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These headphones have a built-in amp? I did not know this. Can anybody confirm? I know the 8000's have some good electronics inside making the noise cancellation and music stream work good...

I just want to say that I really love the headphones. I use these on my daily commute to and from work. I usually sit in the back of the bus next to the return air intake for the heating and...

One thing I noticed while listening to my 8000?s is there is a very slight and random popping noise coming through my headphones. I did a little investigative work and plugged my 8000?s into my...

Hey! Paula Abdule was cool back in her prime. I still like to listen. Nothing wrong with listening to a little old school hip-hop. I looked and listened to PSB, but I found they were made very...

I just purchased the Ultrafocus 8000 yesterday and I already love them. First off, I would like to give kudos to Polk for making the headband out of carbon fiber. In my search for the perfect...