Thank you for viewing. I have confirmed the sound output for this listing. All knobs and input jacks function well without any crackling. The tremolo also works. It has a SOVTEK 12AX7 vacuum tube. I have been using a Pathfinder at home for many years, but the Cambridge is easier to use because of its vacuum tube distortion characteristics, and it's also easier to equalize with the mid-boost. The character is like a high-grade version of the Pathfinder. - Brand: VOX - Original Price: 25,800 yen - Speaker: 8-inch CELESTION - Model: Cambridge 15 - Controls: Gain, Volume, Treble, Bass, Tremolo Speed, Tremolo Depth - Switches: Gain Boost, Midrange Boost - Output: 30W - Input Jacks: Input, Footswitch - Output Jacks: Headphone, 8Ω 15W External Speaker Out, Line Out - Appearance: Black