I took the small rear panel off the speakers to reveal the crossovers. The two large black caps (47uf) are aluminium electrolytics, the rest are film caps, metallised paper. All the silver caps are the same value (3.5uf), there is a single value used parallel in the midrange bandpass filter and six coupled together along the front for the series cap total of 21uf. But where are the coils you might ask?