Simple pre-frequency crossover amplifier

Reproducing high-quality sound through simple circuits is a goal that many audio enthusiasts pursue tirelessly. This circuit is based on
this point. It uses a simple circuit to reproduce beautiful music and is suitable for audio enthusiasts.
    This circuit is designed using a dedicated integrated circuit TA7630P for stereo sound, volume and balance control . This integrated circuit realizes volume, tone and balance control
by changing the DC voltage on its ⑦, ⑧, ⑨ and ⑩ pins , avoiding the mixing of noise and improving the signal-to-noise ratio of the circuit. The potentiometer leads can be easily It is long and has a casual layout, which reduces the difficulty of production. The schematic diagram of the corona circuit is shown in Figure 5-123.     In order to save the more expensive I. C frequency divider and to obtain more pure sound quality, this circuit uses rkc passive two-way frequency network , which can not only obtain flat amplitude characteristics and phase characteristics, but also make the circuit production extremely easy. This circuit is composed of resistive components to form a passive two-division frequency network. According to the values ​​in the figure, the frequency division points are. Factory 1 l/2丶RC≈l60/RC≈3, 4kHz.