sub frequency response, weird shape

Hey Guys,

I'm currently planning/ beginning to glass the outer wall of my sub enclosure. You'll have to use some imagination but here is my Question. I would like to have the whole left indented part of the trunk be the outer wall of the enclosure, and the front wall will be flat with the contours leading into the cabin. The problem is: the arm that holds the trunk lid rotates quite a bit down into the proposed enclosure area. If I build a bit on an indent to allow the motion of the trunk arm will the   pockets that result from this cause any freq. response or harmonics problems, etc.?

thanks a bunch, Brian

In the hopes of generating a response, heres a picture to better illustrate what my dilemma is:



You can see how the trunk arm will swing down into some area that I would like to utilize. My target size is about 1.5cf and I don't think I will make it if I have to cut off that side of the enclosure low enough for the arm to complete its travel. Any ideas?

Uneven and non parallel surfaces are actually a good thing and are the very best way to avoid destructive internal standing waves. As for volume you can extend your enclosure to run along the rear wall of the trunk below the trunk opening. You can even cover this portion in a material that disguises its existence.
If you are using a sealed enclosure design a loss of volume that amounts to 20% or less of your target will not likely be detrimental to your frequency response. In the event that you are using a vented design that might not be the case and there are several other factors that must be considered before you can determine if that loss of air space will have a negative effect.