Thanks--I had no idea how to "date" my speakers. I guess that means my Valencia speakers are from 1969 since their horns/diaphragms are stamped 391943 and I'm pretty sure they weren't still making Valencias in 1979. I've been told that the vdc rating on caps is how much power it can withstand and that what I'm really trying to match is the uf figure. So, I'm assuming 8.2 uf is close enough to the original 8 cap, Solen makes a 10 uf cap which matches the original 10, but is a 12 uf Solen 400vdc going to be close enough to the original 11uf 50 vdc (keeping in mind the Solen is +/- 5% and the original is +/- 10%)? So I guess there's two questions there. Is 400 vdc fine to replace 50 vdc caps and is 12 uf close enough to the original 11 uf (400 vdc are the lowest I've found in most brands of caps)... I've read that it's good to have 400 vdc in crossovers--all it does is give you more headroom and shouldn't effect the sound otherwise--do you think that's true? Could a bad cap(s) be the reason one of my horns sounds doesn't sound quite as bright as the other? I read somewhere that it's always a good idea to replace the crossover caps on a 40 year old speaker--is that usually true? Lastly, the "copper" doesn't look that great in these crossovers either---is that something to worry about or should I wait until after the caps have been replaced and then see how they sound before I worry about the "copper"..... 15 I think I'll need to start a new thread just on crossovers.....