Due to the development of modern speakers and the development of speaker production technology, the low frequency and high frequency of full-range speakers can also be better. Nowadays, general fans think that full-range speakers cannot adapt to large scenes and multi-instrument performances. This is actually a high-end misunderstanding. Full-range speakers can play symphony. A good full-range, in addition to frequency response, tone is the soul of sound. So the production of full-range speakers is more difficult