The V3 200 Combo is designed to be used with an extension, so it needs a 8 Ohm driver inside.
The old 100 Combos were not designed for a extension cabinet, but neither was my V3 40 Combo & it has a 8 Ohm driver:
The old 100 Combos were not designed for a extension cabinet, but neither was my V3 40 Combo & it has a 8 Ohm driver:


Sin Is Good
Oh those naughty nattis! 

