NO. If the 11p are the ones I'm thinking off next to each OPA, we (Calrec) swapped every single polystyrene 11p in the first M-series 75 channel desk for NPO/CGO ceramics. This is the CORRECT part to use. Mica/Polystyrene/Golden Pinnae are all substandard for this.Nescafe said:I mean only ceramic 11pF and 100pF using silver mica.....
Guru Scott Wurcer posted some results in another forum that showed silver Mica introduced noise and polystyrenes are microphonic compared to CGO/NPO ceramics. They are the BEST caps you can buy if their value & voltage fit. There's an appendix in the John Hardy blurb on their 990 discrete OPA that shows chapter & verse.
Dunno where the 100p but similar considerations hold.