Gemtune X-1 Class-A Integrated Tube Amplifier with 5Z4P/5U4CX1, 6N9PX1, EL34-BX2 EL34B tube upgraded to PSVANE brand. Vacuum Tube Amplifier; Tubes: 5Z4P/5U4C are randomly distribute, 6N9P, EL34. Stereo Hi-Fi Integrated Amplifier brings you exquisite and refined music;100% handmade ,Particularly Ideal for Vocal Music and Chords. Please download the user manual from:https://s3.amazonaws.com/Doctor-001/GemTune+Amp/Manual+for+Tube+Amplifier+X-1.pdf Features: Self-Biasing Design, Analog Inputs, Output for speaker impedance: 4/6/8ohm.(Note:To protect the amp,tubes and machine are packed individually). GUARANTEE We provide a 1 year warranty for the amplifier and 2 month warranty for the tubes. Our goal is to provide 100% customer satisfaction so you can buy with confidence!