Is there a particular need to make your sub boxes symmetrical, or at least geometrically regular? Most boxes seem to be cubic or a cube with one side on an angle - is that just cos it is easier or does having a regular shaped box make a difference to sound reproduction?

I've seen some setups where people have installed a sub into the corner of the boot near a tail light and I'm thinking the enclosure would have to be a bit of a funny shape to fit right - does that make a difference to the sound, even though the volume is still correct/optimal?

i think as long as the internal volume is the same, it shouldnt matter. The reason most are a cube or rectangular i simply the ease of making them that shape.
The thing with odd shapes it would make working out the internal volume a bit harder.
I cant see it making a difference to the sound depending on shape.

Sub box placement however does make a difference to sound, and the easiest way to find out the best spot is to simply move it around your boot and see what you like best.

Yes boxes can be odd shaped as long as the internal volume is correct. Some people actually prefer the odd shape over a perfect cube.

i think as long as the internal volume is the same, it shouldnt matter. The reason most are a cube or rectangular i simply the ease of making them that shape.
The thing with odd shapes it would make working out the internal volume a bit harder.
I cant see it making a difference to the sound depending on shape.

Sub box placement however does make a difference to sound, and the easiest way to find out the best spot is to simply move it around your boot and see what you like best.
As far as I can work out, thats exactly it.. manufactured boxes are usually square purely for ease. From wot I've read, it seems it's better to have an irregular shaped box, because this decreases "internal reflections" of sound waves within the box, which would normally interfear with each other.

If I remember back to my Speaker Design classes, cubes are bad because they will have equal resonant frequencies between all of the box sides (as they are all the same length). The only thing worse than a cube would be a sphere or other round prism as it would have many more resonances.


Basically, if you put a speaker in a cubed box which has sides that will encourage, say 1000Hz, then the frequency response will have a peak at 1000Hz (as this will be the boxes resonant frequency). I know it's a pain in the arse to build an irregular shaped box, but it will probably sound better if you do. Try something trapezoidal for the best results, or at the very least a rectangular prism.

Some enormous enclosures can suffer from standing wave issues but due to most enclosures being small sized this is highly unusual. :D

Some enormous enclosures can suffer from standing wave issues but due to most enclosures being small sized this is highly unusual. :D
Ah yes, of course, because the wavelength of sub frequencies will be much longer than the actual box dimensions, the box won't enhance significant resonant frequencies.