| 摘要 |
PURPOSE:To expand a reproducing and expressing capacity by taking out a low pitch extent signal from the speaker output of an acoustic equipment, etc., and the signal this for driving an exclusive-use speaker. CONSTITUTION:The left channel and right channel of a stereoscopic signal are fetched from the external output terminal of acoustic equipment 1 and mixed by an amplifier 2. The output of the amplifier 2 passes through a low pitch extent frequency through a low pitched filter 3, and after the level is adjusted by a level controller 4, the output is supplied to an output amplifier 5. The output amplifier 5 drives a speaker 6. The low pitch extent filter 3, is set for example, so as to pass through the low pitch extent frequency of about 170 Hz or below. |
