I use two different 33 uF MKP capacitors in series to make 16.5 uF. One is a DIYaudio Silver cap and the other an old Solen Chataeu Rough(?) Does using them in series have negative consequences? Would it make an audible difference to use just one MKP capacitor? The sound is good and does this compensate for the high purchase costs of a new one? any help is welcome...