Grammatico Blackpool was created to duplicate the classic recorded sounds of the early Marshall’s with a wide range of tones from clean to classic overdrive. Meticulous attention to detail to achieve the warm, vintage, blooming tone using modern, custom made components for maximum reliability and consistency. Uses 3 12AX7 preamp tubes and a pair of KT66 power tubes with solid state rectification, 4, 8 and 16 ohm impedance and multiple primary voltage selection