for previous black cap - internally blackened yellow cap

Repositioned that loom and no change.
Did not think previously about disconnecting the PREA, but doing so and
the same level of 200KHz on the zero audio out. OK unterminated input to
the PA but why is this bass PA amplifying 200KHz anyway. No schematic ,
so looks like a small cap going in before the assumed Darlingtons (no
predriver size transistors and cold DVM-D would suggest Darlingtons).