Three - channel tube electric guitar combo with 5 - band EQ and Celestion Custom 90 speaker , including footswitch With the Mesa Boogie Mark V 1x12 Combo . Equipped with three full - fledged channels , 5 - band EQ , reverb and effects loop as well as a variable output stage and the proven Celesion C - 90 Black Shadow speaker , the compact tube leaves no sonic desire unfulfilled . Three channels for sonic nirvana The Mesa Mark V 1x12 Combo's three - channel preamp is based on a total of seven 12AX7 tubes and offers an incredible variety of sounds that leave nothing to be desired between pop , blues , rock and metal . Each channel has three switchable sound modes that have a significant influence on the playback character . In addition to its own 3 - band tone control , each channel also has gain , master and volume controls . In addition , the top offers a 5 - band graphic equalizer for further shaping of the guitar sound . Internal and external effects