[Vintage-Audio] Mark IIIs (was JVC speakers)

[Rick Larson]

Bob,
 
> Will be driving them with a pair of Dynaco Mark III amps
 
> O'kay, o'kay; I also admit replacing the original input/driver
> boards with a more modern phase inverter driver circuit
> which uses one each of 12AU7 and 12AX7.  I think the
> circuit came from Kevin Kennedy a few years back.

Do you have anymore info on this?  I'm planning to upgrade
the boards with the Curcio ones this winter (sourcing parts
now) but curious what these are.

Thanks,
rick