When I click the + or - , the volume goes all the way to mute or to the extreme volume. Not horrible, but I couldnt get the amplification I wanted without a noticeable crackle from the speakers. When I first out these on I thought I had just bought youre run of the mill headphones boy was I wrong the sound blew me away. Conclusion:For this price range, I think these headphones are top notch. This little guy sounds great in any room I place it around home. HOWEVER i can wear and walk in the size 9 due to the strap around the ankle. Theyre comfortable, a handful in the bag were a bit too big, not much, but just enough to be irritating. This is the best strap I?ve ever owned and I?ve owned tons. I do not recommend it. It has some features that I have not seen before, which really make this rack convenient to use.