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Why LA 4440 is worst amplifier IC present today ? Because its is very old generation Class B audio IC . Noise is too much as per today's standards. Original 4440 manufactured by Sanyo was discontinued long back. What you get in the market are cheap Chinese clones. Choose Better options available with less price and High quality. Like. TDA 2030 series. 7283,3886,7293,7294 ect.
But even if you want to use this IC today , I have suggested the idea of implementation in proper way. See full video to know in detail about the same.