Panoramic sound amplifier ----- line amplifier

Panoramic sound amplifier, Line amplifier Keywords: panoramic sound amplifier production This article describes the ideal amplifier that is connected to the headset stereo device to broaden the sound. He adds the effect of surround sound to ordinary stereo. At the same time, it becomes more pleasing due to the increase in volume, or it can also be attached. Circuit principle The principle of the circuit is as shown in the figure. Toshiba integrated circuit TA7688P with two small amplifiers is used. The circuit is very simple. A portion of the negative feedback circuit of the two sets of amplifiers is connected to each other in the circuit, which is set up a karaoke circuit. The usual karaoke circuit is to eliminate all the sound from the central position (singer), and the surround sound circuit is only the sound of the central center. In this way, the left and right sounds sounds large, enhance the feeling of stereo. In addition, the outermost sound is widened, although the circuit is simple, it is very interesting. The stereo effect can be conveniently adjusted in the circuit of switching. Note: Capacitors C14 to C19 are directly soldered on the band switch, and only the capacitance C5 and integrated circuit (2) foot lead pads are given on the printed circuit board.

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