For the purpose of setting the SSF it sure doesn't hurt to find out the exact tuning frequency AND it's simple to do. The process requires only a set of test tones and about five to ten minutes of your time. First off turn your SSF all the way down then set yourself up to play the tones, start at about 40 to 45hz and turn the volume up until the sub is moving enough to easily see. Then change tracks going down one frequency at a time watching the cone's movement closely as you go down. You're looking for the cone to be moving the LEAST amount and when you see it start moving more again you've gone below the tuning frequency. Back up one track at a time until it goes from moving the least to moving more again and keep that up until you've zoned in on the frequency it's moving the least and THAT is your real tuning frequency. Now, for example lets say it is 34hz as you so adamantly claim, then choose a frequency that's three to five hertz lower than the tuning frequency (i.e. 31-29hz). Now turn the SSF up until the movement of the cone is half of what it was when you started. Your SSF is now properly set. No one is trying to be demeaning by what they're saying about your enclosure and whoever built it. They're just trying to help you understand that it may not be as perfect as you first assume.