Affordable but loaded with quality materials, components and craftsmanship, the Action Series basses define value for the aspiring bass player with versatile features as PJ, JJ and soapbar pickup options and active EQ electronics. Action DLX Plus features The Markbass MB-1 EQ providing a very natural and transparent boost that does not color the organic nature or resonance of the instrument’s woods. The crystal clarity and natural warmth combined exude a passive feel with smooth lows, full-bodied mids, and bell-like highs.nres.