Jbl infinity - Product manufacturing defect

I have purchased infinity fuze *** speaker by jbl two years ago with warranty of * year.All was going smooth for * to * months until one day my speaker suddenly get powered off while playing music and was not turning on.At service centre company changed the speaker.They took my original bill and gave exchange bill.(Delivery Challan)
Again after some months again same problem occurred but this time company told me that speaker is out of warranty and i have to pay for all.
By researching it on internet for solution of this problem i found out that same problem is with maximum speaker of this model and by getting checked it from market and some other sources i came to know that this a manufacturing defect as company is getting speaker replaced.But only those who are in warranty.