Got to use my Markbass CMD 121P combo with my newly purchased Hartke HX-112 entension cab- this past weekend. Sounds wonderful!! Was playing outdoors... tried as a stack- nice... also seperated each cab. on either side of drums (speakon cable)... allowed the Markbass to give a little more low end (on the floor). Earlier posted that I was a bit hesitant- buying the Hartke without being able to hear it- but is is the perfect match!! ! I normally use a 2010 MIA Fender Jazz- but took my 2006 MIM Precision (outdoor

kids

). Read some posts regarding the "flatness" of Markbass... probably wouldn't disagree- works for me... but the Hartke adds some low-end that really does complete the sound. Using as a stack will probably be the best way to go!