Gemtune GS-02M Hi-Fi Integrated Tube Amplifier w/ VU Level Meter,Tube KT88X2, 6H8CX2, 5Z3PX1 SOPHISTICATED DESIGN: Our amp is constructed from high quality CNC cold-rolled steel that has a trendy matte black finish. HIGH QUALITY TUBES:We utilize PSVANE/Shuguang brand KT88 tubes for vigorous and forceful sound(PSVANE/Shuguang brand randomly distribute). 6H8C tubes provide soft and penetrating sound and we use a 5Z3P tube as a rectifier. Our tubes and amp are packaged individually as to avoid damage. GREAT PERFORMANCE:Class A Single Ended Amplifier reduces annoying distortion, provides high dynamic and more powerful sound and be suitable for classic music and symphony. The rated power is high enough to make soft and strong in low frequency, displaying thick and rough! In high frequency with speakers of 20-150W and sensitivity above 89DB, the sound out will be gentle and soft, but also outstanding in low volume. EXTRA FEATURES: We utilize a customized VU level meter from Rivals Audio Company. It has highly sensitive double pointers that 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!