In the case of phono preamps, I would definitely at least look into the possibility of tube based ones. That’s not to say there aren’t some great solid state options out there. If you’re looking into a tube based unit, Tavish Designs makes some great sounding well thought out designs, which is why I own one. The owner, Scott Reynolds “holds a PhD in electrical engineering and has more than 25 years of industry experience in design engineering and engineering management, and he has more than 30 US patents.” That’s someone I trust designing and building a phono preamp. I hope that’s of at least some help to you, and good luck on your quest for a new phono pre! ✌️🎶
https://tavishdesign.com/
https://tavishdesign.com/