Old tube versus new tube gear

Thank you Al,
Modern speaker designs are up to par and some perhaps much more so,
I would certainly imagine.
My idea of the pairing with vintage speakers of the day was purely nostalgic.

Look into the Cayin/VAS line of tubes. These are all new, great sound, great value. Most of the units designs are knockoff's of the classic legacy tube units of Marantz and McIntosh. You get great old designs done in state of the art parts. I have the a Citation pre-amp, amps (2 pairs of monoblocks), integrates (2). You will not be disappointed.

More or less, every current production tube amplifier is a knockoff of one of the three classic designs.

Sonically, I find some of the differences in new and old are related to:
1) A lot of the older designs used a lot more circuitry
2) As people had less money back then, many older amps are biased colder to prolong tube life
3) Older designs used carbon resistors and paper in oil coupling capacitors to produce their richer sound. Modern amps generally employ metal film resistors and polypropylene coupling caps, and sound more forward and insightful