~ 18KHZ FiiO E5 is a Portable Headphone Amplifier designed to improve the sound quality and volume of any portable audio source such as MP3 players, iPods, personal media players, mobile phones, laptops, notebooks/netbooks, or portable CD players. The E5 retains all of the advantages of the popular E3 while adding many new features and a substantial boost in performance, all inside a very small and slim aluminum case. With built-in volume controls, the E5 can be used with the line-level output of audio sources for even better sound quality. Specifications - Output Power: 100mW (32ohms Load) 18mW (300ohms Load) - Signal to Noise Ratio: >=98dB (A Weight) - Power Supply: 200mAh rechargerable battery - Frequency Response: 10Hz - 60kHz - Dis...  (less)