Might be very hard to tell. They're so close together that defects probably can't be seen unless visible from the top. Also, due to the sheer number, I wonder if some are redundant in case of failures? If so, the sound may not change much but then I'd worry about bad caps potentially damaging surrounding ones over time. Great price on the Denafrips but too bad (for me at least) they couldn't find a better design solution. I'm more a fan of solid-state caps but I realize they may not be the best performance option for certain audio equipment.