[Amps] Henry Differences - 2K-3 VS 2K-4

[AA6DX - Mark]

HOWDY .. My 2K3 has been hot-rodded in the PS department, with Pete Dahl 
having a hand, etc...
What I am interested in knowing, following the thread of current postings, 
is what is the differences between the Henry 2K-3 and the 2K-4, the floor 
models ... the cabinet design is apparent, but what about the innards?
73 .. Mark  AA6DX
Eureka, FAR Northern California .. on Humboldt Bay