t heard before.
I put the PSU back on the platform and the difference in sibilance was similar, but that “rattling” noise from the SOtMs was gone. The SOtMs sounded very good.
I then put 4 Orea feet under the Taiko and its sibilance was reduced. In comparing it to the SOtMs, the sibilance made the occasional appearance but didn’t sound out of character like before. I couldn’t be sure if the Taiko was doing more with the recording or there was still something going on. (If pressed I’d say the latter.) Overall,, the Taiko sounded the better of the two. Analytically, it was more precise and resolving. (I wasn’t listening for musicality.)And the leanness and edginess I mentioned previously weren’t evident during this listen.
I then swapped the Taiko’s PSU to the wall wart. There wasn’t a significant change in sibilance, but, of course, it didn’t sound as good overall. However, it sounded much better than I expected.
In summary, the sibilance issue is much improved and I’m analytically impressed with the Taiko. Based upon what I’ve just heard, I think Ed is right. The issue is in the proper isolation. While the Orea feet were a great improvement over the wood platform for the Twiko, I surmise there are better solutions out there. There are still other tests to run and I’ll do so when my health and time allow. (Im in the process of moving. The system will be broken down in two to three weeks.)
Overall, I’m really excited about the switch and it’s only going to improve with the router and distributor.