Adding filter caps to DR250s

[Monck]

Hi all.
I have an older pair of DR250s that I'm refurbishing.
I don't have crossovers in my cabs, the piezzos and the drivers are all wired together.
I've seen mention of adding filter caps to the later version of these cabs in for better efficiency, and I'd loke to add them to my cabs, but can't find any details on how or what is needed.
Can anybody supply that info please?
Regards
Monck

[Bill Fitzmaurice]

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