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The FiiO Alpen 2 E17K is a compact portable USB and coaxial digital to analog converter as well as an analog headphone amplifier for driving your favorite headphones at work and 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.
For I/O the unit features a Micro-USB socket for charging, data exchange, and the option of docking with future desktop products. It also features a coaxial digital input with support up to 192 kHz/24-bit PCM input (via the included 3.5mm to coaxial converter plug), as well as a dual-function line in / line out for maximum convenience.
Two front panel buttons allow you to power on the unit, navigate menus on the OLED display, select the input, and lock the device. All other controls such as bass adjustment, gain level, and volume control are provided by a side mounted multifunction control wheel. The device's internal rechargeable battery provides more than 15 hours of operation on an approximately 3 hour and 40 minute charge.
In the Box
FiiO Alpen 2 E17K Portable USB DAC and Headphone Amplifier
Coaxial Adapter Cable
Limited 1-Year Warranty
Table of Contents
Micro USB Coaxial 1/8" (3.5 mm) analog (dual function in and out)
1/8" (3.5 mm) stereo jack (dual function in and out)
Digital volume control (0 to 60)
20 to 20,000 Hz
THD + N
<0.003% (1 kHz)
> 113 dB (AUX IN Gain 0 dB/6 dB)
Line Max Input Level
> 4 Vrms
2.70 V (0 dB) 1.38 V (6 dB) 0.68 V (12 dB)
> 75 dB (1 kHz)
Max Output Voltage per port
> 7.8 Vp-p
>200 mW (32 ohm at <1% THD)
Max Output Current per port
16 to 150 ohms
< 1.1 ohm
96 kHz at 32 bit (USB decoding)
192 kHz at 24 bit (coaxial digital input decoding)