fdd5d689_e_Notes_on_Coupling_Capacitors__Impressions_HV
[Brand] Sprague 500P9042F6 - Motor Run Oil Cap, 5uF 360VAC $7.00 [Impressions LV] These are really nice. They are fluid, slightly recessed in the midrange, and slightly on the warm side with a big open top end. Detail is good, and the sound is natural with no harshness to speak of. Overall while not the end all of capacitors, a nice buy for the money. Indeed, while it is likely a bit of a crap shoot buying surplus caps, I think they are the best value for money and my first choice unless I want something in particular. Even if I do want somethig in particular, it would need to be in the $30-40 per cap range with new caps to better these. There are lots of NOS motor run caps floating around for cheap, so try a bunch. [Rating] 3 [Impressions HV] 
The higher bias and more resolving system did little to change my basic impression of these. Clearly not the most resolving caps, but a nice balanced sound. Not harsh, maybe a tad recessed in the mids, and maybe a little flat compared to some of the beter caps which is probably a result of the lack of resolving power. But, they do have a nice roundness to the mids, which makes them slightly less resolving, but also slightly smoother than the Solens. So, over all, a pretty nice capacitor.
ecp audio diy: Some Notes on Coupling Capacitors
Impressions HV