The TA-F333ESL HIFI power amplifier is clear and natural in the performance of human voice. The low frequency dynamic processing is in place. The nominal rated power is 125W * 2. The amplification part uses 4 pairs of field effect power amplifier tubes. At the time, it was also a cost. The circuit diagram is as follows: 
OP op amp uses M5220L produced by Mitsubishi Corporation. From all parameters, it can be seen that this IC is an upgraded version of M5218, and the conversion rate reaches 6.5V / us. M5218 was also widely used in Japanese machines. The suffix of L represents a single in-line package. In the Japanese op amp, the performance of the same type L single-row package is superior to that of the general double-row.
In order to achieve the sound quality of HIFI, the tone part is not a common feedback type circuit, but a passive tone control is adopted, so the material requirements of this part are relatively high.
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