January 31, 2012 7:56:56 AM PST
in my personal experience, back firing was simply louder, granted, when i had corner mounted woofers, they were entry level while my back firing were several steps up... but i'd say if you have the option of fibreglassing proper airspace for your woofers, its the way to go. Saves space and should hit just as hard as any 3/4" mdf box.