How low can you go??
#1
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here is a zip file with 70 6 sec clips of tones ranging from 30-99hz. If you build a cd and start with 99hz and then go down, you can see the effecitveness of a crossover.
http://members.***.net/05magnum/30-99hz.zip
http://members.***.net/05magnum/30-99hz.zip