Pioneer SX-1050 Re-Capping - Film or Electrolytic??
I have read numerous well-written technical articles on the attributes, both negative and positive, on the electrolytic and film capacitor debate. I am now re-capping a Pioneer SX-1050 receiver (37-years old). I want to make a sonic improvement in this receiver by using better capacitors. I realize that the caps made today are far better than what was used for production originally. Cost is not a consideration as I know film caps cost more. There are 3-PC boards I am focusing on:
1) Equalizer Amp Assembly (AWF-020) 2)
2) Flat Amp Assembly (AWG-040)
3) Control Amp Assembly (AWG-041)
These PC boards have a mix of film (mylar), tantalum, low-leakage EC and standard EC caps. I am going to replace all the tantalum and EC caps. The cap choices are:
1) Wima MKS2 PET Metallized Film
2) Nichicon KL Low-Leakage electrolytic
3) Nichicon KT, KZ, KA “Audio-grade”
4) Elna Silmic II electrolytic
Considerations:
1) The original “orange” and “pink” colored EC caps were low-leakage. If I stay with the low-leakage design constraint, then my choice is either Wima MKS2 or Nichicon KLs. The KLs are not “audio-grade” per se, but they are a replacement match for what was in the circuit. The Wimas are low-leakage as well and there is enough space on the boards for the larger case for the caps that are under 10uF. Which should I use??? Has anyone already used Wima MKS2 film caps and got a sonic improvement in this application????
2) The original tantalums need to be replaced, but with what? Low-leakage, Wima MKS2 film or “audio-grade” EC caps????
Any thoughts? Has anyone stuffed these board with all Wima MKS2s and how did it turn out?? I’d like to do things right the first time.
I have read numerous well-written technical articles on the attributes, both negative and positive, on the electrolytic and film capacitor debate. I am now re-capping a Pioneer SX-1050 receiver (37-years old). I want to make a sonic improvement in this receiver by using better capacitors. I realize that the caps made today are far better than what was used for production originally. Cost is not a consideration as I know film caps cost more. There are 3-PC boards I am focusing on:
1) Equalizer Amp Assembly (AWF-020) 2)
2) Flat Amp Assembly (AWG-040)
3) Control Amp Assembly (AWG-041)
These PC boards have a mix of film (mylar), tantalum, low-leakage EC and standard EC caps. I am going to replace all the tantalum and EC caps. The cap choices are:
1) Wima MKS2 PET Metallized Film
2) Nichicon KL Low-Leakage electrolytic
3) Nichicon KT, KZ, KA “Audio-grade”
4) Elna Silmic II electrolytic
Considerations:
1) The original “orange” and “pink” colored EC caps were low-leakage. If I stay with the low-leakage design constraint, then my choice is either Wima MKS2 or Nichicon KLs. The KLs are not “audio-grade” per se, but they are a replacement match for what was in the circuit. The Wimas are low-leakage as well and there is enough space on the boards for the larger case for the caps that are under 10uF. Which should I use??? Has anyone already used Wima MKS2 film caps and got a sonic improvement in this application????
2) The original tantalums need to be replaced, but with what? Low-leakage, Wima MKS2 film or “audio-grade” EC caps????
Any thoughts? Has anyone stuffed these board with all Wima MKS2s and how did it turn out?? I’d like to do things right the first time.