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Is it just a matter of thicker gauge wire or shielding and other factors?
By the way Silent One, could you give me a few recommendations that you think would be the best bang for the buck isolation components to start off with? It sounded like you have a lot of experience in this area. My audio rack seems to be a nice sturdy basis, but I would like to add isolation feet or cones or spikes or whatever to make sure I'm not giving up extra sharpness and resolution.
My amp as you know is the WA22 and the DAC I am using is the Audio-gd NFB-10WM. I'll repost a pic I added to show a close up of both. I was going to PM you, but I would like to hit 500 posts this year - lol. Plus this entire thread feels like a long group PM, which I like
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You have an extraordinary sense of timing! I just sat down not 15 minutes ago to start gluing some footers on my amp to experiment further. I still know very little about the "Secret sauce" and what it takes. I understand the basics but once I start to experiment, I realize there are many combinations that can affect your sound one way or another.
I learned a couple of things last week by playing around with platforms and footers. One, sometimes the sonic presentations realized are neither better or worse than what I had but just different. I am reminded of tubes in this regard. So then, running through my music library revealed some of my favorite tracks sound better some of the time and sometimes less so. Then a decision has to be made: "Will most of my favorites sound better this way or that way?" Tracks that formerly sounded just ok now sounds great with new footers/platform. And some tracks that always sounded great now sounds poor or not so good...
merde!
I'll share whatever I know from both reading and actual doing (real world). Now that I've found a few things out, I'll now be on the lookout every once in awhile to improve my system through isolation. Also, even if one manages to place their component onto a nice platform with footers, it is considered to be Direct-coupled" as opposed to "Isolated." Unless the footers are specifically designed to isolate from ground vibrations. A quick test: if you shake the platform or surface below the component, and if the component follows the movement of shaking, it is "coupled" not isolated. If the component is trying to maintain its center while there's shaking underneath, then the component is truly isolated. This part of the hobby reminds me of Seismic studies.
Perhaps, I've said all that to say, I'm not sure what to recommend as I read up first and only now beginning to play around to find out what I like... and I don't want to spend a lot and end up with junk!
I'm drinking the Mapleshade kool-aid by the cup, not by the pitcher. Anyway, concentrate on your source first, this is the area of my biggest gain with footers and platforms (Front-end and DAC). The amp can still benefit but there's more payoff upstream.
You're off to a great start with the rack though! Should you have questions, I'll do my best to help you out. And if you do not, I'll simply share my findings along the way while I continue to research. Lastly, on the adapter, you'll benefit from having thicker wire, insulation and grid cap. I'd send Jack a Tweet in hopes he can address this on Monday.