FiiO Alpen 2 E17K

Portable USB DAC and Headphone Amplifier. The FiiO Alpen 2 E17K is a compact portable USB and coaxial digital to analog converter and an analog headphone amplifier for driving headphones at home or on the road. Using the unit's SA9027 USB receiver chip, the device can be used as an external sound card for computers with support for up to 96 kHz 32 bit files and DSD decoding (with ASIO driver and SACD plug-in). It features the Texas Instruments PCM5102 digital to analog converter for improved S/N ratio, lower distortion, and more linear digital-analog conversion characteristics than previous generations. It also uses Texas Instruments' flagship OPA1622 low-pass filter, and the OPA1642+LMH6643 chips in an OP+BUF architecture that is often found in higher-end conversion systems. Color: Black. SpecsModel Name/Number ALPEN 2-E17K Color BlackWeight 110 g Dimensions 104.1 mm×62.2 mm×12.8 mmAudio Input Micro USB/Coaxial/3.5 mm jackCOAXIAL adapter attached Headphone output 3.5 mm stereo jackVolume Control Digital Volume Control (0-60) Bass Adjustment YesRecommended Headphne Impedance 16~150 Ω (Recommended) Power Input DC5V 1A recommendedBattery Capacity 1500 mAh Battery Life 15 hOutput Power 200 mW (32 Ω/THD<1%) Charge Time ≤ 220 minTHD+N 0.003% (1 kHz) Output Impedance 1.1 ΩFrequency Response 20 Hz~20 kHz SNR 113 dB (AUX IN Gain 0 dB/6 dB)Input Sensitivity 2.7 V (0 dB) 1.38 V (6 dB) 0.68 V (12 dB) Max Input Level 4 VrmsCrosstalk 75 dB (1 kHz) Channel Imbalance 0.5 dBGain 0/6/12 dB Bass Adjustment Range ±10 dBMAX output voltage 7.8 Vp-p MAX Output Current 115 mA