Negative Positive
Title: Worked fine first, but blew up in a month
Review: I used these with my Treo phone/MP3 player for a month or two, in which period I flew a number of times. The product was okay, but whether it was real noise cancelation or just the creation of white noise (hiss) - I am not completely sure.The problem was that during my last flight I blew up the amplifier/noise canceling unit. Probably the sound level on the Treo was louder than the Philips unit could stand. I now have good sound in one ear but the other channel is dead.Also the silicone earbuds keep falling off. I am running out of replacement earbuds so this headphone is end-of-life.I will have to try to get a warranty replacement.(Update:) I live in Europe and had the item delivered to a US hotel when I was there. Now Philips Europe does not want to service it, but asks me to send it to the original seller. It's not worth the shipping cost, so I ordered Plane Quiets instead.
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