Anyone tried to improve Jamo's Concert 8 speakers?

My idea is to substitute the capacitors for the Jantzen Superior Z caps. I used those capacitors to improve my Jasmine lp 2 phono stage and am very satisfy with the result. Jamo used for the Concert 8 the excelent drivers from the so called 'Excel series' from SEAS; magnesium 6"(?)bass/mid driver and the T 25. I need some encouragement from those who have tried + advice how to get inside. As far as I can see the bass/mid driver is the only way to get in?
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