This is the 1 x 12" AC30. It has trem, a real 3 spring reverb tank, the top boost circuit, and two channels that you can link together. Its the most versatile of the modern AC30's I think you'd have to say. With switchable output impedance (and an extension jack), switchable output tube bias resistors and switchable filtering on the B+, a "dwell" control on the reverb drive circuit, trem' on both the normal and high boost channels, even if you are not a Vox devotee you can dial these amps in to a variety of tonal zones. Just did a filter cap job and went with the F and T's, its sounding cool! These guys at North Coast Music do a nice write up: Vox AC30 CC1