| 摘要 |
PURPOSE:To obtain masive and powerful low sound, by inputting a signal frequency from a program source, outputting a low frequency at a low harmonic generating circuit and providing a speaker reproducing low frequencies exclusively with this signal for widening the frequency characteristics toward low frequencies. CONSTITUTION:A tuner 1 and a cassette deck 2 being program sources are connected to a preamplifier 5. The output passes through the low harmonic wave generating circuit 7, is amplified at a main amplifier 6 and connected to the speaker 4. On the other hand, the main amplifier 6 is connected also to a filter amplifier 8 and the output drives a panel speaker 9 also. In such a design, this low harmonic wave generating circuit 7 generates a sound having frequency a half the frequency of a low frequency signal among input signals, e.g., 80- 160Hz, and gives an output with the mixture of the original sound. Thus, the frequency characteristic of the audio system is extended to low frequencies. |
