actually, the cone that connects to the voicecoil is not free anymore. that (depending on vc diamater) in^2 area where the former connects to the backside of the cone is not pushing air anymore. not a huge difference. but a difference. (most likely NOT audible in daily)
and that whole bit about aiming the subs forward to get 'the most' out of them - its utter cowpies. that is not true in any way shape or form. EVERY install is 100% its own beast and requires testing, otherwise- what worked for you - may have adverse effects for somone else //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif
and inverting is usually for looks. i like the cone myself. but inverting is cool in certain applications - and sometimes, that .3 cubes is needed (wheelwell?) //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif