Class A Power in A/B amplifiers?

My Coda CSIB integrated gives you 3 power choices,I choose the lowest power.
my integrated 1st watts in pure class A says 18 watts ,it’s closer to 20 ,then 150,300, 600 wpc , and incredible 120 amps short term available for control ,and Huge potted 3kva  transformer ,
and pure class-A  preamplifier section  made in USA ,
I know of nothing under $10k that is even remotely close in  many areas ,a true High end bargain.stereo times was spot on in their review ,after buying it I could not agree more .

Coda is a very old school Company Threshold Nelson Pass - 
his engineers when Nelson decided to go Solo became Coda
they  offer 3 power variants like the excellent CSIB integrated amp 
the preamp is in pure classA ,Mosfet,and FET   the separate Amplifier section 
the first 18 watts are in pure class-A ,then 150,300,600WPC,2 other power choices the higher in power the lower in pure classA,
with largest potted low noise power supply I have seen at under $15k a 3kva transformer and over 120 amps ,that’s enormous power- control on demand and 40 matched Bipolar resistors on the outputs

If referring to vacuum tubes a SET amplifier I believe is around 9 watts Max 
In a 300 B amp amplifier ,you can get 18 watts in a class A parallel circuit 
from my experience from my Tube. Expert  friend Radu.