Have owned JBL, 4311 and agree, thy are fabulous with punch and authority. EV Centurion Corner Horms - just sound like music. Playing a set of '63 Tannoy, Belvedere now and they are sublime; truly my wheelhouse. 15" Reds are amazing in that volume cabinet. C'mon on the ESL 57s are spooky good. All of these played with vintage Mac... not sure what you're looking for.
All Pre 1970 Vintage speakers suck! Prove me wrong
Have tried many vintage speakers.
My conclusion: All pre-1970 vintage speakers suck. Well-made but crappy sound.
Used with both vintage amps and modern.
I do like many vintage amps such as Radio Craftsmen RC-500, Marantz tube, Scott tube, Heath W5, Lafayette and Pilot tube.
But back to pre-1970 speakers:
No bass, harsh, or honky mids and no highs. Not musical or listenable to me.
Tried many including Acoustic Research AR-3a, 2Ax, etc. The entire AR product line. Also Klipsch Horn, Large EVs. Altec VOTT. Pioneer CS-88 and 99.
Nothing pre 1970 is even close to the better modern speakers.
I challenge you: Prove me wrong.