I had been using a pair of the Waveform Mach MC/MC.1 (about 20-25 years old) as my only speakers for a number of years.
I replaced them about two years ago with new old stock, same make and model. If I had to guess, I would say that the old Waveforms had about 85 to 90 per cent of the sound of the new Waveforms. They use Vifa drivers.