Anyone here using vintage speakers?

Large Advents - one of Henry's best IMHO.

I still use a pair of Rectilinear III floor standing full range speakers in a secondary system. I bought them in the early 70s and they still sound good after all these years.

Rectilinear III, Ohm C2, AR3a, JBL LE14C, JBL Studio Master 200B, ElectroVoice, Jensen G610 Triaxial, KLH 5, and this morning I just picked up a pair of Janszen Z-600s that need 2 woofers and a tweeter. Yes, they all get some use now and then. My wife says I have too many!! (You didn't ask about a current reference system, so I won't mention one.)
They all have positives and negatives. I find the current offerings of speakers have less negatives.

Sometimes I really miss my old ESS AMT's.
May still be the best top end I have ever heard.
Bass was thunderous @ 400 wpc (dual mono Carvers) & my neighbors really loved me back then.
If I had the room - I would find another pair, just for old time's sake.

Advent 1's in the bedroom system.