The HI MODE of the Fillmore™ 50 offers hefty crunch and low end punch when opened up through a closed-back cab. The 2×12 Fillmore open-back extension cab loaded with Celestion Custom Black Shadow C90 speakers is a great match for the Fillmore’s clean and medium gain tones while offering some gritty midrange cut for higher gain sounds. In comparison, closed-back cabs like the Recto® Traditional 4×12 Straight loaded with Celestion Vintage 30’s, definitely round out the bass and deliver added punch! #fillmore50 #mesaboogie #mesaengineering