fdd5d689_e_Notes_on_Coupling_Capacitors__Impressions_HV
[Brand] Axon True Cap - Metalized Polypropylene, 250V $2.75 [Impressions LV] Percy sells these as being essentially the same as Solens (and for all I know they might be made by Solen), but to my ear they are slightly more detailed and natural sounding though there is still a bit of midrange grain. If you have a choice between the two, I think these sound better. There is a good chance that the difference here had to do with these being 250V caps and the tested Solens being 400V. Thus, you might take this as a review of 250V Solens? Maybe, maybe not. [Rating] 2 [Impressions HV] 
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ecp audio diy: Some Notes on Coupling Capacitors
Impressions HV