"Robert Morein" wrote in message


What are opinions about the choice of caps? How do very
old film caps, say from the 70's, compare to modern low
ESR caps? Should I take the amp apart again and replace
the bank with something "better" ?

As a rule the designers of modern caps have paid more attention than ever to
obtaining low ESR. A modern electrolytic cap probably has as low if not
lower ESR and series inductance than film caps made back in the 70s.