Type:Mini Amplifier Channels:2 (2.0) Recommended Headphone Maximum Impedance:501-600 Ohm Model Number:TPA6120 Input Type:LINE IN (AUDIO IN) Output Type:LINE OUT (AUDIO OUT) Output Power:80mW Chip Type: TPA6120A2 Input voltage:Dual AC12-24V(recommend dual AC12V 30W) Protection function: short circuit protection, over temperature protection The TPA6120A is a HIFI-class stereo headphone amplifier from TI that provides 80mW to 600 at a 12V voltage at (+N) of 0,00014% Current feedback architecture; dynamic range 120dB; SNR is 120dB The output noise at a gain of 2V/V is 5V; Conversion rate: 1300V/MS; built-in short circuit and thermal protection; Compatible with 3.5mm and 2.54 3P two input sockets, no noise and current sound, suitable for small space installation. The amp board AC and DC dual power supply 12-24V is available, the thrust is very large, 600 Euro headphones are not to mention. 1% precision resistor, high-quality fever capacitor, ultra-low noise and wide sound field, good separation of left and right channels. Size: 80*52*19MM colour:blue Material:Metal +pc Package Contents: 1 * Headphone Amplifier Board Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.