I’ve tried Primaluna, Zesto, PS Audio BHK Pre (Hybrid Tube) with SS amps, class D included. If you get the gain matched correctly, works really well, blending some of the tube magic with some of the attributes of SS / Class D. Exciting to watch Class D technology, design continue to evolve. Most of the designs in Audio currently are mature, tweaks that can be made but not the leaps happening with Class D. Class D designers are working overtime to dispel the old stereotypes associated.
Tube Pre/ Class D Amp - Who has done it?
Open forum for those who have actually tried this. Really curious to know who has been happy, or maybe unhappy, with a tube preamp driving a Class D amplifier?
Of course, tube pre with a solid state amp is a classic pairing for hard to drive speakers, especially ESL's. This is a little different. I'm really curious to know what pres and Class D amps have had great synergy.