There is that much air back there. I measured the interior volume and glassed in the holes to make them air tight. The water and gas vent hoses are still in place and come out the bottom. The fronts are run full range as the ADS plates are essentially flat to 40Hz and I listen to no rap or hip-hop. The exagerated bass is not required for what I do. I am a Mechanical Engineer here in St Louis and own an Audio / Video consulting company mainly working with large venue reinforcement so I have at least had a bit of experience in this field.
Driver's side. Maybe mine is different than yours.
Steve