@faizalshukkoor if any of the suggestions from the previous answer does not work, you need to consider that this is a power issue or a speaker issue. For that you will have to disassemble your speaker. Since iFixit does not yet have a guide for that use something like [https://www.youtube.com/watch?v=fp4m93fWl30|this video] Check the speaker for any tears in the membrane etc. Then check the circuit board for any damage and consider replacing the battery. Schematics are of course not available :-(
Before you do any of this, you do want to double check if this device is still covered under warranty. If so, do nothing but contact Bose. Let them fix it on their money, not yours.
If you come across anything that looks odd or you may have questions about, you can always post images of what you are looking it, with your question. [guide|21499]
While you work on your speaker, take lots of pictures. Once you are done with it, take those pictures and create a guide for iFixit. That will help the next person that has a device with the same issues as you do. It's easy and fun to create these guides. https://ifixit.com/Guide/new The iFixit community will appreciate this.
Repair is War on Entropy!