High amperage High-pass filter

I need an inexpensive speaker-level high-pass filter that can handle the higher amperage of a large power amp. It is for a bar that is exploding speakers. I need to set a "brick wall" at about 60Hz. Radio Shack only has the little caps that are likely to explode. I went to the local car audio shop and they had nothing that would work. I went to the local guitar shop and they had nothing that would work.

Any advice would be most appreciated.