50W large output compact vacuum tube portable keyboard amplifier with Nutube The new model for 50W keyboards equipped with a new vacuum tube Nutube in a small and lightweight VX series amplifier. The coaxial speaker produces clear sound up to high ranges, and the bass reflex structure that plays rich low regions with plenty of output, and the condensed specifications to produce high-quality sound quality while being small and lightweight. 3 channel specifications, each with independent volume, and the CH3 supports microphone input. It can also be used as a simple PA system that is easy to carry around. In addition, there are also a large selection of input/output terminals, such as AUX IN terminals, headphone terminals, and LINE OUT terminals that can be connected to PA devices, etc. Also great for stage monitor amplifiers.