The closed-back EL-8 offers all the benefits of the open-back EL-8 - flexible, lightweight and loaded with new technology - while isolating the listener and reducing ambient noise as no sound escapes the earcups. The EL-8 closed-back is also sensitive enough to be driven directly by portable players and smartphones, but an external amplifier produces better results. They're built with superb craftsmanship, wood veneer accents and enormous attention to detail.