Does anyone here know of any cheap and simple way, without purchasing two entire crossovers, to cut out the low frequencies to my two book shelf speakers? The other speakers I have in my system can handle all the power I put to them, but if I get the volume too high on anything with very low frequencies the two little speakers start to distort. I'd rather just turn them into mid and high range speakers and cut out the low end. I'm not too much of an electronic whiz, so what I'm looking for is something I can buy ready to use, cheap. Any ideas?