That's pretty reassuring thenmy previous post I talked about building my Class A single ended amp after reading a book by Dave Hunter ( UK ) Guitar Amp Handbook. My tube configuration is 5Y3, KT66 and 12Ax7.
speakers are Jensen 16 ohms for 10” and 8 “ speakers
this amp can rattle the windows on compress you chest when
turn it up or be mellow and soft. Speakers can be played in pair
or single with a two phase switch.