Can anyone tell me which of the Japanese or European and American amplifiers and speakers improves the sound quality better?

In terms of improving sound quality, the industry has always used Japanese hosts and European and American amplifiers and speakers. From a professional point of view, the characteristics of Japanese amplifiers and speakers are sharp and ear-piercing, the overall effect is hard, and the fullness of the bass is weak, it does not sound like a lump, and the elasticity is not obvious, but for ordinary car owners Generally speaking, whether it is used to enjoy ROCK, POP or symphony, it should be easier to create the corresponding atmosphere, which means that its overall adaptability and application range are wider