My MDR-7506, a close relative to the V6, didn't last ten years before the high tones got so harsh they hurt to listen to. Never did open them up to see if a con

My MDR-7506, a close relative to the V6, didn't last ten years before the high tones got so harsh they hurt to listen to. Never did open them up to see if a cone failed or something, but did listen to them about ten hours a day.