why are C37 and C38 3300 μF instead of 4700 μf like in schema or 10000 μf like in K8081 schema
can this cause power fall and the speakers are clipping or something, dont know how to describe it when playng louder or what is causing that? should these condensers replaced with these like in schema Sorry for my bad english
3300µF is fine.
Distortion is most likely caused by excessive speaker cone travel due to too high volume or bad cabinet damping.
but is the power falling about 20 v normal? when turning up volume
How did you measure this ?