@kmcong ...PS Audio was coming out with their new Stellar Gold Preamp, and I was given the opportunity to beta test one. The improvement was remarkable! Soundstage was wider and deeper, greater detail, just more musical in every way!! And it’s a ss preamp. Your results may differ, but it sure improved my system. And BTW, many who have tried the new Stellar Gold Preamp and compared it to the BHK Preamp (which has a tube input stage) preferred the ss Gold Preamp.
Did you get a look inside the Stellar Gold Preamp by chance? I followed along with the design and designer a bit on this one, and keeping an eye on it into production. There are several stages and various components going on in there, looking inside.
For those who don’t believe a good preamp (adds or removes) anything, take a look inside this one. What I first thought might be a simple preamplifier design, was a very incorrect assumption. Imo, using a DAC with a decent volume control won’t usually hang in the sound department, compared to a system with a really good active preamplifier in the mix. It seems good preamps aren’t totally dead yet.