I can only report positive things about the E12, the purchase was definitely worth it. I use the E12 on my iPhone when I have the headphones Sennheiser HD25, the AKG K551 and the B & W P5 in use. All headphones he brings problems to their performance limits. The build quality is good, the case looks stable and all controls are dibasic. Sound default, it is superior to the headphone amplifier in my Onkyo TX-NR609 audible. One complaint I could find: there is no cable for the iPhone5 or iPad4 offered, but you have the adapter from Apple to use, but this has something to do with Apple's policies and can not be directly charged to the E12. An output from the headphone output is always possible, but brings with it loss of sound. If a cable are available, there were 5 * +, so there are 5 * -.
