The output pins connect directly to the speakers, but a (an RC circuit consisting of a capacitor and a
resistor) is usually added between the output and ground. This prevents high-frequency oscillation and keeps the amplifier stable under varying speaker loads. stk413-430 circuit diagram
Since Sanyo discontinued many STK modules, the market is flooded with "clones." Authentic modules have crisp, centered printing and a heavy, high-quality base plate. Conclusion The output pins connect directly to the speakers,