Number of tubes in Pure Class A amps

Can someone explain, as simply as possible:), how, eg a Jadis DA S88 (60 WPC) needs 8 KT 88 output tubes, whereas an Ayon Spirit II, also advertised as pure Class A (60 WPC in pentode mode, 40 in triode) only has 4 KT 88 output tubes? Is the power output ability in pure Class A not a linear function of number of tubes?
springbok10
8 responses
 05-03-2009 4:48pmFurthermore, does Triode mode mean Class A by definition, and, conversely, does Pentode mode mean AB? Is Ultralinear the same as Pentode? (eg Manley Stingray and TAD 1000 have Ultralinear/Triode modes. 05-03-2009 5:12pm>>Is the power output ability in pure Class A not a linear function of number of tubes?<>does Triode mode mean Class A by definition<>, conversely, does Pentode mode mean AB?< Is Ultralinear the same as Pentode? (eg Manley Stingray and TAD 1000 have Ultralinear/Triode modes<>So Ayon may indeed be accurate in saying that it is Pure Class A, both in Triode and Pentode? But the 4 tubes only seems a stretch?<