Audio-Technica - AT-PHA100 Portable Headphone Amp - Black

Portable headphone amplifier provides added sonic power and detail for listening on the go. 3.5 mm analog and USB micro-B digital inputs; 3.5 mm output. Volume knob, high/low gain switch, five-stage digital sampling indicator. Internal rechargeable lithium polymer battery. Includes rubber bands to attach amp to portable device.

You don’t have to settle for wimpy, muddy sound just because you’re on the go. The AT-PHA100 Portable Headphone Amplifier is small (width and length comparable to a smartphone) but packs a powerful punch. Engineered using select audio components, and enclosed in all-aluminum casing to protect the circuitry, the AT-PHA100 gives headphones a rich, detailed boost throughout the sonic range with ultra-low distortion. The AT-PHA100 is equipped with both analog and digital inputs (3.5 mm jack and USB micro-B, respectively) and 3.5 mm headphone jack. It also features a high/low gain switch, machined aluminum volume knob, and five-stage sampling indicator for digital input. The internal lithium polymer rechargeable battery lasts up to 14 hours when amplifying an analog signal, and up to 6 hours when amplifying a digital signal. The amplifier comes with two rubber bands and a rubber mat for strapping the unit to a smartphone or other portable device, a 1.0 m USB cable (USB 2.0 to USB micro-B) and a 10 cm audio cable terminating in a 3.5 mm gold-plated stereo mini plug at each end.