Does jbl BRIC Bluetooth box need maintenance?

How to cook headphones:

1, the first is to turn on the full frequency, in order to get through the strange sound of headphones. The method is to play it continuously with a variety of different frequencies, and usually rest after one to two hours, but the volume should not be too loud, and it will have obvious effects in about ten hours. After this stage, the bass performance of the original headphones has also been significantly enhanced, but due to the limitation of my sound card, the maximum signal of the headphones I made can only be 1 1025 Hz, but it is absolutely enough. The vibration frequency range of sound that adults can hear is about 20-20000 Hz. Sound waves with frequencies below 20Hz are called infrasound waves, and those with frequencies above 20000 Hz are called ultrasonic waves. Infrasound and ultrasound are inaudible sound waves. But I had an experience before, that is, I listened to these audio signals (with a big speaker) at a friend's house, trying to see if anyone had golden ears, but just then my friend's children (about 4-5 years old) ran out of the room and shouted what sounds were so ugly, which proved that children's ears were stronger than adults. (Note that it is best not to listen to the earphone signal, which will make people uncomfortable. )

2. The next thing to do is the sense of music (especially high-quality headphones will be of great help). Most of them use pure music soundtrack, with high sound quality and wide audio frequency. Personally, I prefer City of Sorrow and Happy Hotel. Use the same method as above. If you listen to more pop songs at this stage, you can change your taste. Listening to these pure music will give people a very comfortable feeling

At this time, you can choose your favorite music to play, which will give full play to this type of music. In fact, the sound quality of headphones will be improved if they are used for a long time without being boiled. But I have never been able to get through the strange classics and music sense, and the sound quality has not been fully exerted. So I said that old headphones should also be cooked, but the impact is big and small.

Precautions for boiling headphones:

1. Pay attention when cooking the machine. If you are not sure whether the volume is too high, ask someone to listen to it for you. If you can't use headphones for 10 seconds (for reasons you don't like), the volume is too high.

CD 1:5 minutes of white noise, 1 minute of broken glass, 30 minutes of violin and piano concerto, 2 minutes of 80-25KHZ sweep, 5 minutes of white noise, 3 minutes of Apollo13 takeoff, 2 minutes of 80-25KHZ sweep, 10 minute.

Cd2:15min pink noise,15min 20-20KHZ sweep, 5min drum,15min white noise, 5min sweep, 5min drum,15min symphony.

Play CD 1 20 hours at 2/3 of the normal listening volume on the first day.

The next day, play CD2 1 1 hour at 2/3 of the normal listening volume, and play CD2 1 1 hour at 2/3 of the normal listening volume.

On the third day, play CD2 at the normal listening volume of 4/3, 18 hours.

On the fourth day, play CD 1, 1 1 hour at the normal listening volume, and play CD 2 1 1 hour at the normal listening volume.

On the fifth day, play CD2 15 hours at the normal volume, and call it a day. A total of 97 hours.

Cooking music includes:

Long time no see, Eason Chan.

California eagle hotel

The girl king in Dabancheng

The ancient song "high mountains and flowing water"

The First Drum of Yanhuang-Yan Xuemin