I didn?t like paying this much for it, but have had good luck with Spigen products. I purchased these on an open box item from Amazon. Normalerweise ist Sennheiser eine sehr gute Marke, der ich auch sehr Traue, aber bei diesem Produkt fehlt einfach der Feinschliff, wodurch es sehr viele Probleme und Fehler mit sich bringt. It is not study,, will be returning the item. Parece tener como 4 número menos. Im running this off my android phone, with aptX installed(I am also a techie so I took advantage of the aptX compatibility and flashed that onto my custom ROM). Then I picked up a pair of the Beyerdynamic DT 770. When the bar was being manufactured they welded part of bolt slot, making it unusable. The idea that the listener is able to hear what is going on around him better than if he were to wear headphones or earphones / ear buds. Most of the others either bogged down and didnt spin freely when fully loaded, or had a rocky and wobbly spin when loaded to capacity.