Please don't remove filter circuit of the speaker system. The function of filter circuit is used to control operation range of each type of speakers, so low, mid and high speakers are working in their predefined range. It also used to control the loudness of each speakers, so provide balanced sound output. If you remove the filter circuit, all speaker are working outside their predefined range and caused interference to each others(overlapping). I will say that your Hi-Fi speaker system is totally damaged. If you really want to remove the filter circuit, you must have a knowledage on design active filter to replace the position of passive filter that you removed.
