Improved Output and USB volume.

Input Impedence: 47k
Output Impedence: 32-300 Ohm
Output at 32 Ohm: 3 v, 320 mw
Output at 150 Ohm: 6.2 v, 256
Freqency: 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"

Defaut computer volume for EF2 USB DAC is 50%. Customer will have to maximize computer volume after connect EF2 as USB DAC.

Ship via EMS Express Mail with tracking. Will arrive in 5 to 7 business days.

30 days refund and 90 days replacement

Improved Output and USB volume.

Input Impedence: 47k
Output Impedence: 32-300 Ohm
Output at 32 Ohm: 3 v, 320 mw
Output at 150 Ohm: 6.2 v, 256
Freqency: 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"

Defaut computer volume for EF2 USB DAC is 50%. Customer will have to maximize computer volume after connect EF2 as USB DAC.

Ship via EMS Express Mail with tracking. Will arrive in 5 to 7 business days.

30 days refund and 90 days replacement