SMSL SP200 Headphone Amplifier

S.M.S L. SP200 THX AAA 888 Headphone Amplifier Balanced Headphone Output
Used. in great condition, has minor scuffs and scratches.  Minimal hours, always plugged into a surge protector.  Have two units.
Includes amplifier and power cable.
Ships to anywhere in the 48 contiguous US states.
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FEATURES:

• THX AAA-888 Technology
• Ultra-Compact design - great for desktop
• Toggle switch for operation, input selection, and gain control
• Balanced stereo headphone output
• Balanced stereo line input
• High precision resistors for temperature stability
• Pop-less design with high quality relays
• Selected high precision low-distortion volume potentiometer
• Full protection with DC, over-voltage, over-current, and short-circuit
• Thermal protection on headphone amplifier
• High-efficiency ultra-low noise power supply

SPECS:

• Inputs: Balanced x 1, Unbalanced x 1
• Outputs: Balanced x 1, Unbalanced x 1
• Output Power:
• • 6W x 2 (16ohm)
  • 3W x 2 (32ohm)
  • 440mW x 2 (300ohm)
  • 220mW x 2 (600ohm)
• SNR: 130dB, A-Weighted
• Output Noise: 2.8uV, A-Weighted
• THD+N: -122dB, 0.00007% (1kHz, 32ohm)
• THD+N: -117dB, 0.00013% (20 - 20kHz, 32ohm, -3dB)
• THD: -125dB, 0.00006% (1kHz, 16ohm, -3dB)
• Output Impedance: Near 0ohm
• Frequency Response: 0.1Hz - 500kHz(-3dB)
• Gain: Low(+6dB), High(+18dB)