DC STEREO AMPLIFIER P7 Power Amplifier (36,000 yen) This amplifier uses a DC amplifier configuration that does not use capacitors within the negative feedback loop. Furthermore, it uses dual FETs with good thermal coupling to suppress DC drift, achieving stable operation even with a wide range of temperature changes. The final stage employs a pure complementary SEPP OCL small circuit with RET (Ring Emitter Transistor) known for its excellent linearity. A/F stereo tuner 7 (36,000 yen) The power supply uses a toroidal transformer with excellent regulation characteristics and large-capacity capacitors, ensuring sufficient power supply even during effective output. It employs a quartz synthesizer tuning system. In this system, the frequency of the oscillation circuit is compared with the oscillation frequency of the quartz, and a PLL circuit controls it to ensure correct tuning at all times. This system uses variable capacitance diodes (varactor diodes) instead of a variable capacitor. It is equipped with a preset one-touch direct tuning function, allowing for preset of up to 6 stations each for FM/AM. To preset, after selecting a station, press the memory key, and while the green indicator is lit for 5 seconds, press the desired preset key to store it on that key. Auto tuning and manual tuning are available.