The production of "Walkman" power connector 01

The first power amplifier circuit is shown in Figure 5-88. The "king of op amps" NE5:5 32 is selected as a 5x line amplifier, and the high-fidelity integrated block TDAI5210 and TDA1521 are used as power amplifiers
in the rear stage . They are powered by dual power supplies OCL . This circuit eliminates the need for output coupling capacitors and can expand low-frequency response. . When the power supply voltage is ±16V, RL=8,fl, the output power is about 2×1 SW. At this time, the distortion is only 0.5%6. TDA1521 has output short circuit and overheat protection functions, which provides convenience for amateur production. As shown on the right side of Figure 5-88 is the power supply circuit. The secondary voltage of the transformer used is 2×12V. After rectification and filtering, the output voltage is ±16V, which directly supplies power to the power amplifier. The power supply and power amplifier of NE5532 share the same power supply a