Thank you so much for the info. I visited the service center of westone w80 and they told me that this is not driver issue. I am hearing those crackling sounds at high volumes. for wm1a/z, at about 70+ volume. Btw, i bought this from headphone concept store at plaza sing

Hello, I bought westone w80 last week. at first, i used my iphone with dongle to listen to music and i was hearing the crackling sounds at female vocal high pitches. So i tried sony WM1A and WM1Z and i m still hearing a bit. Is it due to lack of burn-in duration or these cannot power up w80...