| 摘要 |
PURPOSE:To attain amplitude correction not giving effect on a medium frequency by solving a problem that even the medium frequency not requiring correction is corrected in the case of the correction resulting in not making the characteristic flat so as to emphasize only a low frequency and a high frequency of an acoustic signal. CONSTITUTION:The title device is provided with an amplitude correction circuit comprising the series connection of a secondary high pass filter 10 whose Q is set to be 3.0 or over and a secondary low pass filter 11 whose Q is set to be 3.0 or over, with a power amplifier 12 amplifying and reproducing the output and a speaker 13. Thus, it is possible to realize amplitude correction to emphasize only a low and a high frequency of an acoustic signal and not to give effect on a medium frequency, and a flat in-room acoustic characteristic is realized. |
