audioholic
5,000+ posts
not a moderator
Even temporary, it should have had some internal bracing added. Especially if/since you knew you were using inferior materials. About a dollar's worth of 2x4's would work for a couple braces. Or a left-over piece of that osb with some holes cut in it. The neighbor's mailbox post. Your dad's old drum sticks screwed together. Almost anything really.
When you have a box with excessive wall flex, a couple bad things can happen. Internal volume will change. And if flex is bad enough, separation can occur allowing unwanted air to enter/escape. Both of these problems will alter system tuning. Frequency response will become erratic, and in the case of wall separation, unwanted and usually audible noise will occur. Your system is still getting loud, your doors are still vibrating, but that doesn't mean bad things aren't still happening. I get the impression you feel this video proves something, but Im not sure what you think it proves. The box is weak, you know it is. Im glad you are happy now, but save up a few bucks and redo the box with mdf AND bracing. You'll be even happier.
And dont forget to bolt the box down securely, for system performance as well as safety. Ive always found it funny, when I tell people bolting the box down is a real safety issue, they say the work isnt worth the risk. But when I tell them it also improves the performance of the stereo itself, they decide its important to do.
