Kind of a platypus of amps. 6L6 tubes (Fender), a presence knob (Marshall) 5 band EQ (Mesa)and great tube distortion (Carvin). The amp has its own vibe,
My first channel switcher was an X100B...Fozzy Bear series w/ 4x12 cab circa 1995. The head is long gone but the British Series loaded cab is still going strong and has always served me well. The head was serviceable but I don't miss it.