An affordable alternative in a tube-driven headphone amplifier, the EF2A is a hybrid design, USB headphone amplifier using 6J1 tubes for its input stage and incorporates a Burr-Brown PCM2702 DAC Chip.  The EF2A provides USB input and features 16 bit 44.1 kHz performance. Designed for discriminating music listeners who demand performance and value.

HIFIMAN EF2A is a hybrid USB headphone amplifier using 6J1 tubes as input stage. USB input support 16 bit, 44.1 kHz.

Input Impedance: 47k
Output Impedance: 32-300 Ohm
Output at 32 Ohm: 3 v, 320 mw
Output at 150 Ohm: 6.2 v, 256
Frequency: 20-20khz +/- 0.2db
S/N: 95db
DAC Chip: Burr-Brown PCM2702
Tube: China 6J1 * 2 pcs
Input Voltage: 16 v to 18 v; 500 mA
Power Supply: 110 v or 220 v
Size: 14cm*8.5cm* 4.5cm or 5.6"* 3.4" * 1.8"

Shipping method:
To US, Canada and Russia: USPS
To any other countries: International Express mail (EMS, UPS, DHL or Fedex)

Warranty Policy:
30 days refund: shipping cost is not refundable.
1 year replacement.
The cost to ship a product back to us for repair, replacement, refund, exchange or upgrade is the responsibility of the consumer. The cost to return the product to the consumer is the responsibility of Head Direct/HiFiman