Wayne Parham Messages: 18787 Registered: January 2001
Illuminati (33rd Degree)
The impedance of the load is really more problematic for tube amps when it rises, so Zmax is probably the bigger issue for you. Fortunately, Zmax is very low. Great for tubes.
There are no driver options for the one π, two π or two π tower speakers. The only drivers available are the standard parts. Some of the larger models have optional upgrade drivers, but not the one π or two π loudspeakers.
The drivers (and associated PDF specifications files) are listed on this page: