GemTune GS-01 Class A Integrated Hi-Fi Tube Amplifier with Tubes, EL34BX2,6N9PX2,5U4CX1 SOPHISTICATED DESIGN: this amp appearance is constructed from high quality stainless steel and solid wood that not only has trendy silver metal texture but also has retro atmosphere.Please download the user manual from:https://s3.amazonaws.com/Doctor-001/GemTune+Amp/GemTune+GS-01.pdf HIGH QUALITY TUBES: We utilize PSVANE/Shuguang brand EL34 tubes for outstanding treble and alto(PSVANE/Shuguang brand randomly distribute). 6N9P tubes provide deep and powerful bass and we use a 5U4C tube as a rectifier. Our tubes and amp are packaged individually as to avoid damage. GREAT PERFORMANCE: Our Class A single-ended amplifier eliminates any annoying distortion and provides the highest quality sound. Your music will sound great no matter the genre! Our amp perfectly balances tone to give a crisp and clear sound experience. EXTRA FEATURES: We utilize two VU level meters and it will tilt slightly according to the frequency of the music.Please Note: Please do not attempt to reset the VU level meter without guidance from our team! GUARANTEED QUALITY: We provide a full one-year warranty for the amplifier and two month-warranties for all of the tubes that are provided. We strive for 100% customer satisfaction every time!