LM1875 Super Player Edition

        The LM1875 was a once-popular amplifier chip, and it remains a favorite among enthusiasts. Different users have different power supply and wattage requirements. This circuit allows users to switch between the LM1875's OTL and OCL connections via a switch, enabling them to experiment with different effects. The circuit features a symmetrical design, with the power supply section using Nichicon FW series and Panasonic FK series capacitors in parallel for a richer, warmer sound. Philips Aqua Blue capacitors and Nissei APS film capacitors are used for decoupling, providing independent power to the two channels. The negative feedback capacitor is a Nichicon Green Robe non-polar capacitor. The listening results are excellent, with powerful low frequencies and good density. The circuit board is also compatible with TDA2050 and TDA2030A chips, allowing for direct replacement, but care must be taken to ensure the supply voltage does not exceed the corresponding chip's limits. Those interested can give it a try.