STK465 is a high-power stereo thick film audio amplifier produced by Japan's Sanyo Company. It has high output power and low distortion. It is a commonly used thick film amplifier. Compared with amplifier ICs such as TDA7294 and LM3886, the sound quality is different.
The figure above shows a dual-channel OCL amplifier circuit composed of STK465 thick film amplifier. When the power supply voltage is ±28V and RL is 8Ω, the output power is 2x30W, and the harmonic distortion is only 0.08%. If the power supply voltage remains unchanged and RL is 4Ω, the output power can reach 2x40W.
The STK465 thick film amplifier adopts a single-row 16-pin package, the input impedance of the circuit is 32KΩ, and the frequency response can reach 20Hz~20KHz. Because the thick film amplifier circuit has good high-frequency performance and no output coupling capacitor, its treble is delicate and transparent, and the bass is thick and powerful.
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