So long as you replace caps with new of equal or higher V that's usually fine.
100V is pretty high for most speakers, but a lot of film caps only come in 400V or higher. That's fine.
As for the 20uF, try an 18uF and 2.2uF in parallel.
100V is pretty high for most speakers, but a lot of film caps only come in 400V or higher. That's fine.
As for the 20uF, try an 18uF and 2.2uF in parallel.