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I have expressed this attitude before and I think it bites me by my tail again. Everyone tells that electrolytic in POS are bad. Well, I kind of follow this thinking as well but up to the point. The true is that I never was able to beat actively biased electrolytic in my speaker level crossover and I generally have no problems with electrolytic in PS.

The film is better but the question is which film?  The polystyrene, Teflon or polypropylene and foil do very nice but they usually are small values. If we need the PS-level values and not willing to have 1 cub feet of capacitors then we go for metalized film caps. Here is where the debate of film vs. electrolytic is reversed – I hate the metalized film caps.

I can’t even start to describe how much I hate the metalized film caps – they are not mellow but they are rather eat all texture and transients in sound, literally converting my Vitavox into Altec.  I have dozens of MPK caps that I collected over the years and they all sound very identical.

A few days back I put Obblegato film cap into my MF channel.  Obblegato is large and I thigh it might be different but at this point it does the typical “metalized” thing and to listen my channel more or less tolerably I bypass the Obblegato with 100uF 450V Nichicon electrolytic.

Now, the Obblegato is new and it might burn his “metalized misery” over.  Alternately I might get for a large bank film and foil – I do have space in there and I need just 10-20uF. In worse case I will stay with electrolytic that ironically it my best case. So, does anyone have an experience to observe the pattern how the sound changes in the 500V Obbligato MKP cap while the caps are break-in?

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