I recently got a very good deal on the ultrafocus 8000 headphones. That is, good deal if everything works properly. Inthis case it isn't and I can't return them.
Although they are used the appearance and sound (when working properly) is mint.
That said there is a strange static sound like a receiver picking up outside interference from something electrical.
I plugged them in to my cd player for 11 hours of constant music. Then I listened to them for approx 3 more hours with no problem. The next morning after 15 minutes of listening it started again. 10 hours later no problems. Does this sound like the driver and NC circuitry is defective. Or could it be some kind of electrical signal it's picking up. It is only in the right headphone side where the NC switch. I have tried new batteries. This is the only NC headphone tha I have owned that has done this.
Also it will make this sound with the cable unplugged. Has anyone experienced this problem.
I appreciate any help on this one.