jbl stereo has a murmur Zizi Zizi can be the speaker and the computer's connecting wire or interface contact is poor. The solution is:
1, the speaker's audio input interface a few times more plugging or turning.
2, the speaker audio input interface to the computer panel and the rear panel of the audio interface, try to see if there is a change in sound quality.
3, the above operation without sound quality changes, it may be that the cable shielding is bad, the speaker internal circuit failure, are possible.
JBL is the world's largest manufacturer of professional speakers, from raw materials development, speaker unit design and production, speaker design and production features are fully controlled in their own hands.