2 Channel OCL High Power Power Amplifier Board Module DIY Kits Volume Potentiometer Transformer Electronic Kits ComponentsProduct selling point:1: Simple to use2: Wide range of applications3: High power and low distortion4: OCL high-power amplifier kit is a typical OCL circuit5: Multiple optionsCircuit Description:The OCL high-power amplifier kit is a typical OCL circuit. The circuit adopts the direct coupling method and has good low-frequency response; the input stage adopts differential amplification, and the noise is small; the output stage adopts Darlington composite tube, which has high gain, high power and low distortion; This circuit is especially suitable for making power amplifier circuits for household power amplifiers and active speakers, and the effect is very good.The OCL high-power amplifier kit is two-channel, and the circuit principle of the two-channel is exactly the same. Taking the right (R) channel as an example, Q1 and Q3 in the circuit are the differential amplifier input stage, Q5 is the excitation stage, and Q7 and Q11, Q7 and Q11 constitutes a composite complementary output stage, the output signal is taken out from the emitter of Q11 and the collector of Q13, and the output audio signal can directly push the speaker to emit a loud sound. This circuit also adds R25, R27, C11, C13 to reduce static noise.The transformer (T) used in the OCL high-power amplifier kit is a center-tapped dual power transformer, the primary voltage is AC220V, the secondary is two sets of AC12-15V, and the power is 8-100W (can be determined according to needs), the kit does not contain transformers , you need to bring your own or purchase it separately.At present, the transformer in the store is a 12V 8W dual power transformer.Supply voltage: dual power supply AC12-18VOutput power: Po=20W+20W (RL=8Ω), 30W+30W (RL=4Ω)Load impedance: 4-8 ohms (8 ohms/30-60W are recommended for speakers)Output impedance: 4-8 Ω.list:X-HX0342A: Parts + volume potentiometerX-HX0342B: Parts + TransformerX-HX0342C: Parts + Volume Potentiometer + Transformer