S.M.S.L saving SH-9 Headphone Amplifier THX AAA Technology RCA/XLR Input 6.35MM Balance

Product Name: S.M.S.L saving SH-9 Headphone Amplifier THX AAA Technology RCA/XLR Input 6.35MM Balance
Description New. Perfect condition Excelent sound. PRICE IS FIRM 
Features
SNR>137dB
THD<0.00006%
Ultra-Compact Design, Perfect for Desktop Systems
High Precision Resistors for Temperature Stability
Pop-less Design with High-Quality Relays
High precision and low noise 256 level relay volume control; In actual use, in order to make the volume more linear, the extra levels are shielded.
2 Positions Switchable Gain Control
High-Eficiency Ultra-Low-Noise saving Power Supply
1.9 inch LCD display.

Specifications

Audio Section:
Inputs:Balanced x1, Unbalanced x1
Outputs:Balanced x1, Unbalanced x1
Output Power:6W x 2(16Ω)
3W x 2(32Ω)
440mW x 2 (300Ω)
220mW x 2 (600Ω)
SNR:137dB, A-Weighted
Output Noise:1.9uV, A-Weighted
THD+N:-123dB, 0.00006% (A-Weighted)
THD+N:-117dB, 0.00013% (20-20kHz, 32Ω,-3dB)
THD:-125dB, 0.00006%(1kHz, 16Ω, -3dB)
Input Impedance:47kΩ
Output Impedance:Near 0Ω
Frequency Response:0.1Hz-500kHz(-3dB)
Gain:Low(+0dB).