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Brief description of the drawings
FIG. 1 is a perspective view of a speaker unit (a front decoration frame is omitted) provided with
a conventional equalizer, FIG. 2 is a partially cutaway perspective view of the front protective
plate of the present invention attached to a baffle plate, and FIGS. FIG. 4 shows the frequency
characteristics of the speaker unit of the speaker system of the present invention (the same parts
as those in each drawing have the same reference numerals). 1) a baffle, 2 a speaker unit, 3 a
vibrating plate, 4 a front protective plate, 5 a small concave hole, 6 a small through hole, and 7
an equalizer.