I tried a 0.15 uF Hovland in both direction in my phono stage. I preferred the "wrong" way by a fair margin. 5 days of warm up both ways. Did not like the sound in the end - went with Audio (teflon) Cap in the end.
At the moment I am using a 1.0 uF Auricap, but has not gone the "wrong" way yet.
I believe that every cap would sound different when in different orientation.
putting them in the wrong way didn't break them, but I never had them in that orientation long enough to be able to tell if there is an audible difference to the recommended direction
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