FiiO E17K ALPEN 2

The FiiO E17K ALPEN 2 is a miniature portable DAC with a headphone amplifier that has a unique precision machined all-metal body. The device can be used as an uncompromised handheld headphone amplifier or as an external DAC connected to the USB port of a computer or digital output (coaxial). A significant output power (>200 mW) is available for virtually any headphones with high volume. The sound can be tuned to bass and treble with the built-in electronic equalizer. The device also features an adjustable gain (GAIN 0/6/12 dB).
On the front is an OLED display with a resolution of 128x64 pixels and an indicator that displays the battery status, the volume control and other functions of the device. In comparison to the previous model, it replaces the cluttered operation control with the multifunction knob on the side. And with an end of clicking when selecting on the OLED display - just simply hover to where you need it. Also, other optional features are available - the volume setting, volume limit, automatic key lock and programmable shutdown.
Parameters and Specifications:

Audio characteristics:
Maximum Sampling Frequency: 192 KHz/24bit
Headphone Impedance: 16-150 ohms (recommended)
Output power:> 200 mW at 32 ohm
Frequency range: 20 - 20,000
Total Harmonic Distortion: <0.003% at 1 KHz
Output impedance: <1.1 ohms
Noise signal distance:> 113 dB (AUX input)
Input sensitivity: gain = 0/6/12 dB = 2.7 V / 1.38 V/680 mV
Maximum input level:> 4 Vrms
Crosstalk: 75 dB at 1 KHz
Gain: 0/6/12 dB (switchable)
Maximum output voltage: 7.8 Vp-p
Maximum output current:> 80 mA

Connectors:
1x Micro USB
1x digital coaxial input (with coaxial adapter)
1x 3.5mm input
1x 3.5mm headphone output

Display :
Type: OLED
Resolution: 128 x 64 pixels

Power supply:
USB 5 V / 500 mA
Battery capacity: 1500 mAh
Duration: up to 15 hours
Charging time: 220 minutes

Dimensions:
62.2 x 104.1 x 12.8 mm

Weight:
110 g