Hola from Panama, Alou,
The nice thing about audio science is that it can tell you if a certain piece of electronics can convert, amplify or modify an audio signal faithfully, and if it is electrically safe and well constructed. Testing can also tell us if a cable or accessory gizmo will preserve or modify that signal. Anyone who does not understand that concept of how science works is incapable of having an intelligent conversation about audio.
I have no idea how anyone with a modicum of intelligence can claim that the philosophy of this website is to rely on measurements alone for selecting audio components, cables and accessories. To make that claim is either a lie - or a lack of basic awareness of reality.
Based on testing and subjective comments here - and some unidentified personal subjective impulses - I chose earlier this year to buy a Topping DX7s DAC/Headphone Amp - even though I currently do not own headphones. I got a deal on MassDrop - $369 vs $499 list price - and bought one in April. When it arrived I dropped it into my system (listed below my signature) and it worked perfectly the first time I turned it on without a single problem - and has continued working that way since I bought it. It does everything I want, and I don't need a preamp anymore since it has multiple, selectable, digital inputs. The DX7s has an excellent volume control, and a nice, inexpensive remote is available if I want it. It is bigger and heavier than the micro-DACS, and I like that. In my 60+ years of playing with audio, it is one of the few components I have purchased with absolutely zero regrets after putting it into my system.
I know that there are many DACs on Amir's list that measure as well or better than the DX7s, and cost either more or less, although only a few have a remote and volume control with a positive and substantial tactile character. However, my final choice was entirely subjective. Even though I had two cheap little Topping PA3 micro-amplifiers die on me in the past year, I still went with Topping for my mid-price DAC, because it is both a heavier-duty component than the micro DACs and amps, and I saw it as a lower cost alternative to RME or Benchmark, two of thr more expensive ASR-tested DAC/HA products that I find attractive.
Regarding the topic of this thread, I see no reason to buy a "USB high-speed isolator" because testing told me that my DAC with a decent stock USB cable from my dual-booting, Linux based INTEL NUC feeding, it drives my vintage Classé Model Seventy A/B amplifier just fine. The only thing I hear in my media/office room that I don't like is uneven frequency response. Rather than fiddling with upstream components, connections, gizmos, and cables, I will work with room treatments, REW and DSP.
Unlike the false claims of the antagonist in this thread, I, like most other regulars here, use objective data for "screening" out poorly designed, manufactured, or otherwise "defective" components, and then I use subjective parameters to make a final decision. I am intelligent, aware, and experienced enough to know that there is no way any other similar good-measuring DAC at any price would sound different if all input and output parameters are within spec and ratings.