I was recommended by my colleagues in the company. Actually, my friend asked me to spell the bill together before. I hesitated. The main audio line is too deep to move easily. Now that I have a friend, Mouse, I feel much more relaxed. At that time, it was recommended by a friend, and 500 yuan was given a discount. When I placed an order, the salesman told me that they had three series. I wanted to buy a German set meal, but it was too expensive. My private money was limited, so I bought this X series, but I felt that this series should satisfy me. I'm not a top fan. The next day, the master went to the door to install it and installed it in the parking lot of my community. It took about three hours to finish, and the master was skilled and neat. The overall effect feels better than my friend's. The master said that maybe my host is relatively new and the resolution is better, because I am 18 and my friend's is 16. Moreover, the overall improvement is too obvious. The bass is powerful, penetrating, and the middle and high notes are distinct, especially the vocal part is very bright, which is a pleasant online shopping.