Headphones;AmplifierPortable;Headphones;Amplifier4;Channels;Headphones;Amplifier4;Channels;Stereo;Headphones;AmplifierHeadphones;Audio;AmplifierHeadphones;Amplifier\n1Universal to use: 4-channel stereo headphone amplifier is designed to work with all types of headphones, providing maximum flexibility. 2Excellent sound performance: 4-channel headphone amplifier ultra-low noise 4580 operational amplifier ensures excellent sound performance. 3Independent output levels: The 4 channels of the headphone amplifier are set at independent output levels to meet a wide range of listening needs. 4High power stereo: 4 high power stereo amplifiers ensure maximum sound quality even at maximum volume. 5Independent volume control, application: The volume of each output channel can be controlled independently. Suitable for studio and stage applications.\nItem type: Headphone amplifier\r\nMaterial: Iron shell\r\nInput:\r\nType: 1/4 inch TS connector, stereo\r\nImpedance: 100k\r\nMaximum input level: +15dbu \r\nHeadphone output:\r\nType: 1/4 inch TS plug, stereo\r\nImpedance: 80k\r\nMaximum input level: 40mW into 100