Proac 3.8 / amp match

What preamp do you have?

Well, just a brief story, maybe this will help you. In the '90s I was a Proac owner, first the Response 2, then the Response 3. Both very tube friendly, very easy to drive with the ARC tube amps I loved (D76A, then the VS55). So when the 3.8 came out, I figured, hey, why not. But I should have done my homework because the 3.8 was a different animal. The VS55 didn't control the bass very well and I suspect the 3.8 did not have a tube-friendly impedence. I later found out that they did much better with higher powered, higher current, 4-ohm friendly solid state, so the the 3.8s had to go.

I have an ARC LS15 and a VTL2.5.

When asked what was the best sounding system I have ever heard I recall a pair of Proac 3.8s driven by a pair of Cary tubed monoblocs. Unfortunately for this thread, I can't remember the model number but I think it was Rocket 88. The source was a Cary tubed cdp.
It had the most natural sound I have experienced in a home system. I've heard more expensive systems but none as relaxing to listen to.
FWIW, I have only owned Proac Response 1.5s and didn't really love them like I expected to.