baoshu1889 Headphone Amp Amplifier Pre-Amp Tube,6N3*2+6N5P,

SEPP (Singled-ended Push Pull) OTL in Class-A Input: Gold-Plated Unbalanced Phono (RCA) Jacks Output: 1/4" Gold-Plated Stereo Headphone out Driver Tubes: 6N3 Power Tubes: 6N5P Frequency Response: 10HZ - 95KHz (-1dB) THD+N: 0.1% (50mW into 300 ohms) Suitable Headphone Impedance: 20- 500 ohms Input Impedance: 50K ohms Pre-Amplifier Output Impedance: 600 ohms Pre-Amplifier Gain: 3-10x (also controlled via gain switches) Pre-Amplifier Voltage: 10V RMS Pre-Amplification circuit includes both driver and power tubes Power Consumption: 28W (228V x 0.124A) Metric: 310mm (length) by 155mm (width) by 120mm (height) English: 8.26 inches (length) by 4.33 inches (width) by 4.18 inches (height) Weight: 2.5 kg or 5.5 lbs.