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RE: There's more than one way to do that...

Ralph

I think that most of SS/BJT based amplifiers benefits from 16-ohm load(speaker) vs 4-ohm LS primary from reduced beta drop effect ,
MOS-FET-s ,laterals ,verticals and other FET types don`t suffer from this negative effect , but from high input capacitance which is again highly non linear , and this can be `cured` only with higher standing bias current( A class ) .
Further general problem of SS devices is that N and P complementary power devices is not so complementary as is advertised ,
for example power MOS-FET N & P input capacitances , it is so different , same effect is valid for BJT N & P power devices ,
transfer characteristic is different and not so complementary,
to avoid this N vs P type basic differences some SS amps designers use only same type of power devices , usually only N type connected in SEPP power bridge configuration ,and rarely connected in Circlotron PP power bridge ,
for example somewhere above mentioned Einstein hybrid power amp use Circlotron PP (a)/B class configuration ,
except of this couple examples exist so many others real basic problems related to implementation of SS devices for good audio power amps .


Edits: 09/18/15
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  • RE: There's more than one way to do that... - Banat 16:35:34 09/18/15 (0)
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