Replacement capacitors exploding

@mahlman-  "With all the non-polar caps out there I have no idea why anyone would do this."     Same here (makes no sense)!                                                                                                                I’ve never used an electrolytic in a crossover, even when repairing a customer’s.    NOR: would recommend using anything but, at minimum, metalized mylars.    Preferably: one of the better metal films.                                                                                        "Now there is value in using two caps in parallel to get to the same value as one and that is the ESR will be reduced and low ESR is a good thing."    Absolutely/all day long!                                                                                                                                                                             That post was simply an answer to a posed question.

@jamesheyser - Are you still there? Any more info on brand, voltage or capacitance? 

Bryston Amps and electronics as well as Axiom Audio both use Clarity Caps as does Whest Audio in London.  These three very high end producers of sound equipment using these caps says a lot to me and I'd be looking at Clarity Capacitors out of England for really top notch quality and high tolerance components.   They are hand made and tested, very stable and worth the extra cost.... as in expensive!

I absolutely agree about Clarity caps, they are excellent. I'm not sure the benefit would justify the cost for "stage monitors", but that's up to him. I personally haven't use caps in my home speakers in many years as I like active crossovers so much better. Silver plated copper for me.

     ClarityCap makes excellent capacitors.

     Matter of fact: I have four ESA25, 250V and two ESA 50, 250V caps looking for a home. Also: two Mundorf, CFC14 (14Ga), .46 Ohm, 2.7 mH, air core inductors, looking for a good home (someone that actually intends to use them), for the cost of UPS shipping, if anyone is interested.
     I was experimenting with a pair of Maggie MG12 crossovers and ended up going with some Emerald Physics speakers, some years back.

     ANYWAY: The OP’s systems are stage monitors. Whether vocalists or musicians: hearing themselves, on a stage, with everything else that’s playing around them, is always a challenge and ultra high fidelity, imaging, etc: never much of an issue.

     Not that I mean to put words in the OP’s mouth.   Just sayin’.

     The caps he needs: used from inductor output to ground, in a 12 dB/oct network.  Absolutely no need for such high-Dollar caps as Clarity’s.

     We’d been in contact, via PM, a few times and he’s disappeared, of late.  Perhaps: having found his caps?