The Hughes & Kettner Duotone is a high-end tube guitar amplifier, characterized by its "dual tone" as its name suggests, offering two distinct sound profiles: a clean channel and an overdrive channel. It features 12AX7 tubes in the preamp and EL34 tubes in the power amp, delivering a rich and warm sound. The clean channel provides a clear and dynamic sound, while the overdrive channel, with its boost function, can handle a wide range of tones from classic rock to lead sounds. Additionally, it is equipped with a parallel FX loop, which minimizes tone degradation when using effects and expands the possibilities for musical expression. It also has two master volume controls that can be switched with a footswitch, making it convenient for adjusting volume on stage. Sound output has been confirmed. The neon tube also lights up properly. - Brand: Hughes & Kettner - Model: Duotone - Output: 100W - Type: Tube Amplifier - Connections: Speaker, Footswitch, Effects Loop - Handle: Metal Handle Thank you for looking.